Tomasz Lelek
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Tomasz Lelek

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In his professional Software Engineering career, Tomasz has worked on various production services, architectures, and programming languages (mostly JVM). He has production experience with monolith and microservices architectures. He has designed systems that handle tens of millions of unique users and hundreds of thousands of operations per second. He has worked in: - Microservices architecture with CQRS (using Apache Kafka) - Marketing automation and event stream processing - Big data processing with Apache Spark and Scala Tomasz now works at Dremio, where he helps create a modern data lakehouse solution. Before that, he was working at DataStax, building a variety of products around the Cassandra Database. He designed tools for thousands of developers for whom API design, performance, and UX friendliness play a crucial part. He contributed to Java- Driver, Cassandra Quarkus, Cassandra-Kafka connector, and Stargate.
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