Microservice double-charges 847 customers, team panics—until postgres reveals it's a stealth event store, no kafka circus needed

A comprehensive guide to building a production-ready event store in PostgreSQL has been released, addressing the challenges of data corruption and auditability in microservices. The guide emphasizes the importance of event sourcing, which stores every state change as an immutable event, allowing for accurate auditing and debugging. By utilizing PostgreSQL's features such as JSONB, table partitioning, and LISTEN/NOTIFY, developers can create a scalable and reliable event store without requiring specialized infrastructure. The guide provides a step-by-step approach to designing a schema, handling concurrency conflicts, and implementing projections, as well as strategies for snapshotting, performance optimization, and operational maintenance. With this approach, developers can ensure data integrity, simplify debugging, and improve overall system reliability. By following the guide, organizations can avoid the complexity and costs associated with introducing dedicated event store solutions, such as EventStoreDB or Kafka, and instead leverage their existing PostgreSQL expertise.