replit project (pushnotification, gps location fix) and deployment

I already have a working prototype on Replit.ai, but its push notifications only appear while the app is open. I need those alerts to behave like the Uber Driver app—arriving instantly on both iOS and... (Budget: €30 - €250 EUR, Jobs: Android, API Development, Backend Development, GPS, iOS Development, iPhone, Mobile App Development, Push Notification, Replit, VPS)