Hello, Sir.
I've just read your job posting line by line. I am very interested in your app.
If you want to know my skill, please see https://www.elance.com/s/rian_rian/10183#backurl=aHR0cHM6Ly93d3cuZWxhbmNlLmNvbS9yL2NvbnRyYWN0b3JzL3EtcmlhbnJpYW4=.
I have full experiences for Android/iPhone/HTML5 Game and app.
Especially, i have completed many social networking/messenger app(Facebook, Twitter).
I have experienced almost all parts of iOS tech & skills for over 5 years, and I am in the top in the Objective-C and iOS programming tests, with rich experience in REST API, SOAP API, JSON/XML, PHP & MySQL Web Service API, Facebook API, Twitter API, Foursquare API, MapKit, Payment Gateway APIs, External devices, eCommerce platforms.
I can start your project immediately and work full time for you (40+ hours/week). And I can complete your app successfully in high quality and in time that you want.
Best Regards