# Senior Thermofluids Systems Engineer, Power Conversion at Radiant

- Company: Radiant
- What the company does: 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.
- Company website: https://www.radiantnuclear.com
- Type: Startups
- Level: Senior
- Location: El Segundo, CA
- Work setup: On-site
- Pay: $158K to $219K base salary per year (USD)
- Posted: 2026-08-12
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/radiant-industries/69e93d17-55b5-4ea8-b9c3-be562597af08
- Page: https://www.1752.vc/careers/jobs/radiant-senior-thermofluids-systems-engineer-power-conversion/

## About the role

Own system-level thermodynamic performance modeling of the power conversion architecture, including design and off-design operating points across startup, shutdown, transients, and off-nominal conditions. Develop and maintain interface requirements and boundary conditions (pressures, temperatures, flow rates, control signals) for fluid system components, pressure equipment, turbomachinery, and power electronics.

## What they're looking for

- Bachelor's degree in Mechanical, Aerospace, Chemical, or Systems Engineering from an accredited institution
- 5+ years of experience in thermodynamic/power cycle modeling, systems engineering, or performance engineering, including requirements development and system-level verification
- Strong working knowledge of thermodynamics and fluid dynamics as applied to power generation cycle design
- Proficiency in system modeling tools such as MATLAB, Simulink, or Python for performance and simulation analysis
- Strong first-principles analytical skills, with the ability to manage competing priorities and communicate program status clearly
- Experience with fluid system architecture, including piping, compressors, valves, and heat exchangers

Tags: Engineering