event-sourcing-architect

Event sourcing captures every state change as an immutable fact to ensure complete audit trails and temporal queries. You need it over CRUD when your domain requires eventual consistency, reliable history replay, and recovery from partial failures without losing traceability.

Designing CQRS projections involves building optimized read models and handling command validation separately from the event store. You can regenerate projections before production deployments to ensure read model consistency and query performance.

Saga orchestration coordinates compensating transactions and durable execution across multi-aggregate workflows using correlation IDs. It ensures reliable cross-service business processes by managing durable process managers for consistent state histories and partial failure recovery.

Event sourcing is ideal for audit-heavy systems and time-travel debugging because it stores immutable events. You can replay events safely to inspect historical states and reason about system behavior at any point in time.

Event versioning and snapshotting manage long-lived entities by defining immutable events and storage patterns within your event store. This approach supports aggregate boundaries and ensures reliable temporal queries without reloading entire event streams.

Replacing CRUD with event-driven architecture introduces eventual consistency and requires immutable event modeling, versioning, and durable process managers. It is not suited for domains lacking complex workflows or where immediate consistency outweighs audit trail and temporal query benefits.