FastAPI is a modern, high-performance Python web framework for building APIs with automatic validation and docs. Built on Starlette and Pydantic, it is async-first and type-driven.
Overview
FastAPI uses Python type hints to validate requests, serialize responses, and generate interactive OpenAPI/Swagger documentation automatically. Its ASGI foundation makes it fully asynchronous and fast, while Pydantic models give you robust data validation with minimal boilerplate.
How I Use FastAPI
I build production backends with FastAPI — designing typed endpoints, Pydantic schemas, and async routes that talk to PostgreSQL (via SQLAlchemy 2.0) and Redis. I add token-based auth, structure background jobs with worker queues and schedulers, and use the auto-generated docs to keep API contracts clear across the team.
Why FastAPI?
FastAPI combines speed, type safety, and developer experience. Automatic validation and docs remove an entire category of glue code, the async model handles concurrent workloads well, and the Pydantic-driven design keeps data correct from request to database.
