full time (permanent contract)

Full remote, hybrid or on site (Grenoble, France)

The XCP-ng team uses, signs and bundles paravirtualized (PV) drivers, among tools and an agent to run in Windows virtual machines. Those 3 programs are needed to get decent performance for Windows (disk and network), and also provide a communication channel with the management API, sending important data. Those programs are bundled in a installer, installed by the user. Vates is looking for a developer with Windows knowledge, on the system and drivers part of this operating system family. As part of the XCP-ng team, you'll have the chance to generate a significant impact on our systems running on thousands of Windows machines all around the world: increasing the overall performances with the hypervisor team, improving the installer to update or remove previous tools cleanly, and even think on extending the agent capabilities for some uses cases.

• You'll work in a team with a "full stack" knowledge (from the Xen Hypervisor to the management central console in NodeJS, "Xen Orchestra", consuming this API.
• You'll implement new features, analyse deliver increased performances for Windows VMs
• You'll also participate on the overall tools architecture and optimizations
• You will become our expert on the Windows aspects, while participating to broad discussions on the whole virtualization platform

• BS in Computer Science or related discipline, or equivalent work experience
• Experience on writing installers for Windows
• Experience in Windows system and drivers
• Good capacity to understand the requirements from both lower and higher layers (between Xen Hypervisor and Xen Orchestra)
• Team player

Vates is a French software company specializing in Open Source and virtualization with a deep commitment to open, collaborative development. Our main projects, Xen Orchestra and XCP-ng, span the full virtualization stack—from the hypervisor (Xen) and virtualization platform (XCP-ng) to management and VM backups (Xen Orchestra). Our team works across multiple countries, fully embracing remote work with transparent workflows and accessible communication channels. At Vates, we are driven by a strong, people-first culture that values benevolence, inclusivity, and a horizontal structure. Every member is empowered to contribute ideas, make decisions, and grow with the company. Our open-source model is core to everything we do, not just in our code, which is available on GitHub and GitLab, but in our collaborative approach with the community. We believe in "upstream first," dedicating our expertise and resources to support and advance foundational projects like Xen, and helping contributors of all levels join us on this journey.