Jochen Klein
Research Physicist at CERN
Kentucky, Switzerland
Summary
👤
Senior🎓
Top SchoolJochen Klein is a research physicist with 12 years of experience combining fundamental particle physics at CERN’s ALICE experiment with hands-on software and build engineering. He leads ALICE upgrade coordination while contributing significant back-end work to flagship ALICE projects (AliRoot, AliceO2, AliPhysics) — notably adding jet-finding, FastJet integration, TRD GTU simulation fixes, and robust build recipes across complex dependencies. Equally comfortable in embedded, HPC and big-data environments, he bridges low-level systems, online tracking and large-scale analysis workflows. His work spans international team coordination and DevOps-style infrastructure improvements, reflecting a rare mix of experimental physics insight and production-grade software craftsmanship. An amusingly pragmatic coder (If everybody's debugging, who's gonna implement the bugs?), he thrives on turning detector challenges into reproducible, deployable code.
12 years of coding experience
6 years of employment as a software developer
PhD, Physics, PhD, Physics at Heidelberg UniversityVordiplom, Physics and Mathematics, Vordiplom, Physics and Mathematics at University of Kaiserslautern
German, English, Italian, French, Spanish
Github Skills (32)
algorithm10
dependency-management10
simulation10
algorithms10
root-view10
c-language10
simulator10
simulations10
data-modeling10
alice10
bash10
analyse10
high-energy-physics10
cmake10
exp10
Programming languages (10)
Github contributions (5)
alisw/AliPhysics
Oct 2013 - Mar 2020
ALICE Analysis Repository
Role in this project:
Backend Developer & Physicist
Backend Developer & PhysicistContributions:144 commits, 36 PRs, 77 comments in 6 years 6 months
Contributions summary:Jochen primarily contributed to the ALICE physics analysis repository by developing and adapting generator macros for various physics simulations. Their work involved creating and modifying macros for Pythia 6, AMPT, DPMJET, and Herwig generators, adapting them for different collision energies and experimental setups. The user's contributions included implementing features like on-the-fly training for EPOS-LHC and integrating online trigger information, demonstrating a focus on generating and analyzing simulated particle interactions.
physicspythoncernanalysisalice
alisw/AliRoot
Oct 2013 - Mar 2020
ALICE Software Framework
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 121 commits, 6 PRs in 6 years 6 months
Contributions summary:Jochen primarily contributed to the ALICE Software Framework by fixing and enhancing the TRD (Transition Radiation Detector) module. Their work focused on addressing issues related to the GTU (Global Tracking Unit) simulation and implementing features for track reconstruction and online tracking. The commits show the user modifying code related to track merging, z-position calculations, and data handling within the TRD framework, including fixing raw data simulation and updating the late conversion rejection.
physicscernframeworkalicealice-experiment
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