📡 Build a WebRTC Video Call App with MERN, Socket.io & STUN/TURN

Ever wondered how Zoom or Google Meet works under the hood?

I built a full‑stack video calling app using MERN + WebRTC + Socket.io – and you can too.

Here's the high-level architecture:

• Frontend: React (Vite) + WebRTC APIs
• Backend: Node.js + Express + Socket.io (signaling)
• Database: MongoDB (call logs, auth)
• NAT Traversal: STUN/TURN servers

🔁 How It Works

1. Users join a room via Socket.io
2. WebRTC exchanges SDP offers/answers
3. ICE candidates find the best connection path
4. Media streams flow peer-to-peer (or via TURN if direct fails)

💡 Why This Matters

• Learn real‑time P2P media without third‑party APIs
• Understand signaling, ICE, and NAT traversal
• Build a foundation for Zoom‑like apps, telehealth, or collaboration tools

🛠️ Tech Stack Highlights

• RTCPeerConnection & getUserMedia
• Custom useWebRTC React hook
• Socket.io room‑based signaling
• Optional TURN relay for production

🚀 Get the Full Code & Step‑by‑Step Guide

The complete tutorial includes:

• Backend server with Socket.io logic
• Frontend React component + custom hook
• Environment setup & debugging tips
• TURN server configuration for real‑world use
• Scaling insights (mesh vs SFU)

👉 Read the full article here:

🔗 Build a WebRTC Video Call App with MERN, Socket.io & STUN/TURN Servers (2026)

If you find this helpful, drop a 🧠 or a ❤️ – and happy coding!