Johannes Frey
Senior Software Engineer at vCluster
Blaubeuren, Baden-Württemberg, Germany
Summary
🤩
Rockstar🎓
Top SchoolJohannes Frey is a Senior Software Engineer with 10 years of experience in cloud-native platforms and Kubernetes, based in Blaubeuren, Germany. Currently at vCluster he contributes to the open-source vcluster project, improving vclusterctl with features like a "migrate values" command, stricter distro handling, Helm compatibility fixes, and safeguards that prevent risky distro/backing-store switches during upgrades. Before that he built and operated a fully managed Kubernetes platform for Mercedes‑Benz Tech Innovation, combining backend engineering with DevOps and platform reliability. He holds strong academic credentials (M.Sc. Computer Science and Media 1.2, B.Eng. Audiovisuelle Medien 1.5) and has hands-on experience from high-performance computing at HLRS to early web development, giving him a rare blend of operational rigor and tooling-focused engineering.
10 years of coding experience
9 years of employment as a software developer
Erstes Staatsexamen, Lehramt für Grundschulen (Mathematik, Deutsch, Sachunterricht), Erstes Staatsexamen, Lehramt für Grundschulen (Mathematik, Deutsch, Sachunterricht) at Universität Kassel1,2, 1,2 at Hochschule der Medien Stuttgart
German, English, French
Github Skills (16)
kubernetes-pod10
vcluster10
commandline-interface10
command-line-interface10
kubernetes10
go10
helm10
commandline10
command-line10
cli10
devops9
configuration-management9
multitenant8
multi-tenant8
multitenancy8
Programming languages (6)
Github contributions (5)
loft-sh/vcluster
Mar 2024 - Mar 2025
vCluster - Create fully functional virtual Kubernetes clusters - Each vcluster runs inside a namespace of the underlying k8s cluster. It's cheaper than creating separate full-blown clusters and it offers better multi-tenancy and isolation than regular namespaces.
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:196 reviews, 87 PRs, 4 pushes in 1 year 1 month
Contributions summary:Johannes primarily contributed to the `vclusterctl` tool, focusing on enhancing its functionality. Their work included adding a "migrate values" command for updating configuration files and making the "distro" parameter mandatory. The user also addressed issues related to Helm version compatibility and implemented checks for values file formats, ensuring the tool's robustness and forward compatibility. Furthermore, they made changes to prevent distro and backing store switches during upgrades.
clustershelmvclusterk8scheaper
johannesfrey/Ceme
Apr 2016 - Sep 2016
Contributions:112 commits, 19 pushes, 1 branch in 4 months
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