Choose Python web framework architecture

Define thin-adapter pattern for Python web backends with type safety

Backend teams building typed, testable services where HTTP is an adapter, not the core.

• · Framework choice (Django/FastAPI)
• · Validation and service design

• · Layered architecture diagram
• · Framework comparison table

• · Django ORM + DRF
• · FastAPI + Pydantic

• · Relational or document persistence model chosen

• · Framework-aware logic leaks into service layer
• · Unvalidated ORM objects cross boundary

• · Request→Boundary→Service→Persistence diagram
• · Django vs FastAPI decision matrix