Explore architectural patterns for building highly scalable and available trading systems in this conference talk. Delve into nontraditional approaches that balance high throughput, low latency, and high availability requirements. Learn how to process hundreds of thousands of business events per second, react to thousands of transactions, and distribute data to tens of thousands of concurrent users in millisecond-critical environments. Discover techniques used in large-scale trading systems, including synchronous and asynchronous transaction registrations, casual eventual consistency, and graceful failure handling. Examine the challenges of exponential business growth, reactive systems, and technical environments. Gain insights into incident management, realtime reactive systems, and important learning points for implementing these patterns effectively.