I need a fully hosted messaging layer added to my existing user app so that everyone can exchange text, voice, and video messages without leaving the platform. Messages must travel in real time—latency under a second is the target—so please plan on WebSocket or a comparable push technology, and WebRTC for voice/video streams. All traffic will sit on my current hosting stack; you’ll receive SSH access and an environment file with the relevant keys. Users already sign in with a simple email-and-password flow, and that method should remain the single source of authentication for the messaging feature. Once signed in, each user should see their conversations, create new threads, attach short voice clips, launch live video, and receive instant notifications when something new arrives. Security basics—TLS, rate limiting, sanitized uploads—are non-negotiable. Deliverables • Backend service (API + real-time socket server) deployed on my host • Front-end components integrated into the existing app UI • Database migrations for conversations, messages, and media storage • Clear setup & deployment notes plus a short test script that proves text, voice, and video messages move in real time between two test accounts Code can be in Node.js, Python, or Go—whichever lets you meet the latency goal most reliably. And andriod apk also for realtime notification