There are many openvpn apps in github for example, easyvpn or ics-openvpn
You would have to build demo app that can connect openvpn through ssh or tls tunnel.
we can provide server to be installed openvpn+tunneling proxy
you can make demo app and you should provide full source with document.
App should allow vpn for itself, otherwise you don't exlcude vpn for demo app's package name.
code should be written in AndroidStudio 3+ using java.
Its very urgent project.
Only those people can bid who have done already this kind of project or very experienced developers.
6 фрилансеров(-а) в среднем готовы выполнить эту работу за $404
Hello! My name is Igor, I can help you I am a developer of applications for android Feel free to contact me at any time to discuss the details of the project