Event Driven Architecture and Coupling: You’re Not as Decoupled as You Think

The article discusses how many teams mistakenly believe they have achieved decoupling by using event-driven architecture with message brokers, but often end up with CRUD events that merely replicate data across services. It explains the difference between state-change events (like ShipmentStatusChanged) and meaningful domain events (like ShipmentDelivered), highlighting how the former can expose internal data models as public APIs and create hidden coupling. The author provides practical advice on designing events that reflect actual business occurrences, improving system resilience and maintainability. This is relevant for software architects and developers working with microservices, event-driven systems, and distributed architectures.