Microservices Federation (GraphQL, Python and Apollo)

The article demonstrates how to build a microservices architecture using Apollo Federation 2 to compose multiple Python-based GraphQL services into a unified supergraph. Each service (User, Product, Order) is built with FastAPI and Strawberry GraphQL, backed by isolated PostgreSQL databases within a single container, and orchestrated via Docker Compose. The Gateway composes the individual service schemas transparently, allowing clients to query a single API endpoint.