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CASE STUDY2024Full-stack Developer
Realtime Chat
Real-time messaging application with Socket.IO, MongoDB persistence, and AES encryption.
ReactNode.jsExpressSocket.IOMongoDBAES EncryptionTailwind CSS
// CONTEXT & OBJECTIVE
An online messaging application supporting real-time 1-on-1 communication between users with a responsive, streamlined UI.
The project emphasizes maintaining reliable WebSocket connections and securing stored message data in the database.
// ENGINEERING CHALLENGES
Key Engineering Hurdles & Solutions
CHALLENGE 01
Client-Server WebSocket Event Synchronization
Managed user socket mapping (userSocketMap), routing messages directly to the recipient's active socketId with online/offline presence broadcasting.
CHALLENGE 02
Message Payload Encryption
Applied AES ciphering to message text before persisting to MongoDB, protecting data at rest.
// RESULTS & TAKEAWAYS
Measurable Outcomes & Learnings
>Smooth, responsive instant message delivery powered by Socket.IO.
>Protected conversation data at rest with database-level payload encryption.