The payment was successful. The ledger had been updated. The transaction had completed. Everything looked correct from the backend. And yet the customer opened the app and saw the old balance. They refreshed. Still the old balance. They checked again.…
We originally introduced Kafka for a simple reason. We needed asynchronous communication. A service would publish an event. Another service would consume it. The producer didn’t need to wait. The consumer could process the event independently. It looked straightforward. Kafka…
One of the first principles we adopted after decomposing the system was simple: Every service should own its own data. It sounded right. The architecture became cleaner. Teams could deploy independently. Services no longer needed direct access to another service’s…
