FastAPI & GraphQL E-Commerce API – Secure, Scalable, and High-Performance Backend
About This Project
A modern e-commerce frontend asks its backend for very specific slices of data — and a rigid REST API makes that slow and chatty. I built a FastAPI-based GraphQL backend for a high-traffic e-commerce application, designed for speed, secure transactions, and clean data flow.
The approach: a modular FastAPI architecture for maintainability and easy frontend integration, GraphQL for flexible querying that eliminates over-fetching, and a security layer with JWT auth, CSRF protection, and password-strength validation. I built out the core commerce features — cart, product CRUD, order processing — and tuned the PostgreSQL queries to stay fast under load.
The impact was measurable: roughly 40% faster API response times than the equivalent REST setup, and far simpler frontend integration thanks to GraphQL's single-endpoint model — a production-ready backend built to scale with the business.
Stack: FastAPI, GraphQL, PostgreSQL, JWT, Python, backend development.
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