Junior Software Engineer

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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 resilience. Come be a part of powering the future with advanced fission power plants to provide clean, reliable, affordable energy.

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.

• Transform and optimize the storage of reactor data and physics results
• Design and configure CI/CD pipelines to perform multiphysics analyses
• Build tools for reactor engineers to visualize, compare, and evaluate reactor designs and their physics
• Integrate simulation tools into our analyses pipelines
• Implement physics kernels to solve unanswered problems, or to improve performance of existing models
• Develop reactor optimization schemes and statistical experiments to inform design changes
• Identify and improve process‑related inefficiencies in reactor design that can be addressed with software

• Bachelor’s degree in computer science, computer engineering, or equivalent work experience
• 0–2 years of professional software engineering experience (internships, co‑ops, or significant projects are a plus)
• Fluency in Python
• Proficiency with Git
• Curiosity and passion for nuclear power, closing the nuclear fuel cycle, and sustainable energy generation

• Experience with CI/CD, preferably Git Lab
• Experience with Rust
• Experience with Typescript/Java script (especially Svelte)
• Experience with optimization, statistics, or design of experiments

A startup person:
You aren't driven by titles or hierarchy, and prefer efficiency to excess process. You don't need or expect to have a lot of guidance but you enjoy working in a fast‑paced team. If you prefer the culture and feel of a large organization, that is great, but you likely won't enjoy working with us!

Motivated:
You are self‑motivated. You bring an enthusiasm to the team, and imbue a sense of passion that goes beyond clocking in and clocking out.

A team‑player:
Oklo genuinely is a team. We aren't about taking credit for ourselves, and we aren't about pushing blame to others. We do incredible things because we work as a team.

An excellent communicator:
We need a person who is not only technically competent but also a clear and upbeat communicator.

Creative:
Being creative means that when things fall outside clear scopes or processes or problems arise without clear solutions, you are able to identify it as well as invent ways to solve a problem or fill a need without micromanagement.

Detail‑oriented:
This focus is a big part of excellence, consistency, and quality. Excellent grammar and spelling matter for both good communication as well as the image of the company that we put forward.

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.

$80,000–$115,000

Oklo offers flexible time off, equity, competitive pay, 401k, health insurance, FSA, flexible work hours, and other benefits.

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…