Salary
£55,000 – 75,000 per year
Requirements
- Five or more years in DevOps or infrastructure roles, ideally in SaaS, telecoms, or other infrastructure-heavy environments
- Production Kubernetes experience designing, running, and debugging real workloads
- Strong Proxmox experience, especially with Ceph and block storage
- Solid infrastructure-as-code experience with Ansible, Terraform, or similar tools
- Linux administration experience at scale across bare metal and virtual environments
- Experience operating production‑critical environments where uptime is non‑negotiable
- Strong documentation habits in production environments
- UK‑based and within reach of Southampton for office days and data centre visits
- Prior experience in a telecoms, VoIP, or UC service provider environment is desirable
- Understanding of real‑time media workloads such as SIP and RTP is desirable
- Database operations experience with PostgreSQL or similar in production is desirable
- Networking fundamentals sufficient to work effectively alongside a carrier‑grade network team is desirable
- CI/CD pipeline design and developer platform experience is desirable
Responsibilities
- Operate, maintain, and improve our Proxmox VE virtualisation estate across all data centre sites
- Own capacity planning, host lifecycle, and hypervisor upgrades with minimal service impact
- Ensure the compute layer meets the availability demands of real‑time communications workloads
- Own storage architecture, performance, and integrity across the estate, including Ceph and block storage
- Own backup and recovery, including replication, retention, and regularly tested restore procedures
- Plan and execute storage growth ahead of demand from both platforms
- Run container orchestration in production day to day
- Lead our continued move deeper into Kubernetes, including cluster design, workload migration, and operational standards
- Support development teams with reliable build, deployment, and runtime environments
- Build and maintain infrastructure as code with Ansible and Terraform
- Automate routine operations, patching, and provisioning across both platforms
- Drive configuration consistency across sites and environments
- Own monitoring and alerting for the platform layer, keeping signal high and noise low
- Act as senior escalation for platform‑level incidents, including out‑of‑hours escalation on a planned basis
- Contribute to post‑incident reviews with clear root cause analysis and corrective actions
- Participate in disaster recovery and failover testing across the estate
- Maintain accurate runbooks, diagrams, and SOPs for the platform layer
- Put forward architecture proposals and business cases to the Infrastructure Manager for review and approval
- Collaborate with network, service, and development teams to align platform work with product needs
- Get hands‑on in the data centre when the work calls for it
Technologies
- Ansible
- CI/CD
- Cloud
- Ceph
- DevOps
- Hardware
- Support
- Kubernetes
- Linux
- Network
- PostgreSQL
- Terraform
More
We are Circle Cloud Communications Ltd, a telecommunications provider operating carrier‑grade, on‑prem infrastructure across four interconnected UK data centre sites. We maintain our own IP space via RIPE, run our own ASN, and deliver business‑critical unified communications and telephony services. We are also building Olatti, our next‑generation business phone system, on the same shared estate of our own hardware. This is a hands‑on senior DevOps role with real ownership across virtualisation, storage, Kubernetes, automation, monitoring, and incident response. We offer a small, capable team environment, a hybrid working pattern based in Southampton, planned out‑of‑hours support, 21 days annual leave, a birthday day off, bank holidays, and benefits including company pension, private medical insurance, on‑site parking, cycle to work scheme, company events, and work from home as part of the agreed hybrid pattern.
last updated 27 week of 2026
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