E-Commerce Platform
A high-performance e-commerce single-page application built with React and FastAPI. Features async Python backend for handling payment processing and high-traffic loads, comprehensive product catalog with advanced filtering, real-time inventory tracking, secure Stripe integration with webhooks, and responsive TypeScript frontend for optimal user experience.
Challenge
Building a scalable e-commerce platform that handles complex product catalogs and payment processing while maintaining fast performance under high concurrent user loads and ensuring secure transactions.
Solution
Implemented FastAPI with async/await patterns for non-blocking payment processing, utilized Pydantic schemas for data validation, built React SPA with TypeScript for type safety, integrated Stripe webhooks with async handlers, deployed with Docker, and used PostgreSQL with asyncpg for async database operations.
Implementation Details
FastAPI Async Architecture
Built RESTful API using FastAPI with async/await patterns for non-blocking I/O operations. Implemented Pydantic models for request/response validation ensuring type safety. Created async route handlers for product catalog, orders, and payments. Used dependency injection for database sessions and authentication. Applied automatic API documentation with OpenAPI/Swagger.
Async Database with PostgreSQL
Configured PostgreSQL with asyncpg driver for async database operations. Implemented SQLAlchemy 2.0 with async support for ORM functionality. Created database connection pooling for efficient resource usage. Built Alembic migrations for schema version control. Applied database indexes on product name, category, and price for search performance.
Stripe Async Payment Integration
Integrated Stripe Payment Intents API with async webhook handlers in FastAPI. Implemented background tasks with asyncio for payment confirmation processing. Built idempotency keys to prevent duplicate charges. Created order reconciliation system syncing payment status asynchronously. Applied comprehensive error handling with user-friendly responses.
React SPA Frontend
Built single-page application with React 18 and TypeScript for type safety. Implemented Redux Toolkit for state management with normalized data structure. Used React Router for client-side navigation. Created API service layer with axios for backend communication. Applied React Query for efficient data fetching and caching. Built responsive UI with Tailwind CSS.
Real-Time Features & Caching
Implemented WebSocket connection with FastAPI for real-time inventory updates. Used Redis for caching product catalog and session data reducing database load by 60%. Applied optimistic UI updates in React for better user experience. Created background tasks with FastAPI BackgroundTasks for async email notifications.
Testing & Performance
Achieved 75%+ test coverage using pytest with pytest-asyncio for async testing. Implemented unit tests for business logic, integration tests for API endpoints. Used httpx for async API testing. Applied load testing with locust. Optimized React bundle with code splitting and lazy loading. Achieved 95+ Lighthouse performance score.
Key Results & Impact
Achieved 95+ Lighthouse performance score with React SPA optimization
Maintained 75%+ test coverage with pytest and pytest-asyncio
Built async payment processing with FastAPI reducing response time by 50%
Implemented real-time inventory updates with WebSocket
Reduced database load by 60% with Redis caching strategy
Deployed with Docker for consistent development and production environments