Senior Software Engineer, Radiant Nuclear

• 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
• Bachelor's degree in Computer Science, Engineering, Physics, or a related technical field
• 4+ years of professional experience in developer productivity, site reliability, DevOps, infrastructure, or platform engineering
• Linux and sysadmin fluency, file systems, process management, and networking
• 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
• Ability to dig into complex, nested legacy stacks and communicate findings clearly to a broader technical audience
• Must be willing to work extended hours and weekends as necessary to accomplish our mission

Desirable

• Radiant is seeking a driven Senior Software Engineer to support developer productivity, compute infrastructure, and scientific computing workflows
• You'll help build and maintain the on-site HPC infrastructure and scientific computing environments that hard-science users depend on daily, working closely with the software team to build scalable, resilient tooling that lets engineers focus on their science, not their infrastructure
• You'll 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
• The infrastructure and tooling you build will help design, run, and mass-produce the first high-temperature gas-cooled portable microreactor ever to be commercialized
• Support workflows, tooling, and performance for scientific computing, including Ansys, STAR-CCM+, and Abaqus, covering licensing, environment setup, job orchestration, and results infrastructure
• Serve as a resource for engineering teams, fielding HPC questions, software issues, and infrastructure needs from nuclear, thermal, materials, mechanical, and electrical engineers, and translating them into actionable work
• Triage inbound infrastructure requests, HPC/MPI/Linux debugging, and job failure analysis, prioritizing effectively and communicating clearly across stakeholders
• Help modernize legacy scientific computing systems and tooling, migrating to current stacks to improve maintainability, performance, and developer experience
• Partner with DevOps engineers to maintain systems across AWS and on-premises Linux environments, supporting high availability, security, and performance for mission-critical workloads
• Contribute to tools supporting build systems, testing frameworks, deployment automation, and developer environments