Jonathan Kliem
Senior Software Consultant at TNG Technology Consulting
Panketal, Brandenburg, Germany
Summary
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Rockstar🎓
Top SchoolJonathan Kliem is a Senior Software Consultant based in Panketal, Germany, with seven years of experience bridging research-grade mathematics and applied software engineering. He progressed from academic research at Freie Universität Berlin to consulting at TNG Technology Consulting, where he now advises and implements backend solutions. Jonathan holds advanced degrees in mathematics (MSc and ongoing/PhD-level work) and brings rigorous problem-solving and statistical thinking to complex codebases. An active open-source contributor, he has improved core components of the widely used SageMath project, focusing on matrix code quality and random seed correctness—an attention to detail that reflects in his consulting work. Colleagues rely on him for meticulous code hygiene, reproducibility fixes, and translating mathematical models into dependable production software. He combines academic depth with practical delivery, making him adept at solving subtle algorithmic and reliability challenges in production environments.
7 years of coding experience
7 years of employment as a software developer
Doctor of Science, Mathematics, Doctor of Science, Mathematics at Freie Universität BerlinBachelor of Science - BS, Mathematics, Bachelor of Science - BS, Mathematics at Friedrich Schiller University JenaMaster of Science - MS, Mathematics, Master of Science - MS, Mathematics at Humboldt University of Berlin
Github Skills (5)
python10
matrix9
mat9
testing8
linear-algebra8
Programming languages (8)
Github contributions (5)
sagemath/sage
Feb 2019 - Feb 2023
Main repository of SageMath
Role in this project:
Back-end Developer
Back-end DeveloperContributions:25 reviews, 1296 commits, 4 PRs in 4 years
Contributions summary:Jonathan made several code style fixes and general improvements to the code base, especially within the "src/sage/matrix" directory, as well as fixing a doctest. These changes involve cleaning up and ensuring that the code adheres to specific standards. Also, it seems like the user is trying to fix a problem with the seed of the random generators.
kliem/sage
Dec 2022 - Feb 2023
Contributions:4 commits, 61 PRs, 141 pushes in 2 months
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