Piotr Kosycarz
Senior Software Test Developer Team Lead at Nordic Semiconductor
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolPiotr Kosycarz is a Senior Software Test Developer and team lead based in Krakow with a strong embedded systems and IoT testing background. Over a decade of hands-on experience spans embedded C/C++, Python test frameworks, CI automation, and power-optimized firmware testing for platforms like Nordic’s nRF Connect and the Zephyr RTOS. At Nordic Semiconductor he designs and leads test strategies, implements tooling and reviews test code, while his open-source contributions improve Twister test coverage and multicore/power benchmarks for widely used repos like nrfconnect/sdk-nrf and zephyrproject-rtos. He has also built serverless geospatial data pipelines and automated satellite-based analytics, demonstrating an uncommon blend of telecom-grade embedded expertise and cloud-native data engineering. Known for integrating automated testing into delivery pipelines and squeezing power out of constrained hardware, he excels at turning complex hardware-software requirements into reproducible, measurable test suites.
4 years of coding experience
9 years of employment as a software developer
Magister (Mgr) Elektronika i Telekomunikacja - specjalność Systemy wbudowane, Magister (Mgr) Elektronika i Telekomunikacja - specjalność Systemy wbudowane at AGH University of Krakow
Polish, English
Github Skills (25)
uart10
testing10
cover10
embedded-language10
zephyr-rtos10
coverage10
microcontroller10
zephyr10
gpio10
rtos10
sys10
code-coverage10
embedded10
python9
spi9
Programming languages (2)
Github contributions (5)
nrfconnect/sdk-nrf
Apr 2022 - Apr 2022
nRF Connect SDK main repository
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:655 reviews, 1 commit, 348 PRs in 1 day
Contributions summary:Piotr primarily contributed to tests and benchmarks within the nRF Connect SDK, focusing on power consumption and multicore testing. They implemented tests for various peripherals like UART, GPIO, I2C, and SPI, and also for clock control and flash operations. A significant part of their work involves adding sleep modes and power-saving techniques specific to the nRF54l15 platform. The user also addressed issues and improved code related to multicore applications.
connect-sdknrf-connect-sdkinfinibandlteppp
zephyrproject-rtos/zephyr
Apr 2022 - Apr 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:163 reviews, 53 PRs, 277 comments in 2 years 11 months
Contributions summary:Piotr primarily contributes to the Zephyr RTOS project, focusing on extending and improving the test framework (Twister) and supporting coverage analysis. The user implemented features for shuffling tests and storing run IDs. They also made several changes related to coverage data handling, including extending timeouts, enabling direct console output, and improving the processing of coverage data. Furthermore, the user has modified test cases, samples, and board-specific configurations to enable and enhance coverage analysis, particularly for hardware testing.
bluetooth-lereal-timezephyrsecuregit-repository
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