Software Engineer

El Segundo, CA

Radiant Industries is an El Segundo, CA-based startup developing Kaleidos, a portable, containerized nuclear microreactor. Portable nuclear power with rapid deploy capability can replace diesel generators used today to provide critical asset support for hospitals, datacenters, and military bases or to power microgrids at remote sites. Radiant’s unique practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-constructable microreactors leveraging existing, well-qualified materials. Radiant is on a fast track to demonstrate the first fueled operation of a new commercial nuclear reactor design, just four years from now. 

Radiant is seeking a highly motivated software engineer for an opportunity to work with mentorship and guidance from experienced software professionals in a fast-paced startup environment. The candidate will be responsible for various aspects of software development as priorities shift and expertise is gained.   

 Responsibilities & Duties 

  • Ownership of Software Design, examples: 

    • Reactor control, microgrid control, or fleet monitoringUI 

    • Nuclear Analysis Pipeline development 

    • Digital Twin support: Performance tracking for nuclear and thermal modeling 

    • Control Engine development - used for hardware integration, drivers for motors, encoders, flux detectors, temperature and pressure sensors 

  • Create production software to support data storage and automation of manufactured parts. 

  • Develop test software to control subsystem tests. 

  • Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. 


Required Qualifications & Skills 

  • Bachelor’s degree in computer science or similar field from an accredited institution . 

  • At least 1 year of software development experience:

    • C, C++, or Python development experience is preferred.  

    • Prior use of code repositories, unit testing, performance benchmarking, and software review / release processes.  

    • Familiarity with good documentation practices and implementation of style guidelines.  

  • Ability to relocate to Radiant’s office in El Segundo, CA (Greater Los Angeles Area). 

  • Ability to work or gain permission to work on export - controlled technologies based in the United States. 


Desired Qualifications & Skills 

  • Competency in distributed software development process . 

  • Self-motivated with strong organizational, written, and oral communication skills. 

  • 3+ years of professional experience designing hardware that was manufactured, deployed, and iteratively improved. 

  • Recent graduates may apply to this post too. 



Stock: Substantial incentive stock plan for all salaried employees 

Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. 

Vision: 100% coverage + 50% for dependents 

Dental: 100% coverage, orthodontia extra, 50% for dependents 

Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits. 

Vacation/Sick time 

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.