VPN Business client and admin web UI, android app

I'm looking for an experienced Android developer who can create a VPN app for me. This will be a key component in launching my VPN business.

Key Features:
- User Authentication: The app should have a secure login process using a username and password.
- Server Selection: Users should be able to select from a range of servers.
- Kill Switch: This feature is crucial for ensuring user security and privacy.

Ideal Skills and Experience:
- Proven experience in Android app development.
- Prior experience with developing VPN apps would be highly beneficial.
- Strong understanding of user authentication processes and server management.
- Ability to implement a reliable kill switch feature.