AI Infra SRE: Scale Kubernetes, Linux & 24/7 Ops

Radiant; Gloucester; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

25 days annual leave

Private medical insurance

Cycle to Work

Gympass access

Stock program

Job summary

Radiant is seeking a senior Site Reliability Engineer in the UK to design, deploy, and operate scalable AI-native infrastructure. You will own Kubernetes clusters, tune Linux and I/O, and drive automation across the platform.

You will champion ITSM practices, maintain Prometheus/Grafana monitoring, and participate in 24x7 on-call support. Mentoring and cross-training with Platform SRE and HPC teams are key parts of the role.

Qualifications

• 5+ years in globally scaled, 24/7 environments as an SRE or similar role.
• 3+ years running and optimising orchestration platforms with Kubernetes.
• Expert Linux administration with Ubuntu distributions.
• Strong networking (TCP/IP, DNS, DHCP, VLANs).
• Proficient in Bash and Python automation; ITSM familiarity.

Responsibilities

• Deploy and manage Kubernetes clusters at scale for AI workloads.
• Develop manifests and operators for deployment and networking services.
• Tune Linux kernel, I/O, storage to support orchestration layer workloads.
• Automate platform lifecycle; build tooling for incident resolution.
• Apply ITSM processes: Incident, Major Incident, Change Management.
• Maintain observability stack: Prometheus, Grafana, alerts integrations.
• Provide 24x7 on-call coverage and incident postmortems.
• Mentor junior engineers and align with Platform/SRE teams.

Skills

SRE in 24/7 environments

Kubernetes administration

Linux administration (Ubuntu)

Networking fundamentals

Scripting (Bash, Python)

Observability (Prometheus, Grafana)

Incident response & postmortems

Education

Bachelor or Master in Computer Science or related field

Tools

Kubernetes

Prometheus

Grafana

Ansible

Ubuntu Linux

Job description

Radiant is seeking a senior Site Reliability Engineer in the UK to design, deploy, and operate scalable AI-native infrastructure. You will own Kubernetes clusters, tune Linux and I/O, and drive automation across the platform.

You will champion ITSM practices, maintain Prometheus/Grafana monitoring, and participate in 24x7 on-call support. Mentoring and cross-training with Platform SRE and HPC teams are key parts of the role.