Title Offline Local Video Calling App (WebRTC) – Proof of Concept / MVP ⸻ 1️⃣ Context We are building a portable communications system that operates without internet or cellular backhaul. Phones connect to a local Wi-Fi mesh and must be able to discover each other and place 1:1 video calls entirely offline. ⸻ 2️⃣ Core Requirement (THIS IS THE HEART) We need an offline-capable mobile app that: • runs on Android (iOS optional, not required for v1) • performs 1:1 voice + video calls • works with zero internet • uses WebRTC P2P for media (no cloud servers, no media relays) ⸻ 3️⃣ Local Signaling (be very explicit) The app must: • auto-discover a local signaling service on the LAN (mDNS / gateway fallback) • register a user identity (name + device ID) • show a list of online users • initiate and receive calls by user name (not IP) The signaling service will run locally (on a router or small Linux device) and only coordinates call setup (SDP/ICE exchange). What the Signaling Server Must Do The local server must: • accept client registrations • maintain presence (“who’s online”) • forward call invitations • exchange WebRTC metadata • survive IP changes / reconnections It does not process audio or video. Out of scope for v1: • group calls • recording • cloud sync • login with Google/Apple • push notifications via internet • SFU / media relay • AI / analytics • dashboards Deliverables (concrete) Deliverables expected: 1. Android & IOS APP app (APK + source) 2. Local signaling server (Docker or Linux service) 3. Basic documentation: • how discovery works • how to deploy server • how to test offline 4. Demo scenario: • two phones connect to same Wi-Fi • discover each other • place a video call offline The project is successful if: • two phones can place a clear video call Android to IOS and vice versa • with no internet connectivity • using only a local Wi-Fi network Preferred Tech Stack (guidance, not mandate) Preferred (but flexible): • WebRTC native stack • Kotlin (Android) • Node.js or Go for signaling • WebSocket-based signaling • mDNS / Bonjour discovery • with automatic discovery and user selection Please let me know if this is something you can do and what the total cost would look like.