Social Media App Architecture Design

I’m mapping out a new social platform that will debut on both iOS and Android. Core features include user profiles and timelines, real-time messaging and chat, rich media sharing for photos and videos, in-app games, plus peer-to-peer sharing... (Budget: ₹100 - ₹400 INR, Jobs: Android, API Development, Cloud Computing, iOS, iPhone, Java, Mobile App Development, Software Architecture)