← Back to lessons|architecture
Passkeys not supported in this browser
Event Sourcing over CRUD for Audit Trails
Adopted Event Sourcing over CRUD to meet compliance audit trail requirements, using Kafka for immutable event logs and Postgres materialized views for reads.
lesson_learnedevent-sourcingaudit-trailcompliance
Created 7/29/2026, 8:16:35 AM
Content
The team decided to move from standard CRUD in PostgreSQL to Event Sourcing for financial transaction audit trails using Kafka for immutable event logs and Postgres materialized views for reads. Implementation: src/services/transactionService.ts and src/events/eventStore.ts. Reference: Martin Fowler Event Sourcing Pattern.