diff --git a/src/backend/agents/__init__.py b/src/backend/agents/__init__.py
index d7d89a7..03280b1 100644
--- a/src/backend/agents/__init__.py
+++ b/src/backend/agents/__init__.py
@@ -1,16 +1,7 @@
 from __future__ import annotations
 
 import traceback
-from pydantic import BaseModel, Field  
 from typing import (
-    Literal,
-    get_args,
-    List,
-    AsyncGenerator,
-    TYPE_CHECKING,
-    Optional,
-    ClassVar,
-    Any,
     TypeAlias,
     Dict,
     Tuple,
diff --git a/src/backend/agents/base.py b/src/backend/agents/base.py
index 7e3c8e3..21119f4 100644
--- a/src/backend/agents/base.py
+++ b/src/backend/agents/base.py
@@ -5,51 +5,41 @@ from typing import (
     get_args,
     List,
     AsyncGenerator,
-    TYPE_CHECKING,
     Optional,
     ClassVar,
     Any,
-    TypeAlias,
-    Dict,
-    Tuple,
 )
-import json
 import time
-import inspect
 import re
 from abc import ABC
-import asyncio
 from datetime import datetime, UTC
 from prometheus_client import Counter, Summary, CollectorRegistry  # type: ignore
 import numpy as np  # type: ignore
 import json_extractor as json_extractor
 from pydantic import BaseModel, Field, model_validator  # type: ignore
 from uuid import uuid4
-from typing import List, Optional, Generator, ClassVar, Any, Dict, TYPE_CHECKING, Literal
+from typing import List, Optional, ClassVar, Any, Literal
 
-from datetime import datetime, date, UTC
-from typing_extensions import Annotated, Union
+from datetime import datetime, UTC
 import numpy as np  # type: ignore
 
 from uuid import uuid4
 from prometheus_client import CollectorRegistry, Counter  # type: ignore
-import traceback
 import os
-import json
 import re
 from pathlib import Path
 
 from rag import start_file_watcher, ChromaDBFileWatcher
 import defines
 from logger import logger
-from models import (Tunables, CandidateQuestion, ChatMessageUser, ChatMessage, RagEntry, ChatMessageMetaData, ApiStatusType, Candidate, ChatContextType)
+from models import (Tunables, ChatMessageUser, ChatMessage, RagEntry, ChatMessageMetaData, ApiStatusType, Candidate, ChatContextType)
 import utils.llm_proxy as llm_manager
 from database.manager import RedisDatabase
 from models import ChromaDBGetResponse
 from utils.metrics import Metrics
 
 
-from models import ( ApiActivityType, ApiMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageStatus, ChatMessageStreaming, LLMMessage, ChatQuery, ChatMessage, ChatOptions, ChatMessageUser, Tunables, ApiMessageType, ChatSenderType, ApiStatusType, ChatMessageMetaData, Candidate)
+from models import ( ApiActivityType, ApiMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageStatus, ChatMessageStreaming, LLMMessage, ChatMessage, ChatOptions, ChatMessageUser, Tunables, ApiStatusType, ChatMessageMetaData, Candidate)
 from logger import logger
 import defines
 from .registry import agent_registry
@@ -64,7 +54,6 @@ class CandidateEntity(Candidate):
 
     async def cleanup(self):
         """Cleanup resources associated with this entity"""
-        pass
    
     # Internal instance members
     CandidateEntity__agents: List[Agent] = []
diff --git a/src/backend/agents/candidate_chat.py b/src/backend/agents/candidate_chat.py
index bfdc2b8..41faaf4 100644
--- a/src/backend/agents/candidate_chat.py
+++ b/src/backend/agents/candidate_chat.py
@@ -1,13 +1,11 @@
 from __future__ import annotations
 from typing import Literal, AsyncGenerator, ClassVar, Optional, Any
-from datetime import datetime
-import inspect
 
 from .base import Agent, agent_registry
 from logger import logger
 
 from .registry import agent_registry
-from models import ( ApiMessage, ChatMessageError, ChatMessageStatus, ChatMessageStreaming, ChatQuery, ChatMessage, Tunables, ApiStatusType, ChatMessageUser, Candidate)
+from models import ( ApiMessage, Tunables, ApiStatusType)
 
 
 system_message = f"""
diff --git a/src/backend/agents/general.py b/src/backend/agents/general.py
index 308de40..ddb50a1 100644
--- a/src/backend/agents/general.py
+++ b/src/backend/agents/general.py
@@ -1,13 +1,10 @@
 from __future__ import annotations
-from typing import Literal, AsyncGenerator, ClassVar, Optional, Any
+from typing import Literal, ClassVar
 from datetime import datetime
-import inspect
 
 from .base import Agent, agent_registry
-from logger import logger
 
 from .registry import agent_registry
-from models import ( ChatQuery, ChatMessage, Tunables, ApiStatusType)
 
 system_message = f"""
 Launched on {datetime.now().isoformat()}.
diff --git a/src/backend/agents/generate_image.py b/src/backend/agents/generate_image.py
index b68eafa..2f58091 100644
--- a/src/backend/agents/generate_image.py
+++ b/src/backend/agents/generate_image.py
@@ -1,6 +1,4 @@
 from __future__ import annotations
-from datetime import UTC, datetime
-from pydantic import model_validator, Field, BaseModel  
 from typing import (
     Dict,
     Literal,
@@ -12,25 +10,17 @@ from typing import (
     Optional
 #    override
 )  # NOTE: You must import Optional for late binding to work
-import inspect
 import random
-import re
-import json
-import asyncio
 import time
-import asyncio
 import time
 import os
-import hashlib
 
-from .base import Agent, agent_registry, LLMMessage
-from models import ActivityType, ApiActivityType, Candidate, ChatMessage, ChatMessageError, ChatMessageMetaData, ApiMessageType, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatOptions, ChatSenderType, ApiStatusType, Tunables
-import helpers.model_cast as model_cast
+from .base import Agent, agent_registry
+from models import ApiActivityType, ChatMessage, ChatMessageError, ChatMessageStatus, ChatMessageStreaming, ApiStatusType, Tunables
 from logger import logger
 import defines
 import backstory_traceback as traceback
 
-from image_generator.image_model_cache import ImageModelCache
 from image_generator.profile_image import generate_image, ImageRequest
 
 seed = int(time.time())
diff --git a/src/backend/agents/generate_persona.py b/src/backend/agents/generate_persona.py
index 7d5f1d1..0cf2684 100644
--- a/src/backend/agents/generate_persona.py
+++ b/src/backend/agents/generate_persona.py
@@ -1,5 +1,4 @@
 from __future__ import annotations
-from datetime import UTC, datetime
 from pydantic import model_validator, Field, BaseModel  # type: ignore
 from typing import (
     Dict,
@@ -13,20 +12,17 @@ from typing import (
     Optional
 #    override
 )  # NOTE: You must import Optional for late binding to work
-import inspect
 import random
 import re
 import json
-import asyncio
 import time
-import asyncio
 import time
 import os
 import random
 from names_dataset import NameDataset, NameWrapper # type: ignore
 
-from .base import Agent, agent_registry, LLMMessage
-from models import ApiActivityType, Candidate, ChatMessage, ChatMessageError, ChatMessageMetaData, ApiMessageType, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatOptions, ChatSenderType, ApiStatusType, Tunables
+from .base import Agent, agent_registry
+from models import ApiActivityType, ChatMessage, ChatMessageError, ApiMessageType, ChatMessageStatus, ChatMessageStreaming, ApiStatusType, Tunables
 from logger import logger
 import defines
 import backstory_traceback as traceback
diff --git a/src/backend/agents/generate_resume.py b/src/backend/agents/generate_resume.py
index bb12ca9..213c3f4 100644
--- a/src/backend/agents/generate_resume.py
+++ b/src/backend/agents/generate_resume.py
@@ -10,18 +10,12 @@ from typing import (
     Optional
 #    override
 )  # NOTE: You must import Optional for late binding to work
-import inspect
-import re
 import json
-import traceback
-import asyncio
-import time
-import asyncio
 import numpy as np  # type: ignore
 
 from logger import logger
 from .base import Agent, agent_registry
-from models import (ApiActivityType, ApiMessage, ApiStatusType, Candidate, ChatMessage, ChatMessageError, ChatMessageResume, ChatMessageStatus, JobRequirements, JobRequirementsMessage, SkillAssessment, SkillStrength, Tunables)
+from models import (ApiActivityType, ApiMessage, ApiStatusType, ChatMessage, ChatMessageError, ChatMessageResume, ChatMessageStatus, SkillAssessment, SkillStrength)
 
 class GenerateResume(Agent):
     agent_type: Literal["generate_resume"] = "generate_resume" # type: ignore  
diff --git a/src/backend/agents/job_requirements.py b/src/backend/agents/job_requirements.py
index 9f02325..6044af9 100644
--- a/src/backend/agents/job_requirements.py
+++ b/src/backend/agents/job_requirements.py
@@ -11,17 +11,12 @@ from typing import (
 #    override
 )  # NOTE: You must import Optional for late binding to work
 import inspect
-import re
 import json
-import asyncio
-import time
-import asyncio
 import numpy as np  # type: ignore
 
-from .base import Agent, agent_registry, LLMMessage
-from models import ApiActivityType, ApiMessage, Candidate, ChatMessage, ChatMessageError, ChatMessageMetaData, ApiMessageType, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatOptions, ChatSenderType, ApiStatusType, Job, JobRequirements, JobRequirementsMessage, Tunables
+from .base import Agent, agent_registry
+from models import ApiActivityType, ApiMessage, ChatMessage, ChatMessageError, ChatMessageStatus, ChatMessageStreaming, ApiStatusType, Job, JobRequirements, JobRequirementsMessage, Tunables
 from logger import logger
-import defines
 import backstory_traceback as traceback
 
 class JobRequirementsAgent(Agent):
diff --git a/src/backend/agents/rag_search.py b/src/backend/agents/rag_search.py
index 8431218..8fe27eb 100644
--- a/src/backend/agents/rag_search.py
+++ b/src/backend/agents/rag_search.py
@@ -1,13 +1,11 @@
 from __future__ import annotations
-from typing import Literal, AsyncGenerator, ClassVar, Optional, Any, List
-from datetime import datetime, UTC
-import inspect
+from typing import Literal, AsyncGenerator, ClassVar, Optional, Any
 
 from .base import Agent, agent_registry
 from logger import logger
 
 from .registry import agent_registry
-from models import ( ApiMessage, ChatMessage, ChromaDBGetResponse, ApiStatusType, ChatMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageStatus, ChatMessageStreaming, ChatOptions, ApiMessageType, ChatSenderType, ApiStatusType, ChatMessageMetaData, Candidate, Tunables )
+from models import ( ApiMessage, ApiStatusType, ChatMessageError, ChatMessageRagSearch, ApiStatusType, Tunables )
 
 class Chat(Agent):
     """
diff --git a/src/backend/agents/skill_match.py b/src/backend/agents/skill_match.py
index e03030f..0a21c05 100644
--- a/src/backend/agents/skill_match.py
+++ b/src/backend/agents/skill_match.py
@@ -10,20 +10,13 @@ from typing import (
     Optional
 #    override
 )  # NOTE: You must import Optional for late binding to work
-import inspect
-import re
 import json
-import asyncio
-import time
-import asyncio
 import numpy as np   # type: ignore
 
-from .base import Agent, agent_registry, LLMMessage
-from models import (ApiMessage, Candidate, ChatMessage, ChatMessageError, ChatMessageMetaData, ApiMessageType, ChatMessageRagSearch, 
-ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatOptions, 
-ChatSenderType, ApiStatusType, EvidenceDetail, SkillAssessment, Tunables)
+from .base import Agent, agent_registry
+from models import (ApiMessage, ChatMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageSkillAssessment, ApiStatusType, EvidenceDetail, 
+SkillAssessment, Tunables)
 from logger import logger
-import defines
 import backstory_traceback as traceback
 
 class SkillMatchAgent(Agent):
diff --git a/src/backend/auth_utils.py b/src/backend/auth_utils.py
deleted file mode 100644
index 0a31dac..0000000
--- a/src/backend/auth_utils.py
+++ /dev/null
@@ -1,275 +0,0 @@
-# auth_utils.py
-"""
-Secure Authentication Utilities
-Provides password hashing, verification, and security features
-"""
-
-import traceback
-import bcrypt 
-import secrets
-import logging
-from datetime import datetime, timezone, timedelta
-from typing import Dict, Any, Optional, Tuple
-from pydantic import BaseModel 
-
-logger = logging.getLogger(__name__)
-
-class PasswordSecurity:
-    """Handles password hashing and verification using bcrypt"""
-    
-    @staticmethod
-    def hash_password(password: str) -> Tuple[str, str]:
-        """
-        Hash a password with a random salt using bcrypt
-        
-        Args:
-            password: Plain text password
-            
-        Returns:
-            Tuple of (password_hash, salt) both as strings
-        """
-        # Generate a random salt
-        salt = bcrypt.gensalt()
-        
-        # Hash the password
-        password_hash = bcrypt.hashpw(password.encode('utf-8'), salt)
-        
-        return password_hash.decode('utf-8'), salt.decode('utf-8')
-    
-    @staticmethod
-    def verify_password(password: str, password_hash: str) -> bool:
-        """
-        Verify a password against its hash
-        
-        Args:
-            password: Plain text password to verify
-            password_hash: Stored password hash
-            
-        Returns:
-            True if password matches, False otherwise
-        """
-        try:
-            return bcrypt.checkpw(
-                password.encode('utf-8'), 
-                password_hash.encode('utf-8')
-            )
-        except Exception as e:
-            logger.error(f"Password verification error: {e}")
-            return False
-    
-    @staticmethod
-    def generate_secure_token(length: int = 32) -> str:
-        """Generate a cryptographically secure random token"""
-        return secrets.token_urlsafe(length)
-
-class AuthenticationRecord(BaseModel):
-    """Authentication record for storing user credentials"""
-    user_id: str
-    password_hash: str
-    salt: str
-    refresh_tokens: list = []
-    reset_password_token: Optional[str] = None
-    reset_password_expiry: Optional[datetime] = None
-    last_password_change: datetime
-    mfa_enabled: bool = False
-    mfa_method: Optional[str] = None
-    mfa_secret: Optional[str] = None
-    login_attempts: int = 0
-    locked_until: Optional[datetime] = None
-    
-    class Config:
-        json_encoders = {
-            datetime: lambda v: v.isoformat() if v else None
-        }
-
-class SecurityConfig:
-    """Security configuration constants"""
-    MAX_LOGIN_ATTEMPTS = 5
-    ACCOUNT_LOCKOUT_DURATION_MINUTES = 15
-    PASSWORD_MIN_LENGTH = 8
-    TOKEN_EXPIRY_HOURS = 24
-    REFRESH_TOKEN_EXPIRY_DAYS = 30
-
-class AuthenticationManager:
-    """Manages authentication operations with security features"""
-    
-    def __init__(self, database):
-        self.database = database
-        self.password_security = PasswordSecurity()
-    
-    async def create_user_authentication(self, user_id: str, password: str) -> AuthenticationRecord:
-        """
-        Create authentication record for a new user
-        
-        Args:
-            user_id: Unique user identifier
-            password: Plain text password
-            
-        Returns:
-            AuthenticationRecord object
-        """
-        if len(password) < SecurityConfig.PASSWORD_MIN_LENGTH:
-            raise ValueError(f"Password must be at least {SecurityConfig.PASSWORD_MIN_LENGTH} characters long")
-        
-        # Hash the password
-        password_hash, salt = self.password_security.hash_password(password)
-        
-        # Create authentication record
-        auth_record = AuthenticationRecord(
-            user_id=user_id,
-            password_hash=password_hash,
-            salt=salt,
-            last_password_change=datetime.now(timezone.utc),
-            login_attempts=0
-        )
-        
-        # Store in database
-        await self.database.set_authentication(user_id, auth_record.model_dump())
-        
-        logger.info(f"🔐 Created authentication record for user {user_id}")
-        return auth_record
-    
-    async def verify_user_credentials(self, login: str, password: str) -> Tuple[bool, Optional[Dict[str, Any]], Optional[str]]:
-        """
-        Verify user credentials with security checks
-        
-        Args:
-            login: Email or username
-            password: Plain text password
-            
-        Returns:
-            Tuple of (is_valid, user_data, error_message)
-        """
-        try:
-            # Get user data
-            user_data = await self.database.get_user(login)
-            if not user_data:
-                logger.warning(f"⚠️ Login attempt with non-existent user: {login}")
-                return False, None, "Invalid credentials"
-            
-            # Get authentication record
-            auth_record = await self.database.get_authentication(user_data["id"])
-            if not auth_record:
-                logger.error(f"❌ No authentication record found for user {user_data['id']}")
-                return False, None, "Authentication record not found"
-            
-            auth_data = AuthenticationRecord.model_validate(auth_record)
-            
-            # Check if account is locked
-            if auth_data.locked_until and auth_data.locked_until > datetime.now(timezone.utc):
-                time_until_unlock = auth_data.locked_until - datetime.now(timezone.utc)
-                # Convert time_until_unlock to minutes:seconds format
-                total_seconds = time_until_unlock.total_seconds()
-                minutes = int(total_seconds // 60)
-                seconds = int(total_seconds % 60)
-                time_until_unlock_str = f"{minutes}m {seconds}s"
-                logger.warning(f"🔒 Account is locked for user {login} for another {time_until_unlock_str}.")
-                return False, None, f"Account is temporarily locked due to too many failed attempts. Retry after {time_until_unlock_str}"
-            
-            # Verify password
-            if not self.password_security.verify_password(password, auth_data.password_hash):
-                # Increment failed attempts
-                auth_data.login_attempts += 1
-                
-                # Lock account if too many attempts
-                if auth_data.login_attempts >= SecurityConfig.MAX_LOGIN_ATTEMPTS:
-                    auth_data.locked_until = datetime.now(timezone.utc) + timedelta(
-                        minutes=SecurityConfig.ACCOUNT_LOCKOUT_DURATION_MINUTES
-                    )
-                    logger.warning(f"🔒 Account locked for user {login} after {auth_data.login_attempts} failed attempts")
-                
-                # Update authentication record
-                await self.database.set_authentication(user_data["id"], auth_data.model_dump())
-                
-                logger.warning(f"⚠️ Invalid password for user {login} (attempt {auth_data.login_attempts})")
-                return False, None, "Invalid credentials"
-            
-            # Reset failed attempts on successful login
-            if auth_data.login_attempts > 0:
-                auth_data.login_attempts = 0
-                auth_data.locked_until = None
-                await self.database.set_authentication(user_data["id"], auth_data.model_dump())
-            
-            logger.info(f"✅ Successful authentication for user {login}")
-            return True, user_data, None
-            
-        except Exception as e:
-            logger.error(traceback.format_exc())
-            logger.error(f"❌ Authentication error for user {login}: {e}")
-            return False, None, "Authentication failed"
-    
-    async def check_user_exists(self, email: str, username: str | None = None) -> Tuple[bool, Optional[str]]:
-        """
-        Check if a user already exists with the given email or username
-        
-        Args:
-            email: Email address to check
-            username: Username to check (optional)
-            
-        Returns:
-            Tuple of (exists, conflict_field)
-        """
-        try:
-            # Check email
-            existing_user = await self.database.get_user(email)
-            if existing_user:
-                return True, "email"
-            
-            # Check username if provided
-            if username:
-                existing_user = await self.database.get_user(username)
-                if existing_user:
-                    return True, "username"
-            
-            return False, None
-            
-        except Exception as e:
-            logger.error(f"❌ Error checking user existence: {e}")
-            # In case of error, assume user doesn't exist to avoid blocking creation
-            return False, None
-    
-    async def update_last_login(self, user_id: str):
-        """Update user's last login timestamp"""
-        try:
-            user_data = await self.database.get_user_by_id(user_id)
-            if user_data:
-                user_data["lastLogin"] = datetime.now(timezone.utc).isoformat()
-                await self.database.set_user_by_id(user_id, user_data)
-        except Exception as e:
-            logger.error(f"❌ Error updating last login for user {user_id}: {e}")
-
-# Utility functions for common operations
-def validate_password_strength(password: str) -> Tuple[bool, list]:
-    """
-    Validate password strength
-    
-    Args:
-        password: Password to validate
-        
-    Returns:
-        Tuple of (is_valid, list_of_issues)
-    """
-    issues = []
-    
-    if len(password) < SecurityConfig.PASSWORD_MIN_LENGTH:
-        issues.append(f"Password must be at least {SecurityConfig.PASSWORD_MIN_LENGTH} characters long")
-    
-    if not any(c.isupper() for c in password):
-        issues.append("Password must contain at least one uppercase letter")
-    
-    if not any(c.islower() for c in password):
-        issues.append("Password must contain at least one lowercase letter")
-    
-    if not any(c.isdigit() for c in password):
-        issues.append("Password must contain at least one digit")
-    
-    # Check for special characters
-    special_chars = "!@#$%^&*()_+-=[]{}|;:,.<>?"
-    if not any(c in special_chars for c in password):
-        issues.append("Password must contain at least one special character")
-    
-    return len(issues) == 0, issues
-
-def sanitize_login_input(login: str) -> str:
-    """Sanitize login input (email or username)"""
-    return login.strip().lower() if login else ""
\ No newline at end of file
diff --git a/src/backend/database/manager.py b/src/backend/database/manager.py
index ad0ebda..de1bc13 100644
--- a/src/backend/database/manager.py
+++ b/src/backend/database/manager.py
@@ -1,17 +1,14 @@
-from pydantic import BaseModel, ConfigDict, Field
 from redis.asyncio import (Redis, ConnectionPool)
-from typing import Any, Optional, Dict, List, Optional, TypeGuard, Union
+from typing import Optional, Optional
 import json
 import logging
 import os
-from datetime import datetime, timezone, UTC, timedelta
+from datetime import datetime, UTC
 import asyncio
 from models import (
     # User models
     Candidate, Employer, BaseUser, EvidenceDetail, Guest, Authentication, AuthResponse, SkillAssessment,
 )
-import backstory_traceback as traceback
-from .constants import KEY_PREFIXES
 from .core import RedisDatabase
 
 logger = logging.getLogger(__name__)
diff --git a/src/backend/database/mixins/ai.py b/src/backend/database/mixins/ai.py
index 0589e40..1511342 100644
--- a/src/backend/database/mixins/ai.py
+++ b/src/backend/database/mixins/ai.py
@@ -1,7 +1,5 @@
-from datetime import UTC, datetime, timedelta, timezone
 import logging
-import json
-from typing import List, Optional, Any, Dict, TYPE_CHECKING, Self
+from typing import Optional, Any, Dict
 
 
 from .protocols import DatabaseProtocol
diff --git a/src/backend/database/mixins/analytics.py b/src/backend/database/mixins/analytics.py
index 9b23a8a..99d37f2 100644
--- a/src/backend/database/mixins/analytics.py
+++ b/src/backend/database/mixins/analytics.py
@@ -1,10 +1,9 @@
 import logging
-from typing import Any, Dict, TYPE_CHECKING
+from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from .protocols import DatabaseProtocol
+    pass
 
-from ..constants import KEY_PREFIXES
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/backend/database/mixins/auth.py b/src/backend/database/mixins/auth.py
index cf6fd48..c8c0dd5 100644
--- a/src/backend/database/mixins/auth.py
+++ b/src/backend/database/mixins/auth.py
@@ -1,11 +1,10 @@
 from datetime import datetime, timedelta, timezone
 import json
 import logging
-from typing import Any, Dict, TYPE_CHECKING, List, Optional
+from typing import Any, Dict, List, Optional
 
 from .protocols import DatabaseProtocol
 
-from ..constants import KEY_PREFIXES
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/backend/database/mixins/base.py b/src/backend/database/mixins/base.py
index 41bd32b..dbde059 100644
--- a/src/backend/database/mixins/base.py
+++ b/src/backend/database/mixins/base.py
@@ -1,7 +1,6 @@
-from datetime import UTC, datetime
 import json
 import logging
-from typing import Any, Dict, TYPE_CHECKING, Optional
+from typing import Any, Dict, TYPE_CHECKING
 
 from .protocols import DatabaseProtocol
 
@@ -9,7 +8,7 @@ from ..constants import KEY_PREFIXES
 logger = logging.getLogger(__name__)
 
 if TYPE_CHECKING:
-    from ..core import RedisDatabase
+    pass
 
 class BaseMixin(DatabaseProtocol):
     """Base mixin with core Redis operations and utilities"""
diff --git a/src/backend/database/mixins/chat.py b/src/backend/database/mixins/chat.py
index 0ee95c2..08a0bee 100644
--- a/src/backend/database/mixins/chat.py
+++ b/src/backend/database/mixins/chat.py
@@ -1,6 +1,6 @@
 from datetime import datetime, UTC, timedelta
 import logging
-from typing import Any, Dict, TYPE_CHECKING, List, Optional
+from typing import Any, Dict, List, Optional
 
 from .protocols import DatabaseProtocol
 
diff --git a/src/backend/database/mixins/document.py b/src/backend/database/mixins/document.py
index 04f90c8..d9fd83a 100644
--- a/src/backend/database/mixins/document.py
+++ b/src/backend/database/mixins/document.py
@@ -1,6 +1,6 @@
 from datetime import UTC, datetime
 import logging
-from typing import Any, Dict, TYPE_CHECKING, List, Optional
+from typing import Any, Dict, List, Optional
 
 from .protocols import DatabaseProtocol
 from ..constants import KEY_PREFIXES
diff --git a/src/backend/database/mixins/job.py b/src/backend/database/mixins/job.py
index 39fea6a..a5a9161 100644
--- a/src/backend/database/mixins/job.py
+++ b/src/backend/database/mixins/job.py
@@ -1,6 +1,6 @@
-from datetime import datetime, UTC, timedelta
+from datetime import datetime, UTC
 import logging
-from typing import Any, Dict, TYPE_CHECKING, List, Optional
+from typing import Any, Dict, List, Optional
 
 from .protocols import DatabaseProtocol
 
diff --git a/src/backend/database/mixins/protocols.py b/src/backend/database/mixins/protocols.py
index 06774e7..9b98468 100644
--- a/src/backend/database/mixins/protocols.py
+++ b/src/backend/database/mixins/protocols.py
@@ -3,7 +3,7 @@ from typing import Any, Dict, List, Optional, Protocol, TYPE_CHECKING
 from redis.asyncio import Redis
 
 if TYPE_CHECKING:
-    from database.core import RedisDatabase
+    pass
 
 from models import SkillAssessment
 
diff --git a/src/backend/database/mixins/resume.py b/src/backend/database/mixins/resume.py
index 472cbf9..cb0f6c7 100644
--- a/src/backend/database/mixins/resume.py
+++ b/src/backend/database/mixins/resume.py
@@ -1,6 +1,6 @@
 from datetime import UTC, datetime
 import logging
-from typing import Any, Dict, TYPE_CHECKING, List, Optional
+from typing import Any, Dict, List, Optional
 
 from .protocols import DatabaseProtocol
 from ..constants import KEY_PREFIXES
diff --git a/src/backend/database/mixins/skill.py b/src/backend/database/mixins/skill.py
index 8850910..84b105b 100644
--- a/src/backend/database/mixins/skill.py
+++ b/src/backend/database/mixins/skill.py
@@ -1,11 +1,10 @@
 import json
 import logging
-from typing import Any, Dict, TYPE_CHECKING, Optional
+from typing import Optional
 
 from models import SkillAssessment
 
 from .protocols import DatabaseProtocol
-from ..constants import KEY_PREFIXES
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/backend/database/mixins/user.py b/src/backend/database/mixins/user.py
index 372c281..0c8fbbc 100644
--- a/src/backend/database/mixins/user.py
+++ b/src/backend/database/mixins/user.py
@@ -1,7 +1,7 @@
 from datetime import UTC, datetime, timedelta, timezone
 import logging
 import json
-from typing import List, Optional, Any, Dict, TYPE_CHECKING, Self
+from typing import List, Optional, Any, Dict, Self
 
 
 from .protocols import DatabaseProtocol
diff --git a/src/backend/device_manager.py b/src/backend/device_manager.py
index df17624..7895cb5 100644
--- a/src/backend/device_manager.py
+++ b/src/backend/device_manager.py
@@ -1,4 +1,4 @@
-from fastapi import FastAPI, HTTPException, Depends, Query, Path, Body, status, APIRouter, Request, BackgroundTasks 
+from fastapi import Request 
 from database.manager import RedisDatabase
 import hashlib
 from logger import logger
diff --git a/src/backend/entities/entity_manager.py b/src/backend/entities/entity_manager.py
index e9195bb..0ee8836 100644
--- a/src/backend/entities/entity_manager.py
+++ b/src/backend/entities/entity_manager.py
@@ -1,9 +1,7 @@
-from __future__ import annotations
 import asyncio
-from uuid import uuid4
 import weakref
 from datetime import datetime, timedelta
-from typing import Dict, Optional, Any
+from typing import Dict, Optional
 from contextlib import asynccontextmanager
 from pydantic import BaseModel, Field # type: ignore
 
@@ -46,7 +44,7 @@ class EntityManager(BaseModel):
         self._prometheus_collector = prometheus_collector
         self._database = database
 
-    async def get_entity(self, candidate: Candidate) -> CandidateEntity:
+    async def get_entity(self, candidate: "Candidate") -> CandidateEntity:
         """Get or create CandidateEntity with proper reference tracking"""
         
         # Check if entity exists and is still valid
diff --git a/src/backend/focused_test.py b/src/backend/focused_test.py
index 20abd28..20fa68b 100644
--- a/src/backend/focused_test.py
+++ b/src/backend/focused_test.py
@@ -8,7 +8,7 @@ import sys
 from datetime import datetime
 from models import (
     UserStatus, UserType, SkillLevel, EmploymentType,
-    Candidate, Employer, Location, Skill, AIModelType
+    Candidate, Employer, Location, Skill
 )
 
 
diff --git a/src/backend/generate_types.py b/src/backend/generate_types.py
index 991e057..27755dc 100644
--- a/src/backend/generate_types.py
+++ b/src/backend/generate_types.py
@@ -458,7 +458,6 @@ def is_field_optional(field_info: Any, field_type: Any, debug: bool = False) ->
             except:
                 if debug:
                     print(f"         └─ is_required() failed")
-                pass
         
         # Check the 'required' attribute (Pydantic v1 style)
         if hasattr(field_info, 'required'):
diff --git a/src/backend/helpers/check_serializable.py b/src/backend/helpers/check_serializable.py
index 0cad6a1..5f6ff86 100644
--- a/src/backend/helpers/check_serializable.py
+++ b/src/backend/helpers/check_serializable.py
@@ -1,4 +1,4 @@
-from pydantic import BaseModel, Field 
+from pydantic import BaseModel 
 import json
 from typing import Any, List, Set
 
diff --git a/src/backend/image_generator/profile_image.py b/src/backend/image_generator/profile_image.py
index 2d2aae7..699cd31 100644
--- a/src/backend/image_generator/profile_image.py
+++ b/src/backend/image_generator/profile_image.py
@@ -1,22 +1,13 @@
 from __future__ import annotations
-from datetime import UTC, datetime
-from pydantic import BaseModel, Field 
-from typing import Dict, Literal, Any, AsyncGenerator, Optional
-import inspect
-import random
-import re
-import json
+from pydantic import BaseModel 
+from typing import Any, AsyncGenerator
 import traceback
 import asyncio
 import time
 import os
-import gc
-import tempfile
 import uuid
-import torch 
 import asyncio
 import time
-import json
 from typing import AsyncGenerator
 from threading import Thread
 import queue
@@ -24,7 +15,7 @@ import uuid
 
 from .image_model_cache import ImageModelCache
 
-from models import ApiActivityType, ApiStatusType, Candidate, ChatMessage, ChatMessageError, ChatMessageMetaData, ChatMessageStatus, ChatMessageUser, ChatOptions, ChatSenderType
+from models import ApiActivityType, ApiStatusType, ChatMessage, ChatMessageError, ChatMessageStatus
 from logger import logger
 
 from image_generator.image_model_cache import ImageModelCache
diff --git a/src/backend/main.py b/src/backend/main.py
index 015b1e6..bdb8b19 100644
--- a/src/backend/main.py
+++ b/src/backend/main.py
@@ -1,81 +1,37 @@
-import hashlib
-import time
-import traceback
-from fastapi import FastAPI, HTTPException, Depends, Query, Path, Body, status, APIRouter, Request, BackgroundTasks, File, UploadFile, Form
+from fastapi import FastAPI, Depends, APIRouter, Request
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from fastapi.exceptions import RequestValidationError
-from fastapi.responses import JSONResponse, StreamingResponse, FileResponse
-from fastapi.staticfiles import StaticFiles
+from fastapi.responses import JSONResponse, FileResponse
 from starlette.status import HTTP_422_UNPROCESSABLE_ENTITY
-from functools import wraps
-from typing import Callable, Any, Optional
-from utils.rate_limiter import RateLimiter, RateLimitResult
-
-import schedule
+from typing import Optional
 
 import os
-import shutil
-from enum import Enum
-import uuid
 import defines
-import pathlib
-
-from markitdown import MarkItDown, StreamInfo
-import io                
 
 import uvicorn
-from typing import List, Optional, Dict, Any
-from datetime import datetime, timedelta, UTC
-import uuid
-import jwt
-import os
+from datetime import datetime
 from contextlib import asynccontextmanager
-import redis.asyncio as redis
 import re
-import asyncio
 import signal
 import json
 
-import uuid
-import logging
-from datetime import datetime, timezone, timedelta
-from typing import Dict, Any, Optional
-from pydantic import BaseModel, EmailStr, field_validator, ValidationError
 # Prometheus
-from prometheus_client import Summary
 from prometheus_fastapi_instrumentator import Instrumentator
-from prometheus_client import CollectorRegistry, Counter
-import secrets
-import os
+from prometheus_client import CollectorRegistry
 import backstory_traceback
-from background_tasks import BackgroundTaskManager
 
 # =============================
 # Import custom modules
 # =============================
-from auth_utils import (
-    AuthenticationManager, 
-    validate_password_strength, 
-    sanitize_login_input,
-    SecurityConfig
-)
-import helpers.model_cast as model_cast
-import defines
 from logger import logger
-from database.manager import RedisDatabase, redis_manager, DatabaseManager
-import entities
-from email_service import VerificationEmailRateLimiter, email_service
-from device_manager import DeviceManager
-import agents
 from entities.entity_manager import entity_manager
+from database.manager import redis_manager, DatabaseManager
+from background_tasks import BackgroundTaskManager
 
 # =============================
 # Import utilities
 # =============================
 from utils.dependencies import get_database, set_db_manager
-from utils.responses import create_success_response, create_error_response
-from utils.helpers import filter_and_paginate
 
 # =============================
 # Import route modules
@@ -93,35 +49,6 @@ from routes import (
     users,
 )
 
-# =============================
-# Import Pydantic models
-# =============================
-from models import (
-    # API
-    MOCK_UUID, ApiActivityType, ChatMessageError, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, DocumentMessage, DocumentOptions, Job, JobRequirements, JobRequirementsMessage, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-
-    # User models
-    Candidate, Employer, BaseUserWithType, BaseUser, Guest, Authentication, AuthResponse, CandidateAI,
-    
-    # Job models
-    JobApplication, ApplicationStatus,
-    
-    # Chat models
-    ChatSession, ChatMessage, ChatContext, ChatQuery, ApiStatusType, ChatSenderType, ApiMessageType, ChatContextType,
-    ChatMessageRagSearch,
-
-    # Document models
-    Document, DocumentType, DocumentListResponse, DocumentUpdateRequest, DocumentContentResponse,
-    
-    # Supporting models
-    Location, MFARequest, MFAData, MFARequestResponse, MFAVerifyRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest, Resume, ResumeMessage, Skill, SkillAssessment, SystemInfo, UserType, WorkExperience, Education,
-
-    # Email
-    EmailVerificationRequest
-)
-
-
-# Initialize FastAPI app
 # ============================
 # Startup Event
 # ============================
diff --git a/src/backend/models.py b/src/backend/models.py
index be7277d..494c10a 100644
--- a/src/backend/models.py
+++ b/src/backend/models.py
@@ -1,14 +1,11 @@
-from typing import List, Dict, Optional, Any, Union, Literal, TypeVar, Generic, Annotated
+from typing import List, Dict, Optional, Any, Union, Literal, TypeVar, Annotated
 from pydantic import BaseModel, Field, EmailStr, HttpUrl, model_validator, field_validator, ConfigDict
-from pydantic.types import constr, conint
-from datetime import datetime, date, UTC
+from datetime import datetime, UTC
 from enum import Enum
 import uuid
-from auth_utils import (
-    AuthenticationManager, 
+from utils.auth_utils import (
     validate_password_strength, 
     sanitize_login_input,
-    SecurityConfig
 )
 import defines
 
@@ -823,7 +820,6 @@ class GuestConversionRequest(BaseModel):
     @field_validator('password')
     def validate_password_strength(cls, v):
         # Import here to avoid circular imports
-        from auth_utils import validate_password_strength
         is_valid, issues = validate_password_strength(v)
         if not is_valid:
             raise ValueError('; '.join(issues))
diff --git a/src/backend/rag/markdown_chunker.py b/src/backend/rag/markdown_chunker.py
index 18595e0..b5c2e3d 100644
--- a/src/backend/rag/markdown_chunker.py
+++ b/src/backend/rag/markdown_chunker.py
@@ -1,10 +1,9 @@
 from __future__ import annotations
-from typing import List, Dict, Any, Optional, TypedDict, Tuple
+from typing import List, Dict, Any, Optional, TypedDict
 from markdown_it import MarkdownIt
 from markdown_it.tree import SyntaxTreeNode
 import traceback
 import logging
-import json
 
 import defines
 
diff --git a/src/backend/rag/rag.py b/src/backend/rag/rag.py
index 574a605..4f21272 100644
--- a/src/backend/rag/rag.py
+++ b/src/backend/rag/rag.py
@@ -1,10 +1,9 @@
 from __future__ import annotations
 from pydantic import BaseModel, field_serializer, field_validator, model_validator, Field  # type: ignore
-from typing import List, Optional, Dict, Any, Union
+from typing import List, Optional, Dict, Any
 import os
 import glob
 from pathlib import Path
-import time
 import hashlib
 import asyncio
 import logging
diff --git a/src/backend/routes/admin.py b/src/backend/routes/admin.py
index 24d3c72..52b13a8 100644
--- a/src/backend/routes/admin.py
+++ b/src/backend/routes/admin.py
@@ -2,16 +2,11 @@
 Chat routes
 """
 import json
-import jwt
-import secrets
-import uuid
-from datetime import datetime, timedelta, timezone, UTC
-from typing import (Optional, List, Dict, Any)
+from datetime import datetime, timezone, UTC
 
 from fastapi import (
-    APIRouter, HTTPException, Depends, Body, Request, BackgroundTasks,
-    FastAPI, HTTPException, Depends, Query, Path, Body, status, 
-    APIRouter, Request, BackgroundTasks, File, UploadFile, Form
+    APIRouter, HTTPException, Depends, Body, Request, HTTPException,
+    Depends, Query, Path, Body, APIRouter, Request
 )
 
 from fastapi.responses import JSONResponse
diff --git a/src/backend/routes/auth.py b/src/backend/routes/auth.py
index 4974843..312d4f4 100644
--- a/src/backend/routes/auth.py
+++ b/src/backend/routes/auth.py
@@ -7,13 +7,12 @@ import secrets
 import uuid
 import os
 from datetime import datetime, timedelta, timezone, UTC
-from typing import Any, Dict, Optional
+from typing import Any, Dict
 
-from fastapi import APIRouter, HTTPException, Depends, Body, Request, BackgroundTasks
+from fastapi import APIRouter, Depends, Body, Request, BackgroundTasks
 from fastapi.responses import JSONResponse
 from pydantic import BaseModel, EmailStr, ValidationError, field_validator
 
-from auth_utils import AuthenticationManager, SecurityConfig
 import backstory_traceback as backstory_traceback
 from utils.rate_limiter import RateLimiter
 from database.manager import RedisDatabase, redis_manager
@@ -21,23 +20,19 @@ from device_manager import DeviceManager
 from email_service import VerificationEmailRateLimiter, email_service
 from logger import logger
 from models import (
-    LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, ResendVerificationRequest,
+    LoginRequest, CreateCandidateRequest, Candidate,
+    Employer, Guest, AuthResponse, MFARequest,
+    MFAData, MFAVerifyRequest, ResendVerificationRequest,
     MFARequestResponse, MFARequestResponse
 )
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist
+    get_current_admin, get_database, get_current_user, create_access_token
 )
 from utils.responses import create_success_response, create_error_response
 from utils.rate_limiter import get_rate_limiter
-from auth_utils import (
-    AuthenticationManager, 
+from utils.auth_utils import (
+    AuthenticationManager, SecurityConfig,
     validate_password_strength, 
-    sanitize_login_input,
-    SecurityConfig
 )
 
 # Create router for authentication endpoints
diff --git a/src/backend/routes/candidates.py b/src/backend/routes/candidates.py
index bd9aaca..985464e 100644
--- a/src/backend/routes/candidates.py
+++ b/src/backend/routes/candidates.py
@@ -5,43 +5,38 @@ import json
 import pathlib
 import re
 import shutil
-import jwt
 import secrets
 import uuid
 import os
-from datetime import datetime, timedelta, timezone, UTC
+from datetime import datetime, timezone, UTC
 from typing import Any, Dict, List, Optional
 
-from fastapi import APIRouter, File, Form, HTTPException, Depends, Body, Path, Query, Request, BackgroundTasks, UploadFile
+from fastapi import APIRouter, File, Form, Depends, Body, Path, Query, BackgroundTasks, UploadFile
 from fastapi.responses import FileResponse, JSONResponse, StreamingResponse
-from pydantic import BaseModel, ValidationError
+from pydantic import ValidationError
 
-from auth_utils import AuthenticationManager, SecurityConfig
 import backstory_traceback as backstory_traceback
 from agents.generate_resume import GenerateResume
 import agents.base as agents
-from utils.rate_limiter import RateLimiter, rate_limited
+from utils.rate_limiter import rate_limited
 from utils.helpers import filter_and_paginate, get_document_type_from_filename, get_skill_cache_key, get_requirements_list
-from database.manager import RedisDatabase, redis_manager
-from device_manager import DeviceManager
-from email_service import VerificationEmailRateLimiter, email_service
+from database.manager import RedisDatabase
+from email_service import email_service
 from logger import logger
 from models import (
-    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, CandidateAI, ChatContextType, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, RAGDocumentRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse, SkillAssessment, UserType
+    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, CandidateAI, ChatContextType, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, CreateCandidateRequest, Candidate, RAGDocumentRequest,
+    RagContentMetadata, RagContentResponse, SkillAssessment, UserType
 )
 from utils.dependencies import (
     get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist, prometheus_collector
+    prometheus_collector
 )
 from utils.rate_limiter import rate_limited
 from utils.responses import create_paginated_response, create_success_response, create_error_response
 import utils.llm_proxy as llm_manager
 import entities.entity_manager as entities
 import defines
+from utils.auth_utils import AuthenticationManager
 
 # Create router for authentication endpoints
 router = APIRouter(prefix="/candidates", tags=["candidates"])
diff --git a/src/backend/routes/chat.py b/src/backend/routes/chat.py
index 9cf614d..da7f220 100644
--- a/src/backend/routes/chat.py
+++ b/src/backend/routes/chat.py
@@ -2,29 +2,21 @@
 Chat routes
 """
 import json
-import jwt
-import secrets
 import uuid
-from datetime import datetime, timedelta, timezone, UTC
-from typing import (Optional, List, Dict, Any)
+from datetime import datetime, UTC
+from typing import (Dict, Any)
 
 from fastapi import (
-    APIRouter, HTTPException, Depends, Body, Request, BackgroundTasks,
-    FastAPI, HTTPException, Depends, Query, Path, Body, status, 
-    APIRouter, Request, BackgroundTasks, File, UploadFile, Form
+    APIRouter, Depends, Body, Depends, Query, Path,
+    Body, APIRouter
 )
 
 from fastapi.responses import JSONResponse
-from pydantic import ValidationError
 
-from auth_utils import AuthenticationManager, SecurityConfig
-from database.manager import RedisDatabase, redis_manager
-from device_manager import DeviceManager
-from email_service import email_service
+from database.manager import RedisDatabase
 from logger import logger
 from utils.dependencies import (
-    get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist
+    get_database, get_current_user, get_current_user_or_guest
 )
 from utils.responses import (
     create_success_response, create_error_response, create_paginated_response
diff --git a/src/backend/routes/debug.py b/src/backend/routes/debug.py
index 4285ba7..286719c 100644
--- a/src/backend/routes/debug.py
+++ b/src/backend/routes/debug.py
@@ -4,36 +4,15 @@ Debugging Endpoints
 import json
 from datetime import datetime, UTC
 
-from fastapi import APIRouter, Depends, Body, Path
+from fastapi import APIRouter, Depends, Path
 from fastapi.responses import JSONResponse
-from pydantic import BaseModel, EmailStr, ValidationError, field_validator
 
-from auth_utils import AuthenticationManager, SecurityConfig
-import backstory_traceback as backstory_traceback
-from utils.rate_limiter import RateLimiter
-from database.manager import RedisDatabase, redis_manager
-from device_manager import DeviceManager
-from email_service import VerificationEmailRateLimiter, email_service
+from database.manager import RedisDatabase
 from logger import logger
-from models import (
-    LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse
-)
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist
+    get_current_admin, get_database
 )
 from utils.responses import create_success_response, create_error_response
-from utils.rate_limiter import get_rate_limiter
-from auth_utils import (
-    AuthenticationManager, 
-    validate_password_strength, 
-    sanitize_login_input,
-    SecurityConfig
-)
 
 # Create router for authentication endpoints
 router = APIRouter(prefix="/auth", tags=["authentication"])
diff --git a/src/backend/routes/employers.py b/src/backend/routes/employers.py
index c2f7395..c5529ae 100644
--- a/src/backend/routes/employers.py
+++ b/src/backend/routes/employers.py
@@ -1,43 +1,24 @@
 """
 Employer Routes
 """
-import asyncio
-import io
-import json
-import pathlib
-import re
-import shutil
-import jwt
 import secrets
 import uuid
-import os
-from datetime import datetime, timedelta, timezone, UTC
-from typing import Any, Dict, List, Optional
+from datetime import datetime, timezone
 
-from fastapi import APIRouter, File, Form, HTTPException, Depends, Body, Path, Query, Request, BackgroundTasks, UploadFile
-from fastapi.responses import FileResponse, JSONResponse, StreamingResponse
-from markitdown import MarkItDown, StreamInfo
-from pydantic import BaseModel, ValidationError
+from fastapi import APIRouter, Depends, BackgroundTasks
+from fastapi.responses import JSONResponse
 
-from auth_utils import AuthenticationManager
-from utils.helpers import create_job_from_content, filter_and_paginate, get_document_type_from_filename, get_skill_cache_key, get_requirements_list
-from database.manager import RedisDatabase, redis_manager
+from database.manager import RedisDatabase
 from logger import logger
 from models import (
-    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, CandidateAI, ChatContextType, ChatMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, JobRequirementsMessage, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, RAGDocumentRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse, Resume, ResumeMessage, SkillAssessment, UserType
+    CreateEmployerRequest
 )
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist, prometheus_collector
+    get_database
 )
-from utils.responses import create_paginated_response, create_success_response, create_error_response
-import utils.llm_proxy as llm_manager
-import entities.entity_manager as entities
+from utils.responses import create_success_response, create_error_response
 from email_service import email_service
+from utils.auth_utils import AuthenticationManager
 
 # Create router for job endpoints
 router = APIRouter(prefix="/employers", tags=["employers"])
diff --git a/src/backend/routes/jobs.py b/src/backend/routes/jobs.py
index 9d6187e..3d80160 100644
--- a/src/backend/routes/jobs.py
+++ b/src/backend/routes/jobs.py
@@ -6,35 +6,25 @@ import io
 import json
 import pathlib
 import re
-import shutil
-import jwt
-import secrets
 import uuid
-import os
-from datetime import datetime, timedelta, timezone, UTC
-from typing import Any, Dict, List, Optional
+from datetime import datetime, UTC
+from typing import Any, Dict, Optional
 
-from fastapi import APIRouter, File, Form, HTTPException, Depends, Body, Path, Query, Request, BackgroundTasks, UploadFile
-from fastapi.responses import FileResponse, JSONResponse, StreamingResponse
+from fastapi import APIRouter, File, Depends, Body, Path, Query, UploadFile
+from fastapi.responses import JSONResponse, StreamingResponse
 from markitdown import MarkItDown, StreamInfo
 
 import backstory_traceback as backstory_traceback
 import defines
-from agents.generate_resume import GenerateResume
 from agents.base import CandidateEntity
-from utils.helpers import create_job_from_content, filter_and_paginate, get_document_type_from_filename, get_skill_cache_key, get_requirements_list
-from database.manager import RedisDatabase, redis_manager
+from utils.helpers import create_job_from_content, filter_and_paginate, get_document_type_from_filename
+from database.manager import RedisDatabase
 from logger import logger
 from models import (
-    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, CandidateAI, ChatContextType, ChatMessage, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, JobRequirementsMessage, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, RAGDocumentRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse, Resume, ResumeMessage, SkillAssessment, UserType
+    MOCK_UUID, ApiActivityType, ApiStatusType, ChatContextType, ChatMessage, ChatMessageError, ChatMessageStatus, DocumentType, Job, JobRequirementsMessage, Candidate, Employer
 )
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist, prometheus_collector
+    get_current_admin, get_database, get_current_user
 )
 from utils.responses import create_paginated_response, create_success_response, create_error_response
 import utils.llm_proxy as llm_manager
diff --git a/src/backend/routes/resumes.py b/src/backend/routes/resumes.py
index 0ce1403..9b0220c 100644
--- a/src/backend/routes/resumes.py
+++ b/src/backend/routes/resumes.py
@@ -2,38 +2,22 @@
 Resume Routes
 """
 import json
-import pathlib
-import re
-import shutil
-import jwt
-import secrets
-import uuid
-import os
-from datetime import datetime, timedelta, timezone, UTC
-from typing import Any, Dict, List, Optional
+from datetime import datetime, UTC
+from typing import List
 
-from fastapi import APIRouter, File, Form, HTTPException, Depends, Body, Path, Query, Request, BackgroundTasks, UploadFile
-from fastapi.responses import FileResponse, JSONResponse, StreamingResponse
-from pydantic import BaseModel, ValidationError
+from fastapi import APIRouter, HTTPException, Depends, Body, Path, Query
+from fastapi.responses import StreamingResponse
 
 import backstory_traceback as backstory_traceback
-from utils.helpers import filter_and_paginate, get_document_type_from_filename, get_skill_cache_key, get_requirements_list
-from database.manager import RedisDatabase, redis_manager
+from database.manager import RedisDatabase
 from logger import logger
 from models import (
-    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, CandidateAI, ChatContextType, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, RAGDocumentRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse, Resume, ResumeMessage, SkillAssessment, UserType
+    MOCK_UUID, ChatMessageError, Job, Candidate, Resume, ResumeMessage
 )
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist, prometheus_collector
+    get_database, get_current_user
 )
-from utils.responses import create_paginated_response, create_success_response, create_error_response
-import utils.llm_proxy as llm_manager
-from utils.rate_limiter import get_rate_limiter
+from utils.responses import create_success_response
         
 # Create router for authentication endpoints
 router = APIRouter(prefix="/resumes", tags=["resumes"])
diff --git a/src/backend/routes/system.py b/src/backend/routes/system.py
index 5b2f473..b13eb0e 100644
--- a/src/backend/routes/system.py
+++ b/src/backend/routes/system.py
@@ -1,39 +1,11 @@
 """
 Health/system routes
 """
-import json
-from datetime import datetime, UTC
 
-from fastapi import APIRouter, Depends, Body, HTTPException, Path, Request
-from fastapi.responses import JSONResponse
-from pydantic import BaseModel, EmailStr, ValidationError, field_validator
+from fastapi import APIRouter, Depends, HTTPException, Request
 
-from auth_utils import AuthenticationManager, SecurityConfig
-import backstory_traceback as backstory_traceback
-from utils.rate_limiter import RateLimiter
-from database.manager import RedisDatabase, redis_manager, Redis
-from device_manager import DeviceManager
-from email_service import VerificationEmailRateLimiter, email_service
-from logger import logger
-from models import (
-    LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse
-)
-from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist
-)
-from utils.responses import create_success_response, create_error_response
-from utils.rate_limiter import get_rate_limiter
-from auth_utils import (
-    AuthenticationManager, 
-    validate_password_strength, 
-    sanitize_login_input,
-    SecurityConfig
-)
+from database.manager import redis_manager, Redis
+from utils.responses import create_success_response
 
 # Create router for authentication endpoints
 router = APIRouter(prefix="/system", tags=["system"])
diff --git a/src/backend/routes/users.py b/src/backend/routes/users.py
index 29ce87c..aca453b 100644
--- a/src/backend/routes/users.py
+++ b/src/backend/routes/users.py
@@ -1,38 +1,19 @@
 """
 Job Routes
 """
-import io
-import json
-import pathlib
-import re
-import shutil
-import jwt
-import secrets
-import uuid
-import os
-from datetime import datetime, timedelta, timezone, UTC
-from typing import Any, Dict, List, Optional
 
-from fastapi import APIRouter, File, Form, HTTPException, Depends, Body, Path, Query, Request, BackgroundTasks, UploadFile
-from fastapi.responses import FileResponse, JSONResponse, StreamingResponse
+from fastapi import APIRouter, Depends, Path
+from fastapi.responses import JSONResponse
 
-from database.manager import RedisDatabase, redis_manager
-from device_manager import DeviceManager
-from email_service import VerificationEmailRateLimiter, email_service
+from database.manager import RedisDatabase
 from logger import logger
 from models import (
-    MOCK_UUID, ApiActivityType, ApiMessageType, ApiStatusType, BaseUserWithType, CandidateAI, ChatContextType, ChatMessageError, ChatMessageRagSearch, ChatMessageResume, ChatMessageSkillAssessment, ChatMessageStatus, ChatMessageStreaming, ChatMessageUser, ChatSession, Document, DocumentContentResponse, DocumentListResponse, DocumentMessage, DocumentOptions, DocumentType, DocumentUpdateRequest, Job, JobRequirements, LoginRequest, CreateCandidateRequest, CreateEmployerRequest,
-    Candidate, Employer, Guest, AuthResponse,
-    MFARequest, MFAData, MFAVerifyRequest,
-    EmailVerificationRequest, RAGDocumentRequest, RagContentMetadata, RagContentResponse, ResendVerificationRequest,
-    MFARequestResponse, MFARequestResponse, Resume, ResumeMessage, SkillAssessment, UserType
+    BaseUserWithType
 )
 from utils.dependencies import (
-    get_current_admin, get_database, get_current_user, get_current_user_or_guest,
-    create_access_token, verify_token_with_blacklist, prometheus_collector
+    get_database
 )
-from utils.rate_limiter import get_rate_limiter
-from utils.responses import create_paginated_response, create_success_response, create_error_response
+from utils.responses import create_success_response, create_error_response
 
 # Create router for job endpoints
 router = APIRouter(prefix="/users", tags=["users"])
diff --git a/src/backend/tools/basetools.py b/src/backend/tools/basetools.py
index d90360c..04170b5 100644
--- a/src/backend/tools/basetools.py
+++ b/src/backend/tools/basetools.py
@@ -1,11 +1,10 @@
 import os
-from pydantic import BaseModel, Field, model_validator  
-from typing import List, Optional, Generator, ClassVar, Any, Dict
+from pydantic import BaseModel  
+from typing import List, Optional, Any, Dict
 from datetime import datetime
 from typing import (
     Any,
 )
-from typing_extensions import Annotated
 
 from bs4 import BeautifulSoup  
 
diff --git a/src/backend/utils/__init__.py b/src/backend/utils/__init__.py
index 7752e2e..7fde0bd 100644
--- a/src/backend/utils/__init__.py
+++ b/src/backend/utils/__init__.py
@@ -1,54 +1,3 @@
 """
 Utils package - Utility functions and dependencies
-"""
-
-# Import commonly used utilities for easy access
-from .dependencies import (
-    get_database,
-    get_current_user, 
-    get_current_user_or_guest,
-    get_current_admin,
-    create_access_token,
-    verify_token_with_blacklist
-)
-
-from .responses import (
-    create_success_response,
-    create_error_response,
-    create_paginated_response
-)
-
-from .helpers import (
-    filter_and_paginate,
-    stream_agent_response,
-    get_candidate_files_dir,
-    get_document_type_from_filename,
-    get_skill_cache_key
-)
-
-from .rate_limiter import (
-    get_rate_limiter
-)
-
-__all__ = [
-    # Dependencies
-    "get_database",
-    "get_current_user", 
-    "get_current_user_or_guest",
-    "get_current_admin",
-    "get_rate_limiter",
-    "create_access_token",
-    "verify_token_with_blacklist",
-    
-    # Responses
-    "create_success_response",
-    "create_error_response", 
-    "create_paginated_response",
-    
-    # Helpers
-    "filter_and_paginate",
-    "stream_agent_response",
-    "get_candidate_files_dir",
-    "get_document_type_from_filename",
-    "get_skill_cache_key"
-]
\ No newline at end of file
+"""
\ No newline at end of file
diff --git a/src/backend/utils/auth_utils.py b/src/backend/utils/auth_utils.py
index 0a31dac..d2aa785 100644
--- a/src/backend/utils/auth_utils.py
+++ b/src/backend/utils/auth_utils.py
@@ -3,7 +3,7 @@
 Secure Authentication Utilities
 Provides password hashing, verification, and security features
 """
-
+from __future__ import annotations
 import traceback
 import bcrypt 
 import secrets
diff --git a/src/backend/utils/dependencies.py b/src/backend/utils/dependencies.py
index 4941f8a..a72de8b 100644
--- a/src/backend/utils/dependencies.py
+++ b/src/backend/utils/dependencies.py
@@ -4,7 +4,7 @@ Shared dependencies for FastAPI routes
 from __future__ import annotations
 import jwt
 import os
-from datetime import datetime, timedelta, timezone, UTC
+from datetime import datetime, timedelta, UTC
 from typing import Optional
 
 from fastapi import HTTPException, Depends
diff --git a/src/backend/utils/helpers.py b/src/backend/utils/helpers.py
index a58ed93..ae573b8 100644
--- a/src/backend/utils/helpers.py
+++ b/src/backend/utils/helpers.py
@@ -4,7 +4,6 @@ Helper functions shared across routes
 import asyncio
 import hashlib
 import json
-import os
 import pathlib
 from datetime import datetime, UTC
 from typing import Any, Dict, List, Optional, Tuple
@@ -108,7 +107,6 @@ async def stream_agent_response(chat_agent, user_message, chat_session_data=None
         final_message = None
         
         import utils.llm_proxy as llm_manager
-        import agents
         
         async for generated_message in chat_agent.generate(
             llm=llm_manager.get_llm(),
@@ -203,7 +201,7 @@ def get_skill_cache_key(candidate_id: str, skill: str) -> str:
 
 async def reformat_as_markdown(database, candidate_entity, content: str):
     """Reformat content as markdown using AI agent"""
-    from models import ChatContextType, MOCK_UUID, ApiStatusType, ChatMessageError, ChatMessageStatus, ApiActivityType, ChatMessage
+    from models import ChatContextType, MOCK_UUID, ChatMessageError, ChatMessageStatus, ApiActivityType, ChatMessage
     import utils.llm_proxy as llm_manager
     
     chat_agent = candidate_entity.get_or_create_agent(agent_type=ChatContextType.JOB_REQUIREMENTS)
diff --git a/src/backend/utils/llm_proxy.py b/src/backend/utils/llm_proxy.py
index b756c0b..f783b09 100644
--- a/src/backend/utils/llm_proxy.py
+++ b/src/backend/utils/llm_proxy.py
@@ -3,7 +3,6 @@ from typing import Dict, List, Any, AsyncGenerator, Optional, Union
 from pydantic import BaseModel, Field 
 from enum import Enum
 import asyncio
-import json
 from dataclasses import dataclass
 import os
 import defines
@@ -145,7 +144,6 @@ class BaseLLMAdapter(ABC):
         **kwargs
     ) -> Union[ChatResponse, AsyncGenerator[ChatResponse, None]]:
         """Send chat messages and get response"""
-        pass
     
     @abstractmethod
     async def generate(
@@ -156,7 +154,6 @@ class BaseLLMAdapter(ABC):
         **kwargs
     ) -> Union[ChatResponse, AsyncGenerator[ChatResponse, None]]:
         """Generate text from prompt"""
-        pass
     
     @abstractmethod
     async def embeddings(
@@ -166,12 +163,10 @@ class BaseLLMAdapter(ABC):
         **kwargs
     ) -> EmbeddingResponse:
         """Generate embeddings for input text(s)"""
-        pass
     
     @abstractmethod
     async def list_models(self) -> List[str]:
         """List available models"""
-        pass
 
 class OllamaAdapter(BaseLLMAdapter):
     """Adapter for Ollama with enhanced statistics"""
diff --git a/src/backend/utils/rate_limiter.py b/src/backend/utils/rate_limiter.py
index eee96a2..267698b 100644
--- a/src/backend/utils/rate_limiter.py
+++ b/src/backend/utils/rate_limiter.py
@@ -3,10 +3,8 @@ Rate limiting utilities for guest and authenticated users
 """
 from __future__ import annotations
 from functools import wraps
-import json
-import time
 from datetime import datetime, timedelta, UTC
-from typing import Callable, Dict, Optional, Tuple, Any
+from typing import Callable, Dict, Optional, Any
 from fastapi import Depends, HTTPException, Request
 from pydantic import BaseModel # type: ignore
 from database.manager import RedisDatabase