[Node.js][Express][MongoDB][Socket.io][WebRTC]
01 Context & Problem
Learners lack affordable, real-time interactive platforms to exchange skills directly with peers without intermediaries.
02 Architecture & Design
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Created a real-time platform facilitating direct P2P connections via WebRTC video calls and low-latency Socket.io messaging.
03 Key Technical Decisions
- Decision: WebRTC chosen for near-zero latency video calls avoiding expensive media server costs.
- Decision: MongoDB (NoSQL) for flexible user profile schemas and skill tags.
- Decision: Socket.io rooms used for isolating chat sessions and whiteboard events.
04 Challenges & Resolutions
! Warning: NAT Traversal: Configured STUN/TURN servers to allow connections across different networks.
! Warning: State Synchronization: Managed collaborative whiteboard state using event broadcasting to ensure all peers see the same drawing.