Cross-Platform P2P Marketplace App

I'm seeking an experienced mobile app developer to create a peer-to-peer marketplace application that runs on both iOS and Android. The app should facilitate the trading of physical goods, messaging, map integration, support system, and more... (Budget: $1500 - $3000 USD, Jobs: Agile Development, Android, Android App Development, Backend Development, Data Protection, iOS Development, iPhone, Mobile App Development, Payment Gateway Integration, PHP)