Careers at Radiant Industries

About Radiant 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. About the Role Radiant is seeking an Engineering Manager, Integration & Test , to lead the electrical engineering team responsible for test infrastructure and system integration for Kaleidos, Radiant's commercial microreactor unit targeted for deployment in 2028. You will manage a team of electrical engineers while owning cross-functional stakeholder relationships and driving execution from early architecture through hardware bring-up, testing, and commissioning. The ideal candidate brings deep electrical engineering expertise, proven people management experience, and a track record of delivering complex hardware programs on tight timelines. Responsibilities & Duties Lead and grow a team of electrical engineers, owning hiring, performance management, and technical development. Own electrical and software integration requirements spanning power distribution, signal conditioning, sensor mapping, actuator interfaces, and device simulation. Manage schedule, budget, and vendor relationships for electrical hardware and integration activities. Drive electrical validation strategy; establish test procedures, methodologies, and best practices across the team. Own cross-functional alignment with embedded, controls, software, and mechanical engineering teams. Oversee test infrastructure build-out and establish the test environment as a foundational asset ahead of the 2028 deployment target. Lead design reviews and communicate technical decisions to cross-functional stakeholders and leadership. Required Qualifications BS in Electrical Engineering or a related discipline. 8+ years of progressive electrical engineering experience, including hands-on hardware design, integration, and test. 2+ years of engineering management experience, including hiring and team development. Demonstrated ability to drive programs with significant scope and ambiguity under tight timelines. Experience with DAQ and test systems (e.g., NI PXI, dSpace, Speedgoat, or similar). Proficiency with LabVIEW, TestStand, and at least one scripting language (Python, C++, C#, or similar). Strong electrical and software debugging and root cause analysis skills. Desired Qualifications MS or PhD in Electrical Engineering or a related discipline. 4+ years of engineering management experience, including hiring and team development. Familiarity with real-time simulation systems and/or FPGA-based hardware. Experience with controls fundamentals and software testing processes. Background in high-reliability, safety-critical, or regulated industry environments (aerospace, defense, nuclear, medical, or automotive). 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. 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. 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.

About Radiant 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 to 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: BS or MS in Software Engineering, Controls Systems Engineering, or a related discipline. Graduating in December 2026 or Spring 2027. 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. 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. 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.

About Radiant 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. About the Role Radiant is seeking a Senior FPGA Verification Engineer to add to our Embedded Systems team. You will lead verification of FPGAs used in reactor safety, control, and instrumentation systems, covering safety-critical applications, sensor and actuator handling, and communication systems. This role requires close collaboration with RTL design engineers, hardware engineers, embedded software engineers, and test engineers in a cross-functional setting to ensure designs meet the rigorous demands of controlling and monitoring fission reactors. You will be a key contributor in validating the first commercial reactor design in over 50 years. Responsibilities and Duties: Lead verification efforts for FPGA designs using SystemVerilog and UVM/OVM frameworks, from test plan development through coverage closure. Develop and maintain automated verification testbenches for functional, regression, constrained-random, and edge-case coverage. Define and execute verification strategies for sensor processing, serial communication, and actuator handling logic. Collaborate directly with RTL designers and embedded software engineers to identify design intent, resolve bugs, and ensure complete functional coverage. Recommend new tools and practices to continuously improve the FPGA verification flow. Contribute to RTL design work as needed. Required Skills and Qualifications: Bachelor's degree in computer engineering, electrical engineering, or a related field. 7+ years of FPGA verification experience with significant depth in functional verification. Expert proficiency in SystemVerilog and UVM-based verification methodologies. Strong understanding of FPGA verification flows — simulation, coverage analysis, and regression management. Experience verifying multi-clock domain designs. Familiarity with serial communication protocols such as UART, SPI, and I2C. Familiarity with Ethernet as well as AXIS and APB buses. Desired Skills and Qualifications: Experience with the Microchip PolarFire SoC platform. Experience with JASPER or similar verification tool. Proficiency with Linux and TCL/bash shell scripting. Excellent documentation skills and demonstrated ability to work in multidisciplinary engineering environments. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo headquarters. 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. 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.