In this episode of the ARCHITECHT Show, Stephan Ewen discusses the open source stream-processing system Apache Flink (which he helped create) and the commercial platform data Artisans (of which he's co-founder and CTO) is building around it. Ewan covers some of the major use cases for stream processing and some of Flink's biggest users -- including Alibaba -- and the challenges of standing out against, and sometimes working alongside, established projects such as Apache Spark, Apache Storm and Apache Kafka.