Paweł Gontarz
Staff Data Engineer
Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolPaweł Gontarz is a Senior Data Engineer and team lead with a decade of experience designing and operating distributed data systems, currently leading data engineering at Contentsquare. He combines hands‑on backend development (notably contributions to an open‑source ClickHouse proxy with Redis-based distributed caching and improved query handling) with people leadership across growing analytics teams. Comfortable in Scala and large-scale query infrastructures, Paweł has progressed from junior roles to technical lead positions while staying deeply involved in implementation and reliability work. Based in Masovian Voivodeship, Poland, he brings a pragmatic focus on performance, concurrency and observability—often tackling subtle edge cases in query caching and error propagation that improve production robustness.
11 years of coding experience
8 years of employment as a software developer
Warsaw University of TechnologyUPC Universitat Politècnica de Catalunya
Github Skills (8)
caching10
proxy10
go10
concurrency10
clickhouse10
redis9
load-balancer9
testing8
Programming languages (7)
Github contributions (5)
ContentSquare/chproxy
Feb 2021 - Sep 2022
Open-Source ClickHouse http proxy and load balancer
Role in this project:
Back-end Developer
Back-end DeveloperContributions:140 reviews, 19 commits, 43 PRs in 1 year 7 months
Contributions summary:Paweł significantly contributed to the ClickHouse proxy project by implementing features related to query handling and caching. They added support for the `WITH` query, enabling caching for queries starting with that statement. Furthermore, they implemented a distributed cache using Redis, enhancing the proxy's caching capabilities, and made improvements to handle concurrent queries and error propagation. They also addressed issues like failing test cases and improved the health check mechanism and code refactoring.
clickhousehttp-proxyload-balancerproxyclickhouse-proxy
Garnek20/centrala
Nov 2015 - Jan 2017
Contributions:7 pushes, 1 branch in 1 year 1 month
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