> Markdown version of [/@hartmut-armbruster](https://www.wearedevelopers.com/@hartmut-armbruster). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Hartmut Armbruster Software architect at StoatFlow rethinking how we build and scale data streams. ## About Hartmut Armbruster is a software architect at StoatFlow who designs high-load distributed systems. He builds mission-critical data platforms for organizations like HSBC and Deutsche Bahn, focusing on architecture that matches actual engineering scale rather than defaulting to maximum complexity. His work centers on data streaming and reactive programming. He regularly challenges standard operational conventions, whether he is questioning the need to over-scale Kafka and Flink deployments or exploring practical methods to maximize Cassandra performance using Kotlin and Quarkus. ## Past Sessions ### World Congress 2026 Europe 路 July 8, 2026 Berlin, Germany - [What If We've Been Scaling Stream Processing Wrong All Along?](https://www.wearedevelopers.com/videos/100139-what-if-we-ve-been-scaling-stream-processing-wrong-all-along) 路 30 min 路 馃帴 Watch recording ### World Congress 2024 路 July 17, 2024 Berlin, Germany - [Maximising Cassandra's Potential: Tips on Schema, Queries, Parallel Access, and Reactive Programming](https://www.wearedevelopers.com/videos/1167-maximising-cassandra-s-potential-tips-on-schema-queries-parallel-access-and-reactive-programming) 路 30 min 路 馃帴 Watch recording ## Videos - [What If We've Been Scaling Stream Processing Wrong All Along?](https://www.wearedevelopers.com/videos/100139-what-if-we-ve-been-scaling-stream-processing-wrong-all-along) 路 Hartmut Armbruster - [Maximising Cassandra's Potential: Tips on Schema, Queries, Parallel Access, and Reactive Programming](https://www.wearedevelopers.com/videos/1167-maximising-cassandra-s-potential-tips-on-schema-queries-parallel-access-and-reactive-programming) 路 Hartmut Armbruster ## Links - [LinkedIn](https://www.linkedin.com/in/hartmut-co-uk/) - [Blog](https://thriving.dev/blog)