Jari Pöyhönen
Senior Embedded Software Engineer, GNSS at u-blox
Oulu, Mainland Finland
Summary
👤
Senior🎓
Top SchoolJari Pöyhönen is a Senior Embedded Software Engineer with over two decades of experience and eight years in his current focused domain, delivering high-performance GNSS, cellular and BLE solutions for consumer, industrial and wearable devices. He combines hands-on C/C++ implementation, system architecture and performance optimization with verification automation (Python, Robot, Jenkins) and chipset-level driver expertise across diverse embedded platforms. Jari has led cross-functional, geographically distributed R&D projects and built QA teams with direct people management, routinely coordinating suppliers and partners in agile value teams. His open-source contributions to Arm Mbed OS—improving the cellular framework, fixing binary compatibility and hardening tests—underscore a pragmatic emphasis on robustness and security in IoT stacks. Known for translating complex wireless protocols and HW/SW interfaces into production-ready products, he thrives where performance and quality matter.
8 years of coding experience
24 years of employment as a software developer
Bachelor of Engineering (BEng), Electrical Engineering / Computer Systems Engineering, Bachelor of Engineering (BEng), Electrical Engineering / Computer Systems Engineering at Tampere University Of Applied Sciences
Finnish, English, Norwegian
Github Skills (8)
unit-testing10
mbed10
iot10
embedded10
c-language10
cprogramming-language10
sys10
valgrind9
Programming languages (2)
Github contributions (5)
ARMmbed/mbed-os
Feb 2018 - Feb 2019
Arm Mbed OS is a platform operating system designed for the internet of things
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:10 commits, 5 PRs, 22 comments in 1 year
Contributions summary:Jari focused on enhancing the cellular framework within the Mbed OS repository. They implemented poll support for the multiplexer and modified the user data transmission to handle arbitrary sizes, reflecting a focus on improving data handling capabilities. Furthermore, the user updated unit tests, particularly for the cellular device and AT handler stubs, addressing valgrind errors and removing sensitive information from trace logs, suggesting an emphasis on debugging and security within the cellular module. Additionally, the user retired the CellularBase class and fixed binary compatibility, indicating significant contributions to the cellular module's architecture.
kernelmbed-osoperating-systemlinuxmbed
blind-owl/mbed-os
Aug 2017 - May 2019
ARM mbed OS is a platform operating system designed for the internet of things
Contributions:380 pushes, 17 branches in 1 year 9 months
kernelmbed-osoperating-systemlinuxmbed
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