I read your requirement carefully i can assure you that we can deliver it very efficiently. I have worked in following:
Java, Android, Android Studio, Firebase, In-App purchase, Xmpp,xamarin, Graphic design, development, Mobile development, native and hybrid apps development including Android , iPhone and IONIC , React Native , Phonegap apps development and backend API with admin panel development.
I am seeking for opportunity to work with you hope my profile suits your requirement very well.