Radiant Industries

Principal Embedded Software Engineer

El Segundo, CA · Principal · Contract

Sponsorship not specifiedDetected 54 days ago

C++HRISEmbedded SystemsElectrical EngineeringHardware DesignSimulinkLeadershipActuators

About the role

Radiant is seeking a Principal Embedded Software Engineer to set the technical direction for embedded software across instrumentation and control (I&C) systems.
You will have the opportunity to shape the embedded software foundation of the first commercialized portable nuclear microreactor, technology that will redefine how the world accesses clean, reliable power.
Mentor embedded engineers across the team; model technical excellence and engineering judgment.

Define and own the embedded software architecture for I&C systems, establishing patterns and standards that scale across the full program lifecycle.
Lead design and development of reliable, fault-tolerant embedded software for production hardware operating in demanding environments.
Develop and bring up new drivers for I&C hardware across a range of sensing and actuation subsystems.
Serve as the senior technical voice in design reviews, setting the bar for rigor, surfacing systemic risks, and driving decisions that span multiple subsystems and teams.
Own the full engineering lifecycle, from architecture through test, build, and field implementation, and set expectations for how the team executes that lifecycle.
Partner with electrical, controls, and hardware engineering leadership to align on cross-disciplinary interfaces and constraints.
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors.
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.

Bachelor's degree in computer engineering, computer science, electrical engineering, or a related field.
8+ years of industry experience in embedded software, including significant ownership of system-level architecture decisions.
Hands-on experience with an RTOS (Zephyr, NuttX, ThreadX, etc.), including low-level bring-up and porting.
Deep proficiency in embedded C/C++.
Track record of influencing technical direction beyond your immediate team, through documentation, standards, or cross-functional alignment.
Experience with Zephyr RTOS at an architectural or maintainer level.
Experience working with Simulink Autocode C++ export in a production context.
Experience with CMake in large, multi-target embedded builds.
Proficiency in reading and interpreting hardware schematics
ability to debug at the hardware/software boundary.
Proficiency in reading and interpreting hardware schematics; ability to debug at the hardware/software boundary.
Experience in safety-critical or high-reliability domains (aerospace, defense, medical, nuclear, or industrial).

100% top tier plan coverage + 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.
Flexible PTO policy.

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.
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.

This listing is sourced directly from Radiant Industries's careers page and normalized into a canonical job model.