Principal Embedded Software Engineer

The role

You will set the technical direction for embedded software across instrumentation and control systems. You will define architecture, establish engineering standards, and develop mission-critical embedded systems that interface with sensors and actuators for a nuclear microreactor.

What you will do

• Define and own the embedded software architecture for I&C systems
• Lead design and development of reliable, fault-tolerant embedded software
• Develop and bring up new drivers for I&C hardware
• Serve as the senior technical voice in design reviews
• Own the full engineering lifecycle from architecture through field implementation
• Establish hardware and software testing frameworks and documentation standards
• Mentor embedded engineers across the team
• Partner with electrical, controls, and hardware engineering leadership

Required qualifications

• Bachelor's degree in computer engineering, computer science, electrical engineering, or a related field
• 8+ years of industry experience in embedded software
• Significant ownership of system-level architecture decisions
• Experience driving architecture across complex, multi-subsystem embedded programs
• Hands-on experience with an RTOS (Zephyr, NuttX, ThreadX, etc.)
• Low-level bring-up and porting experience
• Deep proficiency in embedded C/C++
• Track record of influencing technical direction through documentation, standards, or cross-functional alignment
• Strong communicator

Nice to have

• 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
• Experience in safety-critical or high-reliability domains (aerospace, defense, medical, nuclear, or industrial)

Benefits

• Substantial incentive stock plan
• Medical: 100% up to base silver level plan for employee + 50% dependents
• 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 offered as employee contributed benefits
• 8-weeks of paid parental leave
• Additional paid pregnancy leave for CA employees
• Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University
• Daily catered lunch
• Free snacks and drinks
• Flexible PTO policy

Before you apply

• Any job offer made will be contingent upon the applicant's capacity to serve in compliance with U.S. export controls

About the company

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force.