Philip Langer is a CEO and Principal Software Architect with 14+ years building web/cloud-based domain-specific modeling and engineering tools from Vienna, Austria. He leads EclipseSource and several Eclipse projects (GLSP, EMF.cloud, CDT.cloud) and is an active committer on staples like Theia, Sprotty and Papyrus, translating research-grade model-based engineering into production-ready tooling. His background as a postdoc in model-based software development informs practical expertise in collaborative modeling, model diff/merge with Git, simulation and model-based testing. Notably, he contributes full-stack improvements to the widely used Eclipse Theia IDE—enhancing developer UX and integrating testing frameworks such as Playwright. He combines academic rigor (PhD in Computer Science) with entrepreneurial leadership, advising students and maintaining ongoing research collaborations while steering product-focused open-source projects.
14 years of coding experience
8 years of employment as a software developer
Dipl.-Ing. (MSc), Business Informatics, Dipl.-Ing. (MSc), Business Informatics at Vienna University of Technology
Eclipse Theia is a cloud & desktop IDE framework implemented in TypeScript.
Role in this project:
Full-stack Developer
Contributions:261 reviews, 20 commits, 116 PRs in 1 year 4 months
Contributions summary:Philip primarily contributed to the Theia IDE framework by implementing features and fixing bugs related to the user interface and plugin integrations. They addressed an import issue related to Electron, added support for the Theia Playwright framework including UI preference testing, and added support for indeterminate progress notifications, which involved changes to the notification component and core message service. Their contributions demonstrate a focus on improving the developer experience and integrating new testing tools.
Contributions:45 reviews, 49 commits, 90 PRs in 3 years 3 months
glsp
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Philip Langer - CEO Principal Software Architect at EclipseSource