Infrastructure Site Reliability Engineer

About the Company

Radiant is redefining how AI infrastructure is built. We design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale, powering GPU-native workloads and high-performance AI systems.

Responsibilities

• 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
• Apply ITSM frameworks including Incident, Major Incident, and Change Management
• Maintain and enhance observability stack using Prometheus and Grafana
• Operate and support services in 24x7 production environments including on-call rotation
• Mentor junior engineers and contribute to incident postmortem analyses

Requirements

• 5+ years of experience in globally scaled, performance-intensive environments
• Expert-level Linux administration (specifically Ubuntu)
• Proficiency in system tuning and hardware-level performance tweaks
• Familiarity with Out of Band management tools (IPMI, Redfish, PXE)
• Strong networking fundamentals (TCP/IP, DNS, DHCP, VLANs, routing, switching)
• Strong experience with infrastructure scripting and automation (Bash, Python, Ansible)
• Deep understanding of observability tools (Prometheus, Grafana)
• Hands-on experience with orchestration platforms (Kubernetes, MAAS, Tinkerbell)
• Strong grasp of ITSM and service operation best practices

Preferred Qualifications

• Knowledge of HPC workloads and GPU-based infrastructure
• Experience with InfiniBand networks and HPC performance tuning
• Bachelor or Masters degree in Computer Science or Engineering
• LPIC Certifications
• ITIL Foundation level qualification