Backend API with FastAPI, PostgreSQL & Docker
Production-ready backend with authentication, CRUD operations and voting system
Project Overview
Built a production-ready backend API using FastAPI with PostgreSQL as the database, containerized with Docker. The API implements user authentication with JWT tokens, CRUD operations for posts, and a voting system. The application follows MVC architecture with proper separation of concerns and includes comprehensive request/response validation using Pydantic models.
Key Features
1. User Authentication
Secure authentication system implementation:
- JWT token-based authentication using python-jose
- Password hashing with bcrypt
- Protected routes with dependency injection
- Token expiration and refresh mechanism
- User registration and login endpoints
2. Post Management
Complete CRUD functionality for posts:
- Create, Read, Update and Delete operations
- Ownership-based permissions
- Pagination and filtering support
- Data validation with Pydantic models
- Consistent response models
3. Voting System
Interactive voting mechanism:
- Upvote/downvote posts
- Prevent duplicate votes
- Real-time vote count updates
- Integrated with post retrieval
4. Database Integration
PostgreSQL database setup:
- SQLAlchemy ORM for database operations
- Psycopg2 as PostgreSQL adapter
- Database models with relationships
- Automatic schema migrations
- Connection pooling
5. Docker Deployment
Containerized application setup:
- Multi-container Docker environment
- Persistent PostgreSQL volumes
- Environment variables for configuration
- Single command deployment
- Production-ready setup
Technical Implementation
API Design
RESTful API implementation details:
- Resource-oriented endpoints
- Proper HTTP status codes
- Query parameters for filtering
- Request/Response validation
- Error handling middleware
Code Organization
Modular project structure:
- Separate routers for different resources
- Dependency injection for reusable logic
- Database models in separate module
- Configuration management
- Type hints throughout the codebase
Security
Security measures implemented:
- Environment variables for secrets
- Password hashing
- CORS configuration
Key Achievements
- Designed and implemented a production-ready backend API
- Implemented secure JWT authentication system
- Created comprehensive CRUD operations for posts
- Developed interactive voting system
- Containerized application with Docker and Docker Compose
- Configured PostgreSQL with proper persistence
- Followed best practices for FastAPI development
Work Samples
API Screenshots
5 images