Scroll
Software Engineering Manager
Radiant
Software Engineering
El Segundo, CA, USA
Posted on Sep 30, 2025
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 failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. 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 utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028.
Software Engineering Manager
Radiant is seeking a Software Engineering Manager to build a platforms function and team. In this role, you will build and lead a team responsible for internal developer tooling, CI/CD pipelines, data processing infrastructure, and analysis tools. Notably, analysis post-processing and visualization falls within the scope of the platforms team, and you will have an opportunity to influence Radiant’s data strategy. You will work in a highly interdisciplinary environment to build products that serve modeling and analysis needs across the organization, and pull milestones forward to unlock commercialization of the first mass-produced nuclear reactor.
Responsibilities and Duties:
- Lead, grow, and mentor a high-performing team of engineers focused on internal tools, development platforms, and infrastructure.
- Own the roadmap for internal developer tooling: CI/CD pipelines, version control systems, artifact management, build systems, developer environments, testing frameworks, and release processes.
- Partner with engineering leaders across software, electrical, mechanical, and nuclear disciplines to identify needs and deliver scalable, reliable solutions, including small internal products.
Required Qualifications and Skills:
- Bachelor’s degree in computer science or engineering
- 5+ years of professional experience in software engineering, infrastructure, or platform roles, with 2+ additional years in a technical leadership or engineering management position.
- Strong Python, C++, C#, or similar object-oriented programming language experience
- Deep understanding of build systems and data pipelines
- Familiarity with containerization (Docker), orchestration (Kubernetes), and infrastructure-as-code.
- Ability to work from Radiant’s office in El Segundo, CA (greater Los Angeles) full-time
Desired Qualifications and Skills:
- Experience in a highly regulated industry (aerospace, automotive, nuclear)
- Prior experience with simulation or computational modeling
- Experience testing software and hardware systems
- Experience with distributed software development and familiarity with common design patterns
- Interest in physics, hardware and electrical engineering
Additional Requirements
- Must be willing to work extended hours and weekends as necessary to accomplish our mission.
- Must work 100% onsite at El Segundo HQ.
Total Compensation and Benefits
Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications.
Benefits and Perks for Eligible Employees:
- 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.
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.