Excellent experience with Java and Kotlin, OOP, Android SDK's MVVM/MVP architecture Google's Architecture Components & Google’s ML Kit Web services (REST) and Backend cloud services (AWS, Firebase) Android Libraries: Networking (Retrofit2), Dependency Injection(Dagger2, Koin), Image loading and caching (Glide, Picasso), Asynchronous Reactive Programming (RxJava2, Kotlin coroutines, RxKotlin, RxAndroid) Databases (Room, Realm, ObjectBox)