Oliver Breitwieser
Senior Software Engineer at freiheit.com technologies
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolOliver Breitwieser is a Senior Software Engineer and team lead based in Hamburg with 16 years of experience building robust, production-grade systems and developer tooling. Trained as a physicist (Dr. rer. nat., Heidelberg University), he bridges research and engineering—having operated neuromorphic compute platforms, deployed ML models to specialized hardware, and established containerized CI/CD workflows for dozens of concurrent scientific users. At freiheit.com technologies he progressed from software engineer to team lead and now senior engineer, focusing on backend and DevOps practices. A long-time open-source contributor, he has improved the widely used Spack package manager by adding packages, refining build logic, and modernizing filesystem abstractions. Known for pragmatic automation and sustainable developer workflows, he pairs deep technical rigor with a taste for unconventional hardware—turning coffee into instructions for both ML experiments and production infrastructure.
16 years of coding experience
7 years of employment as a software developer
Doctor of Natural Sciences (Dr. rer. nat.), Physics, Magna Cum Laude, Doctor of Natural Sciences (Dr. rer. nat.), Physics, Magna Cum Laude at Heidelberg University
Github Skills (14)
packaging10
package-management10
package10
python10
linux9
build-tools9
version-control9
scripting7
scientific-computing7
package-manager-tool7
script7
sh7
shell7
package-manager7
Programming languages (13)
Github contributions (5)
spack/spack
Nov 2016 - Feb 2020
A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:34 commits, 27 PRs, 125 comments in 3 years 3 months
Contributions summary:Oliver primarily contributed to the Spack package manager, adding support for new packages and updating existing ones. Their work involved modifying package definitions (package.py files) to incorporate new versions, update URLs, and manage dependencies. They also made improvements to the Spack build system itself, including adding the ability to choose the link function and supporting verbosity when activating packages. Additionally, they updated existing code, fixed spelling errors, and refactored code to use filesystem abstractions.
compilerspythonradiussplatformslinux
obreitwi/dot_zsh
Sep 2013 - Jan 2023
Contributions:442 commits, 381 pushes in 9 years 5 months
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