trading Archives - Kai Waehner

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5 minute read

Diskless Kafka at FinTech Robinhood for Cost-Efficient Log Analytics and Observability

ByKai Waehner
22. January 2026

Diskless Kafka is transforming how fintech and financial services organizations handle observability and log analytics. By using the Kafka protocol with cloud-native object storage, companies like Robinhood reduce infrastructure costs and gain elastic scalability. This article explores how Robinhood leverages Kafka, Flink, and WarpStream to build a real-time platform that supports trading, monitoring, and compliance at scale.

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9 minute read

Energy Trading with Apache Kafka and Flink

ByKai Waehner
28. June 2024

Energy trading and data streaming are connected because real-time data helps traders make better decisions in the fast-moving energy markets. This data includes things like price changes, supply and demand, smart IoT meters and sensors, and weather, which help traders react quickly and plan effectively. As a result, data streaming with Apache Kafka and Apache Flink makes the market clearer, speeds up information sharing, and improves forecasting and risk management. This blog post explores the use cases and architectures for scalable and reliable real-time energy trading, including real-world deployments from Uniper, re.alto and Powerledger.