Developer shares Kotlin, Retrofit, and Coroutines stack for open-source Android app

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A developer has published a practical guide detailing the architecture and code patterns used to build a production-ready Android app for MyZubster, an open-source skill exchange platform. The app is built with Kotlin and follows the MVVM plus Repository pattern, using Retrofit with OkHttp for networking and Coroutines with StateFlow for asynchronous operations. JWT-based authentication is handled via a custom AuthInterceptor that automatically attaches tokens to outgoing API requests, while credentials are stored locally using SharedPreferences. Additional features include paginated booking history powered by a ViewModel, QR code generation for Monero payment addresses using the ZXing library, and a session countdown timer for user session management. The guide highlights key architectural takeaways such as separating data sources from UI logic, automating token injection, and using reactive streams for efficient UI updates.

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