I have more than 2 years of experience commercial in android, main stack always was:
Kotlin, Android, REST API (Retrofit), Pagging, Flow/LiveData, Kotlin Coroutines, ProGuard, Dagger2, Room, Constaints/Linear/Scroll/Frame/Grid layouts, Binding, NavGraph, SoloActivity, MVVM/MVC, JUnit, Solo Activity, Fragments, RecyclerView.