Radiant is redefining how AI infrastructure is built.
We design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale. Our infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems designed for the most demanding environments.
We are not building a generic cloud. We are building purpose-built AI infrastructure - from powered land, to compute, to software .
As we scale our platform and expand our engineering organisation, we are looking for leaders who can build strong teams, uphold high standards, and deliver reliably at pace.
Job Summary:
We’re looking for an experienced Infrastructure Site Reliability Engineer to run and evolve our infrastructure stack. You’ll contribute across bare-metal, virtualization, and orchestration layers,
keeping things stable and secure 24/7 x 365 — all while mentoring teammates, improving process and automation as well as helping translate deep technical concepts for a wide range of collaborators and customers.
What You’ll Do
- Deploy and operate resilient, scalable infrastructure supporting AI/HPC workloads
- Optimize Linux system configuration, BIOS/firmware, kernel, and disk subsystem for performance
- Configure, monitor and manage bare-metal infrastructure using IPMI, Redfish, etc
- Build and maintain automation scripts and infrastructure as code to support platform lifecycle, as well as simplifying troubleshooting for Incident resolution and provision of tooling for our support organisation
- Apply ITSM frameworks: Incident, Major Incident, Change Management, and service improvement.
- Maintain and enhance ’s observability stack: Prometheus, Grafana, and custom monitoring integrations
- Operate and support services in 24x7 production environments, including on-call rotation
- Contribute to Incident postmortem analyses, root cause analysis, document learnings, and automate remediations
- Mentor junior engineers and act as an Operational
requirements
consultant to other departments
- Communicate technical decisions clearly to non-technical stakeholders and customers
- Uphold a culture of: do, document, automate
- Willingness to cross train with Platform Engineering/Platform SRE to fully support both our infrastructure and platform stacks.
- Willingness to cross train with HPC Engineering, supported by NVIDIA to enhance our
- HPC supportability offering
What you bring
- 5+ Years Proven experience in globally scaled, performance-intensive environments operating to a 24/7 support model
- Expert-level Linux administration, especially Ubuntu distributions
- Proficiency in system tuning, disk I/O optimization, and hardware-level performance tweaks