I need to build a professional-grade stock trading platform aimed squarely at experienced traders. The core of the project is a real-time market data feed with millisecond latency, combined with interactive, multi-time-frame charts that support advanced technical indicators and drawing tools. Order entry must feel instantaneous, and the system has to handle both manual orders and rules-based automated strategies triggered by user-defined conditions. A few implementation notes so the scope is crystal clear: • Data: Stream live Level I/II quotes via WebSocket or FIX, and cache them efficiently so historical look-ups are smooth. • Charts: Think TradingView-style performance—zoom, pan, overlay multiple symbols—built with a modern library such as D3, Highcharts, or a comparable WebGL solution. • Automation: Users should be able to script strategies (Python or JavaScript sandbox is fine) and let them run on a low-latency engine that can fire orders directly to a broker API like Interactive Brokers or Alpaca. • UX: A clean, responsive web UI; dark-mode ready; keyboard shortcuts for rapid order entry. • Security & Compliance: Encrypted traffic (TLS 1.3), secure credential storage, role-based access, and an audit trail for every executed order. Deliverables I expect: 1. Architectural plan and tech stack recommendation. 2. Incremental builds of the front-end, back-end, and data pipeline, each deployable to a cloud environment (AWS or similar). 3. Automated test suite proving reliable order routing, data integrity, and failover. 4. Final production build with deployment scripts and concise developer documentation. If you’ve shipped trading or low-latency finance projects before, showcase them; it will weigh heavily in my selection. I’m ready to get started as soon as we confirm the stack and milestones.