arch-ddd

Define bounded contexts by identifying explicit domain boundaries and ownership to fix leaky backend architecture. This approach maps ubiquitous language directly to code structure, ensuring consistent model evolution and clean separation between domain, application, and infrastructure layers.

The best way to structure aggregates and domain events is by applying a DDD-aligned backend structure across microservices. This governs bounded contexts, specifies aggregate roots and entities, and enforces invariant rules to maintain consistency across distributed systems.

Implement an anti-corruption layer by enforcing clean separation between domain, application, and infrastructure. This DDD-aligned structure isolates your core domain models and ubiquitous language from external systems, preventing inconsistent models and reducing long-term maintenance costs.

Domain-driven design works for both monoliths and microservices by governing bounded contexts and domain events across either architecture. It enforces ubiquitous language and explicit context boundaries, preventing leaky boundaries and making system evolution less costly regardless of scale.

You should not use a full DDD backend structure when your project lacks complex domain rules or invariant logic. If your backend does not require explicit context boundaries, ubiquitous language mapping, or clean separation between layers, the overhead of aggregates and domain events may be unnecessary.

Start drafting a backend module by identifying a minimal bounded context, extracting aggregates and domain events, and implementing a simple repository. This establishes explicit context boundaries and domain ownership, laying the groundwork for consistent system evolution.