Wix has a huge scale of event driven traffic. More than 70 billion Kafka business events per day. Over the past few years Wix has made a gradual transition to an event-driven architecture for its 2000 microservices. We have learned a lot about how to make sure our production is still maintainable, performant and resilient. In this talk you will hear about: 1. The importance of atomic operations for databases and events 2. Avoiding full-blown event sourcing, instead taking CRUD to the next level 3. Having essential events debugging and quick-fix tools in production. And more.