I have successful and profound experience in Android-development. I have experience in design of complex applications.
Last 5 years I make Android applications using last features of Android SDK.
Sometimes I use Android NDK and C++ to write fast and low-level code.
I like fast and animated Android applications, and I spend a lot of time to learn new technology and features. I like good UI design, difficult and interesting tasks. For example I have got 3d place at Telegram Challenge 2015, it was really interesting experience, and one of most difficult tasks.
Last years .net development is part of my work: I support some applications (Windows Forms client, Windows service, Web servers) and I have developed .net mvc application for new great startup.
Additionally, I have experience with Xamarin — about half a year I developed the Xamarin.Forms application.
I can work with good team but I can write difficult applications alone (see my experience).
May be I don't have good knowledge of mathematics and computer science, but I can investigate algorithms, data structures and so on, and I can create application's architecture and implement it.