FastAPI Backend, From Zero to Production-Ready API

FastAPI is the go-to for AI/ML backends and modern Python APIs. I'll walk you through building a production-grade backend: project structure, SQLAlchemy ORM with PostgreSQL, JWT authentication, role-based access control, Redis caching, and API documentation. Based on real MVP work I've shipped including an AI interview automation platform where these patterns improved response times by 45%. You get the architecture, not just the code.