Summary
- Implement proven backend architecture patterns for maintainable, testable, and scalable systems.
- Covers three core patterns: Clean Architecture (layered dependency inward), Hexagonal Architecture (ports and adapters), and Domain-Driven Design (bounded contexts, aggregates, value objects) Includes complete directory structures, code examples, and implementation patterns for Python backends using FastAPI, asyncpg, and similar frameworks Demonstrates practical separation of concerns: domain entities, use cases, adapters, repositories, and controllers with clear dependency flows Provides tactical DDD patterns including value objects, entities, aggregates, domain events, and repositories for modeling complex business logic