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📈 Real-Time Trading Dashboard

Business Impact

Architecture Diagrams

1. High-Level System Design

Key Decisions

  • Dual WebSocket fallback (primary + backup connection)
  • Edge caching for static bundles with SRI
  • Web Workers for off-thread data normalization

2. Data Flow Optimization

Innovations

Technical Leadership

1. Performance Breakthroughs

MetricBeforeAfter
Data → Paint320ms92ms
WS Bandwidth12MB/hr4.2MB/hr
Crash Rate2.1%0.03%

How:

  • WebAssembly for price normalization
  • Canvas pooling to avoid GC spikes
  • Volatility-based throttling (render less during calm markets)

2. Cross-Team Leadership

  • Backend: Co-designed binary WS protocol (replaced JSON)
  • QA: Implemented visual regression testing with 0.1px tolerance
  • Security: Enforced SRI + CSP for all edge assets

3. Crisis Management

Black Monday Scenario:

  • Detected 10x message volume spike
  • Activated degraded mode (1s candles → 5s candles)
  • Maintained core functionality during 300% traffic surge

Artifacts

Architecture Decision Record

# ADR 015: Canvas vs SVG

        **Chose Canvas because:**
        - 8x faster for 500+ moving elements
        - Better memory control for 12h sessions

        **Tradeoff:**
        - Lost built-in a11y (added ARIA overlays)
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