Hiring
[HIRING] React Native Android Dev – Fix VoIP Calling (FCM + WebRTC)
FreelanceHairy-Efficiency24903 upvotes
Hey, I’m building an edtech app, where mentors call students via in-app VoIP.
We already have a working system using:
• React Native (bare)
• LiveKit (WebRTC)
• FCM (data notifications)
• Socket.IO
But on Android, it’s unreliable:
• Incoming calls sometimes don’t show
• Answer button doesn’t open call screen
• FCM delay (5–10 sec)
• Issues on OEM devices (OPPO, Vivo, Realme, etc.)
Looking for someone who has:
• Strong React Native + Android native experience
• Worked on VoIP / calling systems
• Experience handling FCM + background/killed state
• Familiar with Android battery optimization issues
Goal: Make it work as reliably as WhatsApp calling
⏱ Timeline: 2–3 days
💰 Budget: Flexible for the right person
If you’ve built something similar, comment or DM with:
• Past work (VoIP / real-time apps)
• Brief approach you’d take
I’ll share full technical details after shortlisting.