Random Voice Call App Development

I'm seeking an experienced mobile app developer to create an Android application for random voice calls. Users should be automatically connected to any available user.

Key Requirements:
- Android platform support
- Automatic user connection

Ideal Skills and Experience:
- Proficiency in Android app development
- Experience with real-time call connection technology
- User-friendly UI/UX design
- Familiarity with backend integration for user management

Please share your relevant experience and approach.