Senior Embedded Systems Architect for Nuclear Microreactors

Radiant; El Segundo, Northern (CA, KY); Hybrid; USD 180,000 - 240,000; Full time

Benefits offered by this job

Stock plan

Comprehensive health benefits

Onsite meals and snacks

Parental leave - 8 weeks

Flexible PTO

Job summary

Radiant is seeking a Principal Embedded Software Engineer to define the architecture for embedded software across instrumentation and control systems for a first-of-its-kind portable nuclear reactor.

You will own the full engineering lifecycle, drive design reviews, and mentor engineers onsite at El Segundo HQ while shaping the software foundation of Radiant's mission-critical technology.

Qualifications

• Must have architecture ownership of embedded programs, not just features.
• Hands-on with RTOS (Zephyr/NuttX/ThreadX) and low-level bring-up.
• Deep proficiency in embedded C/C++ and hardware/software boundary debugging.
• Experience influencing technical direction through standards and documentation.
• Strong communication to align across engineering, program and leadership.

Responsibilities

• Define and own the embedded software architecture for I&C systems, establishing scalable patterns and standards.
• Lead design and development of reliable, fault-tolerant embedded software for production hardware.
• Develop and bring up new drivers for I&C hardware across sensing/subsystems.
• Serve as senior technical voice in design reviews, surfacing risks and driving cross-subsystem decisions.
• Own the full engineering lifecycle from architecture to field implementation.
• Establish testing frameworks and documentation standards meeting safety requirements.
• Mentor embedded engineers and model technical excellence.
• Partner with electrical, controls, and hardware leadership on interfaces.

Skills

Embedded software architecture

RTOS experience (Zephyr/NuttX/ThreadX)

Embedded C/C++

System-level ownership

Strong communicator

Education

Bachelor's degree in related field

Tools

Zephyr RTOS

CMake

Simulink Autocode C++ export

Job description

Radiant is seeking a Principal Embedded Software Engineer to define the architecture for embedded software across instrumentation and control systems for a first-of-its-kind portable nuclear reactor.

You will own the full engineering lifecycle, drive design reviews, and mentor engineers onsite at El Segundo HQ while shaping the software foundation of Radiant's mission-critical technology.