Secure Crypto Exchange Development

I need a production-ready crypto exchange site that lets users trade on a live spot market with Bitcoin, Ethereum, Ripple and USDT from day one, with the option to add more pairs later. Real-time order books, depth charts, trade history and WebSocket price feeds should feel as fast as the major exchanges. Security is the main priority. The build must ship with strong account protection (2FA, email/SMS verification), cold-wallet segregation for the majority of funds, hot-wallet limits, and an architecture that can absorb DDoS spikes without downtime. Please plan for regular penetration testing and clear audit logs. A clean React (or Vue) front-end talking to a Node.js, Go or comparable back-end is preferred, but I’m open to other proven stacks if you can demonstrate equal or better performance and security. The matching engine has to clear thousands of orders per second with deterministic execution and transparent fee calculation. Deliverables • Responsive web UI for spot trading • Matching engine with REST & WebSocket APIs • Wallet system for BTC, ETH, XRP, USDT • Admin console for KYC/AML, user management and treasury controls • Full documentation (deployment, API, security hardening) • Source code delivered through a private Git repository, ready for containerised deployment (Docker/Kubernetes) Acceptance will be based on a successful end-to-end demo on a staging server, security test results, and smooth deployment to my production environment.