Harun Zengin
Senior Software Engineer at sonnen GmbH
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolHarun Zengin is a Senior Software Engineer based in Berlin with nine years of experience building high-throughput distributed systems, especially in process mining, big data and energy storage telemetry. He designs and operates real-time pipelines and Cassandra-backed architectures at sonnen, contributing to open-source Elixir tooling and improving leader election and fault tolerance in production. Comfortable across Elixir, Rust, Scala and AWS, he has a track record of moving data from hot Cassandra clusters to cold storage for analytics and ML while cutting costs. Beyond product work he has led rapid-response civic-tech projects—directing a 10-person team that delivered a national-scale ticketing platform in weeks and helped distribute 30,000 bus tickets after the 2023 earthquakes. He pairs systems-level thinking with a penchant for functional programming and embedded-style efficiency, making him equally at home optimizing databases or designing execution engines.
9 years of coding experience
4 years of employment as a software developer
Bachelor's degree Computer Engineering, Bachelor's degree Computer Engineering at Boğaziçi University
Turkish, German, English
Stackoverflow
43reputation
3kreached
2answers
5questions
Github Skills (28)
cassandra10
cassandra-driver10
scylla9
elixir9
jupyter-kernels7
social-media6
apache-kafka6
clickhouse6
parsing6
linux6
spark-streaming6
livy6
scala6
apache-spark6
react5
Programming languages (3)
Github contributions (5)
harunzengin/xandra
Jan 2023 - Dec 2024
Fast, simple, and robust Cassandra driver for Elixir. Forked for debugging purposes.
Contributions:77 pushes, 14 branches in 1 year 10 months
harunzengin/riot_udp_echo_server
Mar 2018 - Mar 2018
Contributions:5 pushes, 1 branch in 4 days
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