I need senior MERN stack developer.

Need help completing the rest of this project. Building a simple video chat app. About 50% complete. Need dev to help with the final parts. This app is based off this code base: https://fireship.io/lessons/webrtc-firebase-video-chat/

The task is to modify this base code / connect one API and make a few more tweaks. Please apply if you have experience with WebRTC / React / NextJS / Firebase (No-SQL). This entire project should take less than 3 days to complete.

Thanks