Sid Sijbrandij is a veteran founder and technology leader with 17+ years building developer platforms, best known as co‑founder and long-time CEO of GitLab, the AI-powered DevSecOps single application used by millions. He combines hands-on Ruby/Rails and DevOps experience—evident from deep contributions to GitLab’s CE and Omnibus repos—with strategic vision for open-core business models through Open Core Ventures. Sid moves fluidly between product engineering, company-building and philanthropy, leading initiatives at the Sijbrandij Foundation and the GitLab Foundation to rethink healthcare, energy and education. An early self-taught programmer who once built recreational submarines, he brings unconventional curiosity and practical engineering chops to his current roles as Executive Chair of GitLab and founder of AI orchestration startup Kilo Code. Recognized by Forbes for championing remote work, he also mentors startups via Y Combinator networks and invests in founders who commercialize open-source traction.
17 years of coding experience
9 years of employment as a software developer
Master of Science, Management Science, Master of Science, Management Science at University of Twente
Not a formal education, best startup incubator in the world., Not a formal education, best startup incubator in the world. at Y Combinator
GitLab CE Mirror | Please open new issues in our issue tracker on GitLab.com
Role in this project:
Full-stack Developer
Contributions:968 commits, 8 PRs, 7 pushes in 7 years
Contributions summary:Sid contributed to various aspects of the GitLab CE repository, including UI components, backend logic, and infrastructure. They implemented features related to release management and documentation. The commits show a focus on Rails framework and Ruby, as well as improvements to health checks and documentation, indicating a broad understanding of the project's codebase.
GitLab Omnibus Mirror | Please open new issues in our issue tracker on GitLab.com
Role in this project:
DevOps Engineer
Contributions:81 commits, 2 comments in 7 years 2 months
Contributions summary:Sid primarily focused on integrating Apache License headers across various configuration and code files. They also updated and added configuration files for the runit service, ensuring proper process supervision. Furthermore, they contributed to the modification of build scripts and software configurations.
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