Krzysztof Kiewicz
Founding Engineer at Quesma
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolKrzysztof Kiewicz is a founding engineer and backend-focused software developer with 11 years of experience building reliable systems and shipping production C++ and Python code. He has deep expertise in distributed filesystems and low-level engineering, demonstrated by substantive contributions to the open-source LizardFS project where he improved client reliability and modernized test automation. A pragmatist who has moved between startups and research teams, he built CUDA-accelerated ML components and optimized scientific simulations, cutting runtimes in half. Based in Warsaw, he combines formal training in computer science, mathematics and econometrics with hands-on startup experience as a founder and early engineer. Colleagues know him as a detail-oriented “nerd from Warsaw” who gravitates toward hard systems problems and improving testability and concurrency in legacy codebases.
11 years of coding experience
5 years of employment as a software developer
Master of Science - MS Computer Science, Master of Science - MS Computer Science at Københavns Universitet - University of CopenhagenBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at University of WarsawMaster's degree Econometrics and Quantitative Economics, Master's degree Econometrics and Quantitative Economics at SGH Warsaw School of Economics
Polish, English, German, Spanish, Russian
Github Skills (16)
linux10
c-language10
distributed-systems10
cprogramming-language10
testing10
storage9
data-storage9
bash8
cplus7
cpp7
fault-tolerance6
high-performance6
high-availability6
distributed-computing6
posix5
Programming languages (2)
Github contributions (5)
lizardfs/lizardfs
Sep 2019 - Feb 2021
LizardFS is an Open Source Distributed File System licensed under GPLv3.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:17 commits, 2 comments in 1 year 5 months
Contributions summary:Krzysztof primarily focused on improving the LizardFS client and its testing infrastructure. Their contributions include fixing a critical bug in the `readdir` function, which improved the reliability of the mount client. They also addressed inconsistencies in class names and fixed issues related to debug information in the chunkserver. Furthermore, they made changes to multiple test cases by replacing deprecated configurations, removing obsolete flags and adding features to run tests concurrently.
erasure-codingaccelerationc-plus-plusload-balancingfault-tolerance
QuesmaOrg/quesma
Jul 2024 - Apr 2025
Programmable database gateway
Contributions:128 reviews, 267 PRs, 1112 pushes in 8 months
clickhousedatabaseelasticsearchgatewaykibana
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