Summer 2027 Internship - Software Engineer

Radiant; El Segundo (CA); On-site; USD 34,000 - 48,000; Full time

Job summary

Radiant in El Segundo, CA is offering a Summer 2027 Software Engineer Internship. You will work onsite at Radiant HQ and contribute to tooling for simulation software and analysis of results.

This role seeks students pursuing a BS or MS in software-related fields with experience or familiarity in Python, C++, or C#. Strong collaboration skills and a passion for physics or hardware are a plus, with the internship emphasizing hands-on development and team-based projects in a fast-paced startup

Qualifications

• Pursuing BS or MS in Software Engineering, Controls Systems Engineering, or a related 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.

Responsibilities

• 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.

Skills

Python

C++

C#

Object-oriented programming

Git

Education

Pursuing BS or MS in Software Engineering, Controls Systems Engineering, or related discipline

Tools

Git

Job description

Summer 2027 Internship - Software Engineer

Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.

Radiant is seeking a highly motivated Software Engineer Internto join the team.
Responsibilities:

• 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.

Qualifications:

• Pursuing BS or MS in Software Engineering, Controls Systems Engineering, or a related 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:

• 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 Requirements:

• This internship is based 100% onsite at Radiant’s HQ in El Segundo, CA.

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.

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.