Posts on FastAPI — the async-first Python framework that turned type hints into a superpower. From getting started to wiring up SQLAlchemy, JWT auth, testing, and deploying to production.
Practical FastAPI DI: scoped dependencies, async DB sessions, auth chains, request-scoped state, lifespan resources, and where DI starts to bite.
Choosing background processing for FastAPI: BackgroundTasks for fire-and-forget, ARQ for Redis-backed simplicity, Celery for ecosystem, Dramatiq for ergonomics.
Practical FastAPI streaming: SSE for one-way real-time, NDJSON for streamed JSON, LLM token streaming, backpressure handling, and reconnect patterns.
A complete, opinionated production layout for FastAPI in 2026. Pydantic v2, async SQLAlchemy 2.0, Alembic, dependency injection, structured errors, settings, logging, and the project skeleton that survives the first 50 endpoints.
A practical guide to testing FastAPI: pytest configuration, async HTTP client, transactional database isolation per test, and fixtures for authentication.
An end-to-end JWT auth walkthrough for FastAPI: bcrypt password hashing, access + refresh tokens, dependency-injected current user, and how to avoid common pitfalls.
Build a production-ready FastAPI + SQLAlchemy 2.0 + PostgreSQL stack with async sessions, dependency-injected DB access, and Alembic migrations.
A practical, hands-on introduction to FastAPI covering type-driven routing, Pydantic validation, async I/O, dependency injection, and a sane project layout.