Tamás Pénzes - Senior Engineering Manager at Cloudera

Tamás Pénzes

Senior Engineering Manager at Cloudera

Budapest, Hungary

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Summary

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Tamás Pénzes is a Senior Engineering Manager based in Budapest with 13 years of experience leading distributed teams and shipping critical components of large-scale operational databases. At Cloudera he built and now oversees the OpDB team responsible for Apache projects like HBase, ZooKeeper, Phoenix and Accumulo, combining hands‑on backend expertise with cross-timezone delivery. He contributes directly to flagship open-source projects (notably Apache HBase and ZooKeeper), adding tracing, refactors for backward compatibility, and modernization of tests and dependencies. With an MSc in Computer Science and an Executive MBA, he blends deep technical judgment with product and organizational leadership. Colleagues know him for turning legacy migrations and complex distributed-system issues into maintainable, testable code while mentoring engineers across six time zones.

13 years of coding experience

14 years of employment as a software developer

Study trip, Computer Science, Study trip, Computer Science at Universität Paderborn

Master of Business Administration (MBA), Executive MBA for IT, Master of Business Administration (MBA), Executive MBA for IT at University of Applied Sciences, Budapest

English, English at Stevenson College

Mechatronics, Mechatronics at Brassai Sámuel Technical Grammar School

Master of Science (MSc), Computer Science, Master of Science (MSc), Computer Science at Debreceni Egyetem

Hungarian, English, German

Github Skills (14)

javas10

configuration-management10

databases10

hbase10

distributed-systems10

thrift10

java10

database10

apache9

testing9

zookeeper9

distributed-database8

automations7

automation7

Programming languages (5)

JavaShellScalaGroovyRuby

Github contributions (5)

apache/zookeeper

Sep 2017 - Dec 2022

Apache ZooKeeper

Role in this project:

Back-end Developer

Contributions:4 reviews, 29 commits, 47 PRs in 5 years 3 months

Contributions summary:Tamás primarily contributes to the Apache ZooKeeper project by addressing coding style inconsistencies, specifically regarding the use of interface types versus implementation types. They also refactored code to remove usages of deprecated libraries and upgrade testing libraries. Their contributions include improvements to the project's testing frameworks. Additionally, the user was involved in updating dependency versions, eliminating JavaDoc warnings and refactoring the codebase by removing deprecated code.

zookeeperservice-discoverycloudnativeconfiguration-managementapache-zookeeper

apache/hbase

Aug 2017 - Apr 2020

Apache HBase

Role in this project:

Back-end Developer

Contributions:22 commits, 1 PR in 2 years 8 months

Contributions summary:Tamás made several contributions to the Apache HBase project. They modified the `DemoClient.java` file, adding functionality to configure the server principal for Thrift connections. They also fixed a `submit-patch.py` script to support UTF-8 encoding. Furthermore, the user refactored the Filter package, renaming methods and making the implementation backward compatible. Finally, the user upgraded the HTrace library and added tracing capabilities.

apache-hbaseapachedatabasejavahbase

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