Explore the world of reactive, cloud-native applications in this conference talk from NDC Oslo. Discover how to build systems with real-time execution guarantees that can handle unpredictable service demand and network failures. Learn about the common challenges faced in diverse domains such as sports betting, dynamic pricing, multi-player games, and algorithmic trading. Delve into the importance of sub-millisecond reaction times, decentralized architecture, and horizontal scalability. Gain insights on leveraging Akka.NET, Kubernetes, and gRPC to create robust, high-performance applications that can meet the demanding requirements of modern, latency-sensitive systems.