Bence Kosztolnik
Software Developer at Cloudera
Budapest, Hungary
Summary
🤩
Rockstar🎓
Top SchoolBence Kosztolnik is a software developer based in Budapest with about three years of professional experience and a longer history of hands-on engineering roles across Hungarian and international companies. He currently works at Cloudera and has contributed to high-profile open-source projects such as Apache Hadoop, fixing UI rendering issues and addressing CVEs in YARN that improved both security and reliability. Comfortable across backend systems and testing infrastructure, he’s demonstrated care for correctness by enhancing resource-tracking tests and adapting code for new cluster states. Trained in Computer Software Engineering at Budapest University of Technology and Economics, Bence combines solid academic grounding with practical, production-focused contributions to large distributed systems. An attentive problem-solver, he often surfaces subtle UI and state-handling bugs that others miss.
4 years of coding experience
7 years of employment as a software developer
Computer Software Engineering, Computer Software Engineering at Budapest University of Technology and Economics
Github Skills (6)
apache-hadoop10
debugging10
javas10
java10
testing10
webui9
Programming languages (3)
Github contributions (5)
apache/hadoop
Oct 2022 - Dec 2022
Apache Hadoop
Role in this project:
Backend Developer
Backend DeveloperContributions:123 reviews, 7 commits, 34 PRs in 1 month
Contributions summary:Bence contributed to the Apache Hadoop project by addressing various bugs and implementing enhancements to existing code. They upgraded DataTables to fix CVEs in the YARN module, improving UI rendering. The user also fixed an issue where RM UI, RMAttemptBlock could not render FINAL_SAVING and made changes to accommodate the new state in multiple files. Additionally, the user enhanced the TestResourceTrackerService, ensuring testNodeRemovalNormally behaved correctly.
apache-hadoophadoop
K0K0V0K/hadoop
Jul 2022 - Mar 2026
Apache Hadoop
Contributions:211 pushes, 33 branches in 3 years 8 months
apachebig-datasparkhadoopjava
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