Nexus Financial Dashboard: Scaling WebSockets for Real-Time Trading
The Challenge
Nexus Capital required a complete overhaul of their internal trading dashboard. Their existing infrastructure relied on long-polling to fetch stock prices, resulting in a 2-second delay that was unacceptable for institutional day traders. Furthermore, the frontend interface was built on legacy jQuery, causing massive memory leaks when rendering thousands of DOM elements during peak trading hours.
The Solution
E. Technology architected a completely new decoupled system. The backend was rewritten in Go to handle thousands of concurrent WebSocket connections efficiently. The data stream was routed through Redis pub/sub to ensure sub-millisecond data distribution across instances.
On the frontend, we implemented React with a virtualized list architecture. This ensured that only the ticker rows currently visible on the user's screen were actually rendered, dropping memory consumption by over 80%.
The Results
Within two weeks of deployment, Nexus reported a complete elimination of UI blocking during high-volatility market opening hours. The new architecture directly contributed to faster trade executions.
12ms
Average Data Latency80%
Memory Reduction50k+
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