Katas for practice Kotlin( Coroutines, dataclasses, delegate properties...) Clean Architecture and best practices in Android(DI, Dagger, MVP, Espresso) implemented by Jorge Sánchez (Xurxodev)
Multiple samples showing the best practices in performance on Android.
Samples and best practices for TornadoFX
Android Architecture with Kotlin – Best Practices
Kotlin Development Practices (Android)
Android application following best practices: Kotlin, coroutines, Clean Architecture, feature modules, tests, MVVM, static analysis...
How to use Kotlin with popular Android libraries
Multiple samples showing the best practices in camera APIs on Android.