Flutter Social App Build & Deploy

I want a full-featured social media application built in Flutter and taken all the way to live status on both the App Store and Google Play. A single code-base is essential, so please stay within the Flutter/Dart ecosystem and follow Apple and Google submission guidelines from day one... (Budget: £250 - £750 GBP, Jobs: Android, App Store Optimization, Dart, Flutter, iOS Development, iPhone, Mobile App Development, PHP)