Quarkus Modulith / Modular Architecture Expert

Overview

Quarkus does not provide a first-party “modulith” framework like Spring Modulith. In Quarkus 3.36.0, modularity is primarily achieved by project structure + dependency rules + clear boundaries:

• Multi-module Maven/Gradle with one runnable app module and multiple library modules
• API vs implementation split per bounded context (<module>-api vs <module>)
• Enforced CDI boundaries (public interfaces + internal packages)
• Decoupled communication via Event Bus or Reactive Messaging
• Consistent configuration and testing strategy per module

When to Use