Building Scalable Jetpack Compose Android Applications with a Multi-Module Architecture
Article Summary
Chamod Lakmal from PickMe breaks down how multi-module architecture transformed their Android development. If your Compose app is becoming a monolithic nightmare, this is your roadmap out.
PickMe Engineering tackles the challenge of building scalable Jetpack Compose apps that serve millions of users. This deep dive covers everything from module boundaries and Clean Architecture to dynamic features and build optimization strategies that actually work in production.
Key Takeaways
- Gradle recompiles only modified modules, dramatically cutting build times
- Dynamic feature modules reduce APK size through on-demand downloads
- Clean Architecture layers (domain/data/presentation) enable framework-independent testing
- Centralized navigation with sealed classes keeps features decoupled
- Hilt dependency injection works seamlessly across all modules
Multi-module architecture with Jetpack Compose delivers faster builds, smaller APKs, and independent feature development at scale.
About This Article
As PickMe's Android app grew to millions of customers and thousands of service partners, the monolithic architecture became a bottleneck. The team struggled to keep the codebase organized and couldn't add new features without risking the entire application.
Chamod Lakmal's team split the app into multiple modules organized by Clean Architecture layers: domain, data, and presentation. They used Dagger Hilt to manage dependencies across modules and built a dedicated navigation module with sealed classes to keep features independent.
The multi-module setup made incremental Kotlin compilation and parallel Gradle execution possible. This cut compilation time significantly by only recompiling changed files. Dynamic feature modules let the team deliver features on-demand, which reduced APK size for millions of users.