Need Nord VPN client/apps

We are whitelabeling Nord's VPN service. I need someone to build an app for Windows that has the same functionality as Nord's. This includes 1 step automatic install, on off switch, kill switch, choose country from list. Eventually will want apps for other devices. You don't have to be able to do these other apps but if you can it will be an added plus. Would like someone who has built VPN clients before and perhaps can point me to examples.