Real-time market dashboard with sub-50ms UI updates

Challenge

A market-data dashboard on a legacy React stack dropped frames and built up memory pressure during high-volatility periods. The team needed a frontend that could keep up with multiple data streams without losing responsiveness.

Solution

We rebuilt the frontend on Next.js App Router with React Server Components for static chrome and a canvas-based order book for the hot path. WebSocket streams feed normalized deltas into a typed client store, with backpressure handling for spike periods.

Architecture

Event-driven architecture with Redis Streams as the message bus. Next.js renders Server Components for static chrome; client components handle WebSocket data streams and render to canvas for the order book. Typed contracts between server and client.

Stack

Key Metrics

Outcomes

• Eliminated frame drops during high-volatility windows
• Removed unbounded memory growth from the trading view
• Reduced time-to-interactive for analyst workflows
• Clear separation between server-rendered chrome and real-time client surface