Leonhard Reichenbach - Doctoral Student at CERN

Leonhard Reichenbach

Doctoral Student at CERN

Meyrin, Geneva, Germany

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Summary

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Senior

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Leonhard Reichenbach is a doctoral student at CERN with nine years of software and research experience at the intersection of high-energy physics and systems engineering. He combines a strong academic background (MSc in Physics and Computer Science, PhD candidate) with hands-on contributions to critical infrastructure like the Spack package manager, where he maintains and packages scientific software including numpy, pandas and newly created memkind support. His work history spans experiment-focused reconstruction and particle ID research at DESY to kernel- and storage-level development for Lustre at the German Climate Computing Center, reflecting comfort from low-level systems to analysis stacks. Based in Meyrin/Geneva, he’s building reconstruction software for future colliders while bringing practical expertise in build systems, dependency management and reproducible scientific computing.

9 years of coding experience

Doktor (Ph.D.), Physics, Doktor (Ph.D.), Physics at Rheinische Friedrich-Wilhelms-Universität Bonn

Master of Science - MS, Physics, 1.3, Master of Science - MS, Physics, 1.3 at Universität Hamburg

Github Skills (9)

package-manager-tool10

package-manager10

python10

package-management10

build-tools9

hpc8

git7

c-language6

cprogramming-language6

Programming languages (6)

C++CJavaScriptGoJupyter NotebookPython

Github contributions (5)

spack/spack

Mar 2018 - May 2019

A flexible package manager that supports multiple versions, configurations, platforms, and compilers.

Role in this project:

Back-end Developer & Package Maintainer

Contributions:12 commits, 14 PRs, 21 comments in 1 year 2 months

Contributions summary:Leonhard primarily contributes to the Spack package manager by adding and updating package definitions. Their work involves integrating new versions of existing software packages like `patch`, `bazel`, and Python libraries such as `pandas`, `bottleneck`, `scikit-learn`, and `numpy`. The user also created a new package for `memkind`, showcasing expertise in package management and build system integration. This included handling dependencies, applying patches, and adapting to compiler versions.

compilerspythonradiussplatformslinux

Zehvogel/enuW

May 2023 - Apr 2025

Contributions:106 pushes, 1 branch, 3 issues in 1 year 10 months

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