architecture-patterns

To design backend architecture with clear bounded contexts, you apply Domain-Driven Design to model complex domains and enforce strict dependency rules. This isolates business logic into testable aggregates and defines repeatable practices for structuring new services.

Clean Architecture focuses on inward dependencies to separate concerns and protect independent business rules, while Hexagonal Architecture uses ports and adapters to isolate the core domain from external frameworks and drivers. Both patterns reduce coupling and increase testability.

Refactoring a monolith using Domain-Driven Design involves defining bounded contexts and establishing clear layered boundaries. By enforcing dependency rules and modeling domain logic through aggregates and domain events, you can incrementally decouple modules and reduce system coupling.

You need Hexagonal Architecture ports and adapters when you want to isolate your core business logic from external frameworks, databases, or drivers. This approach ensures your domain logic remains testable and independent of infrastructure changes.

Yes, Clean Architecture works seamlessly with Domain-Driven Design. You can use Clean Architecture's inward dependency rules to protect the domain core, while leveraging Domain-Driven Design aggregates, value objects, and domain events to model complex business logic.

The limitations of using bounded contexts and aggregates include the overhead of defining strict interface boundaries and mapping complex domain events. While these patterns reduce coupling, they require careful upfront modeling to avoid over-engineering simple services.