Complete VoIP Video Calling Platform

I’m building a full-scale VoIP platform centred on real-time video calling. The service must run smoothly on both desktop browsers and mobile apps, so expect work that spans WebRTC signalling, SIP integration,... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Flutter, JavaScript, Mobile App Development, React Native, SIP, VoIP, WebRTC)