Fintech Chat App.
Better conversations. By design.
01The challenge
Build a real-time messaging platform for financial advisors and clients with end-to-end encryption, file sharing, and compliance archiving.
02The approach
React frontend with WebSocket-based real-time messaging, Node.js backend, message queue for reliability, and encrypted storage layer.
03What improved
- Sub-100ms message delivery with optimistic UI updates
- Message pagination reducing memory usage by 70%
- Connection pooling handling 500+ concurrent users
04What I took forward
- WebSocket reconnection logic is harder than the initial connection
- Optimistic UI is essential for chat — users expect instant feedback
- Compliance requirements shape architecture more than features do