Flutter VPN App (WireGuard, multi-node, backend integration) – Budget max €600

We are looking for a developer with proven experience in VPNs (WireGuard/OpenVPN) and Flutter. This is not just a UI job — the Flutter base app is already done. The goal is to build a functional VPN service with backend + multi-node support… (Budget: €100 – €600 EUR, Jobs: Android, iPhone, Linux, Mobile App Development, Node.js)