Senior Systems Engineer- Network Infrastructure

Nscale is building next-generation AI infrastructure from the ground up, aiming to deliver reliable and scalable network clusters for large-scale AI training and inference. The Senior Systems Engineer will lead the deployment of network clusters, ensuring they are validated and production-ready, while also contributing to automation and process improvement.

Responsibilities:

• Execute end-to-end bringup of network nodes and racks from installation to production readiness
• Validate BIOS/BMC/firmware configurations and network health
• Perform rack-level integration including power, cabling, and airflow validation
• Bring up and validate high-speed network fabrics (InfiniBand, RoCE, 100–400G Ethernet)
• Configure and validate leaf/spine network connectivity
• Run cluster-wide burn-in and stress testing
• Validate node-to-node performance (NCCL, RDMA, GPUDirect)
• Troubleshoot hardware, firmware, and fabric-level issues
• Contribute to automation for provisioning and cluster validation
• Improve deployment playbooks and documentation
• Identify reliability issues early and drive corrective actions
• Help turn ad hoc deployments into repeatable systems
• Work closely with networking, systems software, and data center teams
• Coordinate with hardware vendors to resolve bringup issues
• Support rapid capacity expansion as we scale

Requirements:

• 5–8+ years in infrastructure engineering, hardware deployment, or data center operations
• Hands-on experience deploying network servers (HGX/DGX or similar platforms)
• Experience with high-speed networking (InfiniBand, RoCE, Ethernet fabrics)
• Strong Linux systems knowledge
• Experience troubleshooting distributed systems performance issues
• Comfortable working onsite in data center environments as needed
• Experience in AI/ML infrastructure or HPC environments
• Familiarity with NCCL, CUDA, RDMA
• Automation experience (Python, Ansible, Terraform, Bash)
• Experience in high-density power and cooling environments