Senior Software Engineer (HPC DevOps)

Join Radiant, a company focused on revolutionizing clean energy. As a Senior Software Engineer (HPC DevOps), you will support developer productivity, compute infrastructure, and scientific computing workflows. You will build and maintain the on-site HPC infrastructure and scientific computing environments, serve as a resource for engineering teams, and help modernize legacy scientific computing systems. This role offers a competitive salary, equity, and a range of benefits, including medical, dental, and vision coverage, flexible PTO, and a beautiful headquarters in El Segundo, California.

• Support developer productivity, compute infrastructure, and scientific computing workflows by building and maintaining HPC infrastructure.
• Serve as a go-to resource for engineering teams navigating HPC and scientific computing questions, and grow into ownership of specific systems and tooling areas.
• Help modernize legacy scientific computing systems and tooling, migrating to current stacks to improve maintainability, performance, and developer experience.
• The ideal candidate is patient and organized, comfortable managing a steady volume of cross-disciplinary requests, and capable of digging into complex legacy stacks to find and fix root causes
• Ability to dig into complex, nested legacy stacks and communicate findings clearly to a broader technical audience
• 4+ years of professional experience in developer productivity, site reliability, DevOps, infrastructure, or platform engineering
• Bachelor's degree in Computer Science, Engineering, Physics, or a related technical field
• Strong proficiency in one or more languages: Python, Golang, Rust, C#, or C/C++
• Solid code review skills, including the ability to read stack traces and work through legacy scientific software environments
• Strong communication skills; organized and effective when fielding requests from engineering stakeholders
• Linux and sysadmin fluency, file systems, process management, and networking
• Hands-on experience with HPC environments, simulation workloads, or academic/research computing (SLURM, PBS, MPI, Lustre, EFS, AWS ParallelCluster, or similar)
• Comfortable picking up frontend work when needed, React or general JavaScript experience is a plus; an open mind toward full-stack contributions is more important than depth here
• Working experience with Kubernetes and Docker for orchestration and deployment
• Cloud infrastructure experience with Ansible, Terraform, or AWS in a cloud-native or hybrid environment
• Master's degree in Computer Science, Engineering, Physics, or a related technical field
• Must be willing to work extended hours and weekends as necessary to accomplish our mission
• Hands-on physical infrastructure experience: server hardware, rack configuration, data center ops, or high-throughput networking (InfiniBand, Slingshot, AWS EFA)
• Experience working cross-functionally with engineering teams across mechanical, electrical, materials, and nuclear disciplines