architecture-patterns

Clean Architecture separates core business logic from frameworks and infrastructure by organizing your backend into distinct layers. This approach ensures your domain rules remain testable and independent of external tools or database implementations.

Applying Domain-Driven Design is the best way to refactor a monolithic backend by defining clear bounded contexts and establishing a ubiquitous language. This pattern isolates domain logic into manageable aggregates and aligns team boundaries.

Hexagonal Architecture uses ports and adapters to enable interchangeable backend implementations by defining standard interfaces for all external interactions. Adapters implement these ports, allowing you to swap databases or APIs without altering the core domain logic.

You can incrementally apply architecture patterns to an existing backend by auditing the current structure, defining domain boundaries, and mapping interactions through ports and adapters. This stepping-stone approach allows gradual refactoring without a full rewrite.

Use Hexagonal Architecture instead of standard layered architecture when you need strict framework-agnostic core code and easily swappable infrastructure components. It isolates the domain logic completely, whereas traditional layering often allows infrastructure dependencies to leak into the core.