Grzegorz Chwierut
Senior R&D Engineer at Nordic Semiconductor
Krakow, Lesser Poland Voivodeship
Summary
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Rockstar🎓
Top SchoolGrzegorz Chwierut is a Senior R&D Engineer based in Krakow with over a decade of hands-on experience in embedded systems, C development, and automated testing. He has driven Linux and Docker-based test environments, Jenkins pipelines, and Python tooling to maintain fully automated build-and-test systems for networking and IoT products. At Nordic Semiconductor and previously Motorola, he combined low-level DSP/FPGA work with system integration, porting complex router code to RHEL and containerized platforms. An active contributor to the Zephyr RTOS test tooling, he has improved the twister test runner and added pytests and simulation support—showing a knack for improving test infrastructure in prominent open-source projects. Comfortable across Python, C/C++, Bash and tooling like Git and Jira, he excels at debugging, unit testing and troubleshooting in constrained environments. Notably, his background bridges research-grade FPGA/VHDL projects and production-grade network software, giving him a rare perspective across hardware and software stacks.
3 years of coding experience
15 years of employment as a software developer
AGH University of Krakow
Github Skills (12)
embedded-language10
embedded10
rtos10
pytest10
zephyr10
testing9
test-automation9
realtime9
bluetooth7
microcontroller7
iot7
bluetooth-le7
Programming languages (2)
Github contributions (5)
zephyrproject-rtos/zephyr
Sep 2022 - Mar 2025
Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:333 reviews, 40 PRs, 283 comments in 2 years 6 months
Contributions summary:Grzegorz's contributions primarily center around the Zephyr RTOS, specifically related to the "twister" test runner. They addressed issues with hardware map updates, refactoring and extending the quarantine implementation, and adding pytests. Additionally, the user worked on documentation updates and improved features like regular expressions and simulations. The user's work involves modifying test execution and reporting tools.
bluetooth-lereal-timezephyrsecuregit-repository
gchwier/twister
Nov 2022 - Apr 2023
Twister v2 (under development; not for production use)
Contributions:115 pushes, 36 branches in 5 months
not-for-productionunder-developmenttwisteruse-productionproduction
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