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 highly motivated Senior Build Engineer to lead the assembly, integration, and build execution of high-performance turbomachinery systems for our portable nuclear microreactor. This is a hands-on engineering role requiring strong mechanical fundamentals, precision assembly experience, and the ability to independently solve complex hardware challenges. Found on 1752vc Careers, the job board for startup and VC roles.
What they're looking for
- Bachelor's degree in Mechanical Engineering, Aerospace Engineering, or a related engineering discipline
- 5+ years of relevant experience in mechanical assembly, hardware integration, manufacturing, or build engineering involving complex mechanical systems
- Demonstrated hands-on experience assembling, integrating, and troubleshooting precision mechanical hardware
- Strong understanding of GD&T, tolerance stack-ups, mechanical fits, fasteners, torque requirements, and alignment principles
- Proficiency in reading and interpreting complex engineering drawings, assembly documentation, and 3D CAD models
- Experience developing assembly procedures, troubleshooting hardware issues, and improving build processes
More about this role
Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.
Radiant is seeking a highly motivated Senior Build Engineer to lead the assembly, integration, and build execution of high-performance turbomachinery systems for our portable nuclear microreactor. This is a hands-on...
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