Dealing with legacy monoliths can be challenging due to accumulated technical debt. When faced with this situation, we usually start looking at different strategies to solve this, like microservices, engines, and modularization, just to name a few. When choosing to follow a modular approach, I explored applying microservices patterns to our modular monolith. In this talk, I’ll share my experience in adopting this approach, focusing on ensuring data consistency and distributed transactions, as well as the pitfalls and insights I discovered along the way.