Android and iOS social app development

We are looking for expert iOS and Android developers to develop a mobile based social app (if you have a team it would be better) - Expert Level in iOS development and have experience developing in iOS 5, 6, and 7. - Expert Level in Android development in Jelly Bean and Ice Cream Sandwich. - Expert Level in MySQL database design and can develop highly scalable databases (preferrable you have commercial experience in sharding and clustering.) - Amazon AWS server experience (using default AWS setup or Red Hat Enterprise setup) - Node.js experience to create fast chat/feed applications. - Preferrably you worked with Python and Django previous because the web interface will be in that framework. - Excellent app design experience using photoshop. - Excellent in documentations Features required on the app (you need to have built similar features before, we don’t want someone who is just learning, we need an expert on these areas): 1. Find user feature – When user first sign up the app will provide a streamline feature which will be able to scan user’s phone contact list, using email or phone number to match existing member. Then automatically send them request to connect. For the remaining non-matching contact we will send an email to request them to join. (this is quite a standard feature in many new member based apps such as the Twitter app) 2. using Facebook, Linkedin or Twitter acounts to join. 3. Simple chat facilities, (sending messages between users). 4. Able to redirect users to third party connection methods ( for example when a user click call button it will immediately open the phone app to call, or click SMS it will open the SMS app, or email button and opens the email app) 5. A news feed page which will have the latest user created feeds load up. 6. Member login and member profile features. 7. Push notifications 8. In app purchase 9. Membership facilities.