Jan Müller is a Senior Software Engineer based in Vienna with nine years of hands-on experience across frontend and backend development, currently advancing to a senior role at Senacor Technologies. He holds top‑graded degrees from University of Kassel and TU Wien (Master’s with distinction) and blends practical engineering with a strong interest in algorithms, data structures, and software architecture. An active open-source contributor, Jan has improved the UI and developer experience of notable projects like vitest by adding features such as a module graph and resizable sidebars. He treats programming as a craft, iterating on code style and architecture through hobby projects and using them as deliberate learning platforms. Known for teaching and mentoring as a university grader and tutor, he pairs technical depth with the ability to explain concepts clearly. Outside work, he draws creative inspiration from music, walks, and science fiction, which helps him tackle tricky problems with persistence and imagination.
9 years of coding experience
4 years of employment as a software developer
Vienna University of Technology
Bachelor of Science - BS, Computer and Information Sciences, General, 1.0 with distinction, Bachelor of Science - BS, Computer and Information Sciences, General, 1.0 with distinction at University of Kassel
Next generation testing framework powered by Vite.
Role in this project:
Front-end Developer
Contributions:22 reviews, 24 commits, 29 PRs in 7 months
Contributions summary:Jan primarily contributed to the UI of the `vitest-dev/vitest` repository. Their work includes fixing UI navigation issues, implementing resizable sidebars using `splitpanes`, adding a module graph feature for visualizing dependencies, and making the module graph and task item displays more stable. They also contributed to general UI improvements such as preventing line wrapping and reducing the graph container size.
Contributions:78 pushes, 17 branches in 2 years 2 months
testingtest-frameworkvite
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