I studied computer science at university and have 3 years post graduate experience developing iPhone/Android and PHP/Java web apps.
 I love developing software and enjoy the way working as a freelancer brings me into contact with clients from around the world.
 I have developed a number iOS and Android native applications from initial conception right through to submission to the AppStore or Google Play.
 I have also debugged and fixed projects that have been started, but no completed, by other developers.
 I use git and GitHub for revision control and generally check in code every day so clients can keep a close eye on the progress of their projects.
I have good practical English and communicate with clients over email, IM and Skype as well as bug trackers like RT.
I believe understanding the specification correctly and maintaining regular communication are two of the keys to effective software development.
 I can almost certainly satisfy your requirements 100% and recommend you check out my reviews for some independent assessment.
I have been working for over  3 years  in upwork as freelance.
My skill:
       1. iPhone Android application design
       2. Parse SDK
       3. Video Audio stream
       4. Facebook , Twitter , Instagram social API
       5. google API , google MAP
       6. QRcode , Bar Code scanning
       7. Opentok , WebRTC
       8. excellent english communication