A real-time clinical vitals dashboard built in React and TypeScript, displaying live patient metrics including heart rate, SpO₂, temperature, respiratory rate, and blood pressure. Hand-rolled SVG sparklines replace heavy charting libraries, keeping the bundle lean and rendering smooth under continuous updates. Severity-based alerting with ARIA accessibility, memoized rendering, and derived state keep the UI responsive at high tick rates. Built to demonstrate what production-grade clinical frontend engineering actually looks like.