
• Android SDK: Services, Fragments, Concurrency, GCM, Location and Sensor APIs, Custom UI, Camera API, SQLite, ContentProvider, Preferences, Maps API, Animation, Drive SDK, TextToSpeach, Media, Webview (+JS), Google Play Services, Firebase Services, Transitions API, Retrofit, RxJava / RxAndroid, Stream API, LiveData, Room, ViewModel, MVVM, Kotlin • Java EE: Jersey, Glassfish • .NET: C# Windows Forms • SQL: MySQL, SQLite, PostgreSQL • CVS: Git, Mercurial, Tfs • Operation Systems: Linux, Windows...