Summer 2026 Internship - Software Engineering

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.

Please note: we plan to begin interviewing for Summer 2026 internships in November/December.

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.

Benefits and Perks

• Stock: Substantial incentive stock plan for all full-time 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/HSA are offered as employee contributed benefits.

• 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.

• Daily catered lunch. Free snacks and drinks.

• Flexible PTO policy. Remote workday allocation.

• Company and team-bonding events, happy hours and in-person camaraderie.

• Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits

Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today's advanced reactor builders don't wait for job postings. They join the winning team. If that's you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.

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.