Open Source Software Engineer (mid/senior) - kcp (CNCF Sandbox Project) (f,m,d)

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    "datePosted": "2025-10-24",
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    "description": "<p><span style=\"font-weight: bold\">Location:</span> Remote (Time zone: CET +/- 4hrs) on-site/hybrid in Hamburg, Germany. We are a remote-first company.<br></p>\n<p><br></p>\n<p><span style=\"font-weight: bold\">Shape the Future of Developer Platforms</span></p>\n<p>The kcp project is redefining how organizations build multi-tenant platforms at scale. As a CNCF Sandbox project, kcp provides a horizontally scalable Kubernetes control plane that powers next-generation developer platforms from large EU initiatives like Apeirora, CNCF contributor portal, to Kubermatic's own Developer Platform. We're tackling one of modern enterprises' hardest problems: how to bring a single pane of glass, a single control panel to tackle the complexity of the modern IT landscape inside companies. It is not only a technology, but a foundation and framework to work with heterogeneous technologies that we manage at scale.</p>\n<p><br></p>\n<p><span style=\"font-weight: bold\">What You'll Be Doing</span></p>\n<ul>\n<li>Develop and maintain upstream kcp projects under the CNCF umbrella, contributing to a project envisioned to support one million workspaces across 10,000 shards.</li>\n<li>Design and implement Kubernetes controllers and operators that power multi-tenant platforms at scale.</li>\n<li>Write secure, well-tested, and performant code that meets production standards for distributed systems.</li>\n<li>Implement CI/CD automation and end-to-end testing workflows that ensure reliability at scale.</li>\n<li>Engage with the CNCF community and contribute to roadmap discussions for kcp and related projects.</li>\n<li>Represent Kubermatic's values in public communications and community contributions.</li>\n<li>Participate in code reviews, maintaining high standards for a distributed systems environment.</li>\n<li>Contribute to the Kubermatic Developer Platform.</li>\n</ul>\n<p><br></p>\n<p><span style=\"font-weight: bold\">What We're Looking For</span></p>\n<ul>\n<li>Real-world experience building Kubernetes controllers and operators, with an in-depth understanding of Kubernetes API machinery and core controllers.</li>\n<li>Proven ability to write clean, maintainable, and efficient code for cloud infrastructure.</li>\n<li>Comfort with container technologies, cloud-native architectures, and the challenges of building systems at scale.</li>\n<li>Ability to articulate complex technical and architectural problems and propose iterative solutions.</li>\n<li>A pragmatic and collaborative mindset with a focus on results and shipping quality software (we often pair on complex features).</li>\n<li>Excellent English communication skills for documentation, code reviews, and community engagement.</li>\n<li>Track record of contributions to open source projects in the cloud-native space is a strong plus.</li>\n<li>Experience with CNCF projects or Kubernetes ecosystem tools is highly desirable.<br></li>\n</ul>\n<p><br></p>\n<p><span style=\"font-weight: bold\">What We Offer</span></p>\n<ul>\n<li>Competitive salary</li>\n<li>B2B contracts available, with annual paid time off plus local bank holidays</li>\n<li>Remote-first: work from anywhere in Europe (CET ±4h)</li>\n<li>A dynamic yet laid-back team environment</li>\n<li>Regular hackathons and company offsite meetings</li>\n<li>Best-in-class development tools of your choice</li>\n<li>Full support for training, certifications (CKA, Linux Foundation, etc.), and conference attendance</li>\n<li>As a CNCF member, you get access to certified courses and first-class information about the Kubernetes ecosystem</li>\n<li>Speaker support: we'll back you if you want to present at events</li>\n<li>Active community involvement: enjoy our meetups and our flagship community conference, ContainerDays</li>\n</ul>\n<p><br></p>\n<p><span style=\"font-weight: bold\">About Kubermatic</span></p>\n<p>Kubermatic has a long-standing commitment to open source and the cloud-native community. We're building platforms that enable organizations to deliver software faster and more reliably. Our work on kcp isn't just about technology; it's about making powerful infrastructure accessible and simple to use at any scale.</p>\n<p><br></p>\n<p><span style=\"font-weight: bold\">Process</span></p>\n<p>1. A 30-minute call with our People Manager<br>2. A 90-minute technical interview with two members of the team<br>3. A 30-minute meeting with Engineering Leadership<br>4. A 45-minute meeting with Sebastian Scheele (Technical Co-founder and CEO)</p>",
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