_____________________________________________________________________ Bid must include your fixed budget in first line, If that is empty, I will pass that proposal. Don't require higher budget once interview is started. I am not gonna hire like this developer. ___________________________________________________________________ We are looking for an experienced VPN app developer to build a secure, cross-platform VPN client supporting WireGuard, Shadowsocks (TCP/UDP), Shadowsocks over WebSocket/HTTPX, and multi-hop Shadowsocks (up to 3 hops) similar to Outline. The app will: -Accept access keys and connect to the VPN -If connection fails, it should fallback from WireGuard to Shadowsocks -Support multi-hop configurations (example JSON will be provided) -Support Shadowsocks over WebSocket and HTTPX -Periodically fetch domain lists via API to avoid blocking (API returns fallback domains) -Report successful and failed connections back to the API Platforms to Support: -Flutter, Kotlin, Switft and etc Key Requirements: -Implement support for: -WireGuard -Shadowsocks(TCP/UDP) -Shadowsocks over WebSocket and HTTPX -Multi-hop Shadowsocks (up to 3 hops) -Integrate backend APIs for: -VPN config fetching -Domain fallback handling -Connection reporting -Support Outline-style access key format(ssconf://) -Hande first-lanch and periodic updates for domain rotation Windows and Android version was already completed last month. In Windows version there are a few stuff that must be upgraded by you. Thank you so much for your bid.