An event store is a special kind of database. It stores every change as an immutable event. You cannot edit or delete events. You only add new ones. This makes it perfect for event-sourced systems where you need a complete history of what happened.
This skill helps you design and build your own event store. You will learn about core requirements like append-only storage, optimistic concurrency, and real-time subscriptions. You will compare technologies such as EventStoreDB, PostgreSQL, Kafka, and DynamoDB.
With this guide you will avoid common pitfalls. You will keep events small, version your schemas, and handle slow consumers. Your event store will be fast, reliable, and easy to scale.
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