I will build a fastapi rest API with postgresql and docker

I will build or extend a Python FastAPI backend for a web app, mobile app, automation workflow, or documented third-party service.

I can implement REST endpoints, webhooks, request validation, authentication, PostgreSQL storage, background tasks, and external API integrations. Delivery includes readable source code, environment-variable configuration, error handling, and endpoint documentation.

I begin by defining request, response, and failure cases for each endpoint. Each package covers one backend service or one bounded module within its listed limits.

A complete SaaS platform, frontend application, production infrastructure management, security certification, and paid service accounts require a separate scope. I do not reverse-engineer private APIs or bypass access controls.

Please share API documentation and the expected data flow before ordering if the integration is complex.