Lennard Eijsackers is a Senior Software Engineer on the Data Plane Team at ClickHouse since August 2025, with a robust background in software engineering and data engineering. Prior experience includes serving as a Senior Software Engineer at Contentsquare from January 2022 to July 2025, and working at Essent as a Data Engineer from July 2021 to January 2022. Eijsackers also held roles as a Data Engineer and DevOps chapter lead at CarePay from May 2018 to June 2021, contributing to various data projects. Previous experience includes a position as a Technical Business Engineer at Finaps, where innovative IT solutions were delivered, and a role as a Student Assistant at JobMotion B.V. Eijsackers holds a Master’s degree in Mathematics with a focus on Applied Statistics for Life and Behavioral Sciences, as well as a Bachelor’s degree in Molecular Science and Technology, both from Leiden University.
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