Hi, thank you for your job posting.
I read your job detail carefully and I think i'm a best contractor for you.
Because I had developed many backend ios/android app before and mastered all branches of iOS development such as social integrate, XML/JSON paser RESTful/SOAP Api and so on.
I'm also mastered Ruby on Rails.
I'm a serious bidder. So don't worry about my skills and my ability.
I will finish project as possible as you want.
Best regard
Alexander Popov