ddd

Domain-Driven Design decouples business logic by enforcing strict dependency inversion rules and separating domain, application, infrastructure, and presentation layers. This architecture ensures dependencies flow inward only, keeping business rules pure and testable.

Refactor a monolithic service by migrating existing business logic into pure domain entities, value objects, and domain policies. This process establishes clear architectural boundaries, preventing tightly coupled layers and God objects.

Structure complex domain entities and value objects by implementing Domain-Driven Design patterns that keep business logic actor-agnostic. This approach ensures the domain layer remains pure, maintainable, and independent of application concerns.

You need Domain-Driven Design architecture when your complex software project suffers from tightly coupled layers and God objects. It provides a structured framework to enforce layer-specific responsibilities and ensure long-term maintainability.

Yes, Domain-Driven Design patterns improve software testability by isolating business rules in pure domain entities and policies. Decoupling these from infrastructure concerns allows you to test core logic without external dependencies.

Applying DDD to existing monolithic codebases requires strict adherence to dependency inversion rules and migrating logic into new domain layers. The main limitation is the significant refactoring effort needed to untangle tightly coupled layers.