Mini Amazon - Cart & Order Backend System
Designed and implemented a transactional e-commerce backend over a 1,000+ product PostgreSQL database, supporting 50+ concurrent checkout simulations without failure. Built 10+ RESTful API endpoints for cart, checkout, and order management, achieving full multi-step purchase workflows with < 200ms average query latency through indexed queries and optimized joins. Implemented atomic transaction logic for inventory updates and balance transfers and reduced relational schema from 6 to 4 tables while preserving historical prices.
PythonFlaskPostgreSQLPoetryJinja2HTML5CSS3JavaScript