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Piotr Kosycarz

PROFILE

Piotr Kosycarz

Piotr Kosycarz developed and maintained embedded systems infrastructure across the nrfconnect/sdk-nrf repository, focusing on hardware enablement, automated testing, and power benchmarking for Nordic platforms. He engineered robust driver and board configurations, expanded test coverage for UART, SPI, and Bluetooth Low Energy, and improved CI/CD reliability using Python and C. By refining device tree overlays, optimizing memory usage, and introducing quarantine workflows, Piotr enabled faster validation and safer releases. His work integrated cross-platform build systems and advanced benchmarking, resulting in broader hardware support, reduced deployment risk, and traceable, maintainable code that accelerated onboarding and improved release quality.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

419Total
Bugs
60
Commits
419
Features
186
Lines of code
21,319
Activity Months13

Work History

October 2025

42 Commits • 17 Features

Oct 1, 2025

October 2025 monthly performance summary: Delivered platform deprecation cleanup, stability improvements for LV10 configurations, and enhancements to CI, quarantine tooling, and test coverage across sdk-zephyr, sdk-nrf, and nxp-upstream Zephyr. Key outcomes include configuration simplification, reduced nondeterminism in LV10 DTS, improved peripheral reliability, and expanded LV10/ns support, all contributing to faster, more predictable releases and safer platform evolution.

September 2025

53 Commits • 26 Features

Sep 1, 2025

September 2025 highlights: LV10 readiness and stability expanded across core Nordic/NRF and Zephyr projects, delivering memory-conscious security improvements, broader hardware support, and stronger test automation. The month focused on business value through RAM optimization, LV10-enabled builds, and improved CI/test coverage, enabling faster validation and faster time-to-market for LV10-capable boards and features.

August 2025

31 Commits • 18 Features

Aug 1, 2025

August 2025 monthly summary: Delivered stability, performance, and validation improvements across three repositories (nrfconnect/sdk-nrf, nxp-upstream/zephyr, nrfconnect/sdk-zephyr). Key work focused on boot stability for Nordic hardware, LV10 feature enablement, security/testing enhancements, and test infrastructure uplift, delivering tangible business value through more reliable hardware validation, faster debugging, and stronger security validation.

July 2025

28 Commits • 15 Features

Jul 1, 2025

July 2025 monthly summary for nrfconnect/sdk-nrf. Focused on strengthening CI/test reliability, stabilizing security-related code, and delivering targeted tests/benchmarks improvements that enhance release readiness and power/radio performance validation. Key outcomes include: streamlined CI/test execution with flexible rule handling; improved test and sample configurations for LV10/LM20 platforms; security reliability hardening; and richer power/performance benchmarking support.

June 2025

47 Commits • 12 Features

Jun 1, 2025

June 2025 monthly summary for nrfconnect/sdk-nrf focusing on hardware enablement, CI improvements, and power/performance instrumentation to accelerate validation, reduce risk, and improve traceability across Nordic platforms.

May 2025

27 Commits • 10 Features

May 1, 2025

May 2025 monthly summary: Delivered cross-repo hardware enablement and platform expansion across nrfconnect/sdk-nrf and AmbiqMicro/ambiqzephyr, enhancing hardware coverage, testing reliability, and developer efficiency. Key outcomes include broad LM20 DK enablement across samples, drivers, tests, and crypto/keys; LV10 platform support across samples, tests, and boards with explicit default versions and LV10 testing enablement; and Nordic LV10 DK support with SDC and initial Bluetooth samples. The USB HID Mouse sample now ships with a default configuration, improving onboarding and out-of-box usability. Maintenance and CI health were strengthened through quarantine of unstable drivers and updates to CI/test dependencies and CODEOWNERS. Demonstrated breadth of technologies and skills, including Zephyr RTOS bring-up, hardware bring-up on LM20/LV10, SPI/UART/CSP packaging, Bluetooth, USB, and automated testing fixtures for improved reliability.

April 2025

56 Commits • 29 Features

Apr 1, 2025

April 2025 performance summary for the development team: expanded Nordic LM20/LV10 DK readiness and test coverage, reinforced core subsystems (USB, watchdog, system_off, retained_mem), and improved CI/do x ygen hygiene. Delivered tangible business value through broader hardware support, more robust samples and tests, and clearer traceability from commits to outcomes.

March 2025

23 Commits • 9 Features

Mar 1, 2025

March 2025 monthly summary for nrfconnect/sdk-nrf focused on expanding hardware coverage, stabilizing test infrastructure, and optimizing resource usage to accelerate product validation and release readiness.

February 2025

40 Commits • 14 Features

Feb 1, 2025

February 2025 (2025-02) monthly summary for nrfconnect/sdk-nrf: Delivered extensive test and quality improvements across UART, SPI, I2C, and DMIC drivers, enhanced quarantine and CI tagging governance, and expanded test infrastructure for qdec/settings with clear ownership. These changes improved validation coverage, reduced release risk, and strengthened traceability and debugging capabilities.

January 2025

40 Commits • 24 Features

Jan 1, 2025

Concise monthly summary for 2025-01 focusing on delivering measurable business value and robust technical improvements across two Nordic SDKs. The month emphasized increasing benchmark reliability, expanding test coverage, and strengthening CI validation to accelerate feature delivery and reduce risk in production deployments.

December 2024

5 Commits • 1 Features

Dec 1, 2024

Month: 2024-12 — Focused on reliability, stability, and governance for the NordicBuilder/sdk-nrf repository. Completed key bug fixes for sensor data integrity and test suite stability, plus governance updates to streamline code reviews.

November 2024

24 Commits • 10 Features

Nov 1, 2024

November 2024 delivered a focused set of performance, stability and CI improvements across NordicBuild�r/sdk-nrf and kholia/zephyr. Key work included a comprehensive power and current consumption benchmarks suite extended across peripherals (qdec, adc, i2c, spi, timer, uart, flash) with multicore support for NRF54H20, plus CI readiness and test/spec updates. Added LPUART sample verification and fixtures to enable end‑to‑end LPUART validation. Expanded quarantine_zephyr tooling to enhance newlib thread-safety checks and llext support. Strengthened CI coverage for current consumption benchmarks and fixed hardware test reliability through targeted overlay/config changes (NRF54H20 FLPR core) and NRF54L15DK stability improvements.

October 2024

3 Commits • 1 Features

Oct 1, 2024

Month: 2024-10 — NordicBuilder/sdk-nrf: Delivered hardware flow-control configuration support across nRF54 and nRF52x boards, expanded configuration snippets to cover nRF52840/52832, and introduced a quarantine entry for sensor_hub ML app downloads to isolate a known issue. These changes improve cross-board UART reliability, accelerate onboarding of new boards, and reduce deployment risk for ML applications. Key business outcomes include broader hardware compatibility, fewer downstream issues, and clear traceability through commit messages and Jira linkage. Technologies demonstrated include YAML-based configuration, version-controlled code snippets, and cross-team collaboration with issue tracking.

Activity

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Quality Metrics

Correctness91.4%
Maintainability92.0%
Architecture88.8%
Performance85.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

BashCCMakeCMakeScriptConfConfigurationDevice TreeDoxygenKconfigN/A

Technical Skills

Audio DriversAutomated TestingBenchmarkingBluetoothBluetooth Low EnergyBoard ConfigurationBoard Support Package ConfigurationBuild ScriptsBuild System ConfigurationBuild SystemsBuild ToolsC ProgrammingCI/CDCI/CD ConfigurationCode Organization

Repositories Contributed To

6 repos

Overview of all repositories you've contributed to across your timeline

nrfconnect/sdk-nrf

Jan 2025 Oct 2025
10 Months active

Languages Used

CYAMLyamlCMakeCMakeScriptDevice TreeKconfigc

Technical Skills

BenchmarkingCI/CDCode Review ManagementConfigurationConfiguration ManagementDevOps

NordicBuilder/sdk-nrf

Oct 2024 Jan 2025
4 Months active

Languages Used

Device TreeYAMLCCMakeKconfigcmakeyamlText

Technical Skills

Configuration ManagementEmbedded SystemsEmbedded Systems ConfigurationHardware ConfigurationBenchmarkingCI/CD

nxp-upstream/zephyr

Aug 2025 Oct 2025
3 Months active

Languages Used

CYAMLPython

Technical Skills

Device ConfigurationDriver DevelopmentEmbedded SystemsHardware ConfigurationRTOSTesting

nrfconnect/sdk-zephyr

Aug 2025 Oct 2025
3 Months active

Languages Used

CYAML

Technical Skills

Driver DevelopmentEmbedded SystemsRTOSTestingBoard ConfigurationHardware Configuration

AmbiqMicro/ambiqzephyr

Apr 2025 May 2025
2 Months active

Languages Used

CYAML

Technical Skills

C ProgrammingDriver DevelopmentEmbedded SystemsTestingDevice Tree

kholia/zephyr

Nov 2024 Nov 2024
1 Month active

Languages Used

CYAML

Technical Skills

Device TreeDriver DevelopmentEmbedded SystemsEmbedded Systems ConfigurationTesting

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