Android Group Chat Video App

I'm looking for a seasoned developer to help me enhance an existing Android video chat app.

Key Features:
- The app should support group chat functionality. and personal option

User Authentication:
- The app needs to incorporate user authentication via social media accounts and mobile number

Ideal Skills:
- Proficiency in Android/ios app development
- Experience with backend integration
- Previous work with video chat applications
- Knowledge of implementing social media authentication

Please provide examples of similar projects you've completed.