Kari Hämäläinen
Staff R&D Engineer at Nordic Semiconductor
Tampere, Pirkanmaa, Finland
Summary
🤩
Rockstar🎓
Top SchoolKari Hämäläinen is a Staff R&D Engineer based in Tampere with ~15 years of experience across semiconductors, telecom and AI, currently advancing Nordic Semiconductor’s engineering efforts. He blends deep domain expertise in LTE/5G system-level research and simulation with practical DevOps and ML infrastructure skills honed at NVIDIA and u-blox. Kari has a track record of modernizing embedded development pipelines—introducing containerized CI/CD, automated testing and toolchain Docker images—and contributed CI automation for the prominent nRF Connect SDK to streamline Zephyr upmerges. Comfortable at the intersection of research and production, he codes in C++ and Python, builds scalable training and build systems, and mentors teams on R&D best practices. His background in telecommunications research (M.Sc.) gives him rare insight into both physical-layer theory and hands-on systems engineering.
4 years of coding experience
13 years of employment as a software developer
M.Sc, Telecommunications, M.Sc, Telecommunications at Tampere University of Technology 1965-2018
Github Skills (12)
github-ci10
bash10
docker10
githubaction-workflow10
dockers10
build-automation10
cicd10
scripting9
git9
zephyr8
sys7
embedded7
Programming languages (4)
Github contributions (5)
nrfconnect/sdk-nrf
Dec 2021 - Jan 2023
nRF Connect SDK main repository
Role in this project:
DevOps Engineer
DevOps EngineerContributions:97 reviews, 8 commits, 77 PRs in 1 year 1 month
Contributions summary:Kari focused on enhancing the CI/CD pipeline and automating the build process for the nRF Connect SDK. They introduced a GitHub Action to perform Zephyr upmerges and create pull requests, improving integration with the Zephyr project. Additionally, the user created scripts and Dockerfiles for building and releasing a Docker image containing the Nordic toolchain, streamlining the development environment. They also made iterative improvements to the Docker image and CI process.
nrf-connect-sdk
karhama/sdk-nrf-testing
Feb 2022 - Feb 2025
Test repository, do not submit PRs here.
Contributions:11 PRs, 17 pushes, 8 branches in 3 years
test-repositorytestingprssubmit
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