XCP-ng XAPI Developer

Vates is a French software company specializing in Open Source and virtualization, with a strong commitment to open and collaborative development. Our main projects, Xen Orchestra and XCP-ng, cover the entire virtualization stack — from the hypervisor (Xen) and the virtualization platform (XCP-ng) to virtual machine management and backup (Xen Orchestra). Our company operates in an international environment, working fully remotely, fluent English required.

Join a passionate engineering team where open-source principles, technical excellence, and collaboration drive innovation. As a XAPI Developer at VATES, you will contribute directly to the evolution of XCP-ng, a leading open-source virtualization platform.

Your Responsibilities** :

• Design and implement new features in XAPI
• Define and drive the technical roadmap for XAPI
• Optimize the performance and reliability of XAPI
• Analyze and resolve technical issues identified in XAPI
• Provide ongoing support and maintenance for XAPI and XCP-ng
• Participate in XAPI as an open-source project: review contributions, maintain the CI, take care of LTS branches
• Write technical and functional documentation
• Write automated tests
• Collaborate with cross-functional teams, stakeholders, and external projects

Required Skills** :

• Experience in OCaml or with another functional programming language
• Proficiency in Git
• Experience in Linux, distributed programming or systems programming

**Nice to Have**

• Experience with testing environments (Jenkins/pytest)
• Experience in Open-Source projects
• Knowledge of virtualization

**Soft Skills**

• Strong analytical and problem-solving skills
• Excellent communication and teamwork abilities
• Attention to detail and commitment to quality
• Proactive mindset with a continuous improvement approach
• Curiosity and willingness to learn new technologies
• Adaptability in a fast-evolving technical environment
• Fluent in English

At VATES, you will find a flexible work environment, a supportive and approachable team, and a role that makes a real impact on a daily basis.

Location** :

Our offices are based in Grenoble or Paris, but we operate on a fully remote model to provide greater flexibility and daily work comfort.

You are free to work 100% remotely or come on-site occasionally, depending on your preferences.

Benefits**:

• Health insurance coverage funded at 50% by the company
• Benefits provided by the Works Council (employee discounts, cinema tickets, etc.)
• Employee savings plan (PEE)
• Profit-sharing schemeAnnual bonus
• 100% remote work

As part of our diversity and inclusion policy, this position is open to all candidates, regardless of gender.

Requirements

This position is ideal for a software engineer who enjoys working close to the core of a virtualization platform and tackling challenging technical problems.

We Are Looking For Someone With

• Bachelor’s degree to a Master’s degree in Computer Science, software engineering, software development, or information systems
• 5 years of experience on development project in langage OCAML or several years of experience without degree.
• A professional experience in development within an open source environment is appreciated.
• Fluent English.