Principal FPGA Engineer

Radiant is an El Segundo CA-based startup building the worlds first mass-produced portable nuclear microreactors. The companys 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. Radiants 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.

• Architect and own complex sensor processing and control systems from concept through production deployment.
• Establish VHDL design standards coding guidelines and review team implementations.
• Lead FPGA/SoC platform selection evaluation and integration strategies.
• Develop comprehensive verification frameworks and automated test infrastructure for continuous validation.
• Drive the technical roadmap in collaboration with the embedded software leadership team.
• Mentor engineers and establish best practices across disciplines while fostering technical excellence.

• Bachelors degree in computer engineering electrical engineering or related field; Masters strongly preferred.
• 10 years of experience architecting and delivering FPGA-based systems.
• Expert proficiency in VHDL and RTL design methodologies.
• Proven track record in resolving complex timing closure and signal integrity challenges.
• Deep expertise with advanced multi-clock domain architectures and clock domain crossing techniques.
• Mastery of formal verification methodologies and simulation frameworks.

• Proficiency in embedded C/C and hardware-software co-design principles.
• Experience in architecting solutions on Microchip PolarFire SoC platforms.
• Strong Linux kernel development and advanced bash scripting capabilities.
• Container orchestration experience with Docker and modern CI/CD pipelines.
• Outstanding technical documentation and cross-functional leadership in complex engineering environments.

• Lead integrated cross-functional teams spanning embedded software FPGA and hardware disciplines.
• Shape technical direction and influence product architecture beyond traditional FPGA scope.
• Own complete design lifecycle with significant organizational impact and technical autonomy.

Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiants 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 todays advanced reactor builders dont wait for job postings. They join the winning team. If thats you contact us directly for immediate opportunities: .

Benefits and Perks for Eligible Employees:

• Stock: Substantial incentive stock plan for all full-time employees.
• Medical: 100% premium coverage for base Silver level plan for employee 50% premium coverage for dependents. Platinum plans available.
• One Medical: Sponsored memberships for eligible employees and their dependents.
• Vision: 100% premium coverage for top tier plan 50% for dependents.
• Dental: 100% premium coverage for top tier plan (including orthodontia) 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.
• Burgeoning satellite offices in Oak Ridge TN and Washington D.C. near Capitol Hill.

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 applicants capacity to serve in compliance with U.S. export controls.