Social Networking Android App Development

I'm looking for an experienced developer to build the frontend and backend of a social networking Android app.

Key Features:
- User Profiles: The app should allow users to create and customize their profiles.
- Messaging System: A robust messaging system is essential for user interaction.
- VOIP Calling: The app should support VOIP calling, specifically audio calls only.

The ideal freelancer or team should have:
- Proven experience in Android app development, particularly in creating social networking apps.
- Strong skills in both frontend and backend development.
- Experience implementing a messaging system and VOIP calling in previous projects.

Please include examples of similar projects you've worked on in your proposal.