Overview:
System One is seeking an entry-level Nuclear Methods Software Engineer to support development on the ARMI framework—an advanced Python codebase used for nuclear reactor design and analysis across multiple next-generation reactor programs. This role involves daily Python development, code reviews, software testing, documentation, and contributions to mission-critical nuclear analysis tools.
• Design and develop Python software for the ARMI framework and related tools
• Participate in code reviews (reviewing and being reviewed)
• Write and audit tests within large Python codebases
• Develop and maintain documentation for nuclear methods software
• Support CI/CD activities for reactor design and analysis software
• Apply and promote software engineering best practices
• Collaborate with a diverse team of engineers and contribute to continuous improvement
• B.S. in Nuclear Engineering or B.S. in a STEM field with 3+ years’ experience in nuclear methods
• Proficiency in Python programming
• Strong communication skills
• High integrity, openness, respect, and a team-oriented mindset
• Interest in software testing, quality, and documentation
• Experience working in a nuclear quality environment (NQA-1 or ISO 9001)
• Desire to build a career at the intersection of nuclear engineering and software engineering
• Experience with unit testing in Python
• Experience writing/maintaining software documentation
• Familiarity with software quality best practices
• Experience with CI/CD concepts and tools
• Understanding of fast reactors or advanced reactor systems
• Experience with digital twin modeling or real-time data pipelines
• Graduate degree in Nuclear Engineering
• 3+ years professional programming experience
• Sitting/standing for extended periods; bending/stooping; fine motor control
• Ability to safely lift up to 25 lbs
• Prolonged repetitive work
• Visual and auditory concentration required
• Standard office/computer work environment (>8 hrs/day)
• Light travel: 0–5%
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