Radiant builds Kaleidos, a portable, factory-built nuclear microreactor that delivers a megawatt of clean power anywhere it is needed. Backed by a16z, Felicis and USV.
About the role
Radiant is seeking a Senior Electrical Engineer with a strong focus on full-stack PCB development, including mixed-signal design, high-speed interfaces, power distribution, and signal integrity, while supporting data acquisition, signal conditioning, estimation, and real-time processing functions critical to reactor control. To lead the electrical architecture for terrestrial reactor control systems, with a long-term path toward space reactor applications.
What they're looking for
- Bachelor’s degree in Electrical Engineering or a related field
- 5+ years of experience designing custom PCBs, including multilayer and mixed-signal boards
- Strong experience with schematic capture and PCB layout tools (e.g., Altium, Cadence, or similar)
- Solid understanding of signal integrity, power integrity, grounding strategies, and EMI/EMC mitigation techniques
- Experience with analog and mixed-signal design, including sensor interfaces, ADC/DAC integration, and low-noise design practices
- Familiarity with high-speed interfaces (e.g., SPI, I2C, UART, Ethernet) and layout constraints
More about this role
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 Senior Electrical Engineer with a strong focus on full-stack PCB development, including mixed-signal design, high-speed interfaces, power distribution, and signal integrity, while supporting data acquisition, signal conditioning, estimation, and real-time processing functions critical to reactor control. To lead the electrical...
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