Deploy Ready App Across Platforms

My cross-platform app is fully coded and ready to go; what I need now is a smooth, end-to-end deployment. I already hold active developer accounts for both the Apple App Store and Google Play, so certificates and access are in place... (Budget: $30 - $250 USD, Jobs: Android, Android App Development, App Store Optimization, iOS Development, iPhone, Mobile App Development, SEO, Web Development)