Senior DevOps Engineer

We UC runs on our own infrastructure, on our own hardware, in UK data centres. That's a deliberate choice: it's how we keep customer data where it belongs and how we keep a real-time communications platform feeling instant. We're looking for a senior engineer to add depth to the team that runs it. You'll work across virtualisation, storage, container orchestration and the automation that holds it all together. Production Kubernetes experience is the single biggest win here; Proxmox and Ceph knowledge close behind. The role is hybrid from our Southampton office - a few days a week with the team, the rest from home, with data centre visits when the work calls for it.

Key Responsibilities

• Operate and improve our Proxmox VE virtualisation estate across data centre sites.
• Own storage performance and integrity: architecture, replication, backups, and recovery procedures that are actually tested.
• Build and maintain infrastructure as code with Ansible and Terraform - the estate should be reproducible, not folklore.
• Run container orchestration day to day and help lead our path deeper into Kubernetes.
• Keep monitoring and alerting sharp, so problems are found by us and not by customers.
• Write things down: runbooks, diagrams and clear proposals for the changes worth making.
• Get hands-on in the data centre when the work calls for it.

• Five or more years in DevOps or infrastructure roles at modern companies - SaaS, telecoms or infrastructure-heavy environments ideally.
• Production Kubernetes experience - designing, running and debugging real workloads. This is the biggest win.
• Proxmox experience, especially Ceph and block storage - a close second.
• Strong infrastructure-as-code habits with Ansible, Terraform or similar.
• Linux administration at scale, bare metal and virtual.
• Comfortable in production-critical environments where uptime is non-negotiable - business communications can't go down.
• UK-based, within reach of Southampton for office days and data centre visits.

• Competitive salary and benefits package.
• Real infrastructure at real scale - your own hardware, not just someone else's cloud.
• Hybrid working from our Southampton office.
• Professional development and career growth opportunities.
• Collaborative and innovative work environment.

Please send your resume and a cover letter detailing your experience and why you're the perfect fit for this role to [email protected] with the subject line "Senior DevOps Engineer Application."