Internship - Software Engineering

Sorry, this job was removed at 12:15 a.m. (CST) on Thursday, May 08, 2025
El Segundo, CA
In-Office
Greentech • Hardware • Energy
Radiant's goal is to bring one of the world's first factory-constructed microreactors to market.
The Role

Radiant is an El-Segundo, CA-based clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Radiant's goal is to bring one of the world's first factory-constructed microreactors to market. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios. 

Software Engineering Internship

Radiant is seeking a motivated Software Engineering Intern with a strong computer science foundation to join our team. As an intern, you will work alongside mechanical, electrical, and nuclear engineers to assist in developing software tools that support simulation and analysis for reactor design, development, and safety analysis. This is an excellent opportunity to gain hands-on software development experience in a highly interdisciplinary environment.
Responsibilities and Duties:

  • Assist in creating tooling to support a variety of simulation software packages.
  • Contribute to internal software products that support simulation and analysis of simulation results.

Required Qualifications and Skills:

  • Currently pursuing a degree in computer science, physics, or a related technical discipline.
  • Familiarity with Python, C++, C#, or similar object-oriented programming languages.
  • Basic knowledge of software development practices and version control tools such as Git.

Desired Qualifications and Skills:

  • Strong self-motivation and the ability to collaborate effectively in a team environment.
  • Interest in contributing to simulation tools or working on software testing.
  • Familiarity with distributed software development and common design patterns is a plus.
  • A passion for physics, hardware, or electrical engineering is highly encouraged.

Additional Information:

  • This internship will require working onsite at our El Segundo HQ.
  • You may be asked to work extended hours or weekends occasionally to support project goals.

Employee Benefits for Eligible Employees:

  • Stock: Substantial incentive stock plan for all full time, salaried employees.
  • Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
  • One Medical: Sponsored memberships for employees and their dependents. 
  • Vision: 100% top tier plan coverage + 50% for dependents.
  • Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
  • Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits.
  • Free snacks and drinks onsite. 
  • Flexible PTO policy.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.

Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.

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The Company
HQ: El Segundo, CA
130 Employees
Year Founded: 2019

What We Do

Radiant is a clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.

Why Work With Us

Our world-class team has prior experience in complex hardware development from SpaceX, McMaster, The Boring Company, and renowned national laboratories that define our mentality to radically improve our microreactors. We care deeply about our mission to reduce carbon emissions, and have fun while doing so from trivia nights to ski retreats.

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