Senior Software Engineer

Oklo•Santa Clara, CA

2d•Remote

About The Position

Join us in pioneering the next generation of nuclear reactors! You'll leverage your software skills alongside nuclear engineers to model, simulate, design, and deploy advanced fission power technology. You will work at the forefront of the nuclear industry, developing novel techniques to reach new levels of safety, efficiency, and resiliency. Come be a part of powering the future with advanced fission power plants to provide clean, reliable, affordable energy. Position Description Oklo is a fast-moving startup where you will be responsible for tackling a wide range of challenges in reactor design and analysis. A nuclear background is not required, but a healthy curiosity and eagerness to learn are essential in this role. Oklo requires remote employees to travel to headquarters (Santa Clara, CA) twice a quarter annually, based on business or team needs, including attendance at team meetings, off-sites, and other company events or gatherings. About Oklo Inc.: Oklo Inc. is developing fast fission power plants to deliver clean, reliable, and affordable energy at scale; establishing a domestic supply chain for critical radioisotopes; and advancing nuclear fuel recycling to convert nuclear waste into clean energy. Oklo was the first to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant, was awarded fuel material from Idaho National Laboratory, and submitted the first custom combined license application for an advanced reactor to the U.S. Nuclear Regulatory Commission. Oklo is also developing advanced fuel recycling technologies in collaboration with the U.S. Department of Energy and U.S. National Laboratories. #CHOP: Oklo's Values Collaboration: We go further, together. We bring diverse perspectives, listen actively, and build trust through transparency and respect. We work across disciplines, sharing ownership to turn complex challenges into shared successes. Humility: We are team players who act for the good of the company and for the world. We are focused on our mission, not personal recognition. Ownership: We take pride in what we do and how we do it. We are proactive in finding solutions and see tasks through to completion. We are committed to delivering on our promises to provide clean, reliable, and affordable energy. Pathfinding: We chart new ground where no path exists by approaching challenges with curiosity, courage, and creativity while navigating ambiguity. Recruitment Fraud Disclaimer Oklo is aware of recent recruitment fraud attempts targeting job seekers. Please be cautious of anyone claiming to represent Oklo who does not contact you from an official Oklo email address. All legitimate communications from our recruiting team— including application updates, interview requests, and job offers — will come exclusively from an Oklo email. Oklo will never ask for sensitive personal information, payments, or account credentials during the hiring process. If you receive suspicious outreach or have concerns about the authenticity of any communication claiming to be from Oklo, please contact us through the official channels listed on our website.

Requirements

Bachelor's degree in computer science, computer engineering, or equivalent work experience
8+ years of professional software engineering experience
Fluency in Python
Strong proficiency with Git
Experience designing, implementing, and maintaining CI/CD pipelines
Demonstrated ability to own projects end-to-end: requirements gathering, architecture, implementation, testing, deployment, and iteration
Strong communication skills and experience collaborating with cross-functional partners (e.g., scientists, analysts, or domain experts)
Curiosity and passion for nuclear power, closing the nuclear fuel cycle, and sustainable energy generation

Nice To Haves

Proficiency in Rust
Proficiency in Typescript/Javascript (especially Svelte)
Experience growing and mentoring small software teams or organizations
Experience designing and operating large data collection or analysis pipelines
Experience with optimization, statistics, and design of experiments
Knowledge of GitLab CI/CD
Prior work developing and implementing software quality assurance programs and testing strategies, especially in quality- or safety-focused industries
Experience working in regulated environments (e.g., energy, aerospace, medical, automotive)

Responsibilities

Lead the design of systems for storing and retrieving reactor data and physics results at scale
Architect and own CI/CD pipelines for multiphysics analyses, ensuring reliability, observability, and reproducibility of complex simulations
Develop tools and platforms that enable reactor engineers to visualize, compare, and evaluate reactor designs
Develop physics kernels to solve unanswered problems, or to improve performance of existing models
Develop reactor optimization schemes and statistical experiments to inform design changes
Mentor other engineers, set technical direction, and contribute to building a strong engineering culture