Designing a High-Throughput Algorithmic Trading Platform on AWS: Architecture for 15,000 Concurrent Users

A production-realistic architecture for a cloud-native algorithmic trading platform: 15,000 concurrent users, sub-second order acknowledgement, real-time market data streaming, CQRS, event sourcing, and the async-sync bridge that holds it all together. The hardest problems in financial software are not algorithmic. They are architectural. A trading platform must be correct before it is fast,…