More than 5 years in development. Professional knowledge of a programming languages: Java, Swift. Good level of knowledge: Kotlin, C++, C#, SQL, desing patterns. Architecture: MVP, VIPER, Clean Arcitecture, MVVM. Extensive experience in Android Studio, Xcode, Jira, VCS (git, svn, mercurial), RxJava, RxSwift, Room, Realm, Dagger, Retrofit, Firebase. Experience in AppCode, Data Binding, ViewModel, OpenCV library, WPF, WinForms, Qt, JavaScript, HTML, VK SDK, Facebook SDK and other.