Practice real frameworks

Hands-on FastAPI exercises that mirror real engineering work — from core fundamentals to the patterns interviewers actually probe. Every challenge is graded automatically and mapped to a skill below.

FastAPI is a modern, fast (high-performance) web framework for building APIs with Python 3.6+ based on standard Python type hints. It is built on Starlette for the web parts and Pydantic for the data parts. FastAPI automatically generates OpenAPI and JSON Schema documentation, making it easy to create APIs with minimal code. It supports asynchronous programming, which allows for high concurrency and performance.