Radiant careers
Radiant is hiring: 67 open roles as of November 13, 2026, 7% remote, 47% of them senior level. Posted pay runs $134k–$263k. The roles ask most for Python, financial modeling and GAAP.
Which of Radiant’s 67 roles fit you?
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- Staff Mechanical Design Engineer, TurbomachineryEl Segundo
- Principal Mechanical Design Engineer, TurbomachineryEl Segundo
- Lead, Test EngineeringEl Segundo
- Senior Test Engineer, Mechanical/FluidsEl Segundo
- Test Engineer, Mechanical/FluidsEl Segundo
Radiant is building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling.
Open roles
67
Founded
2019
Headcount
567
Remote roles
7%
Hiring now · checked today
Radiant has 67 roles open right now.
landed applies to the ones that fit you on Radiant's own site, the hour they go live.
landed · Radiantautopilot on
Staff Mechanical Design Engineer, Turbomachinery
El Segundo, CA
Principal Mechanical Design Engineer, Turbomachinery
El Segundo, CA
Lead, Test Engineering
El Segundo, CA
67 open
Open roles at Radiant
Checked on Radiant’s careers page
Staff Mechanical Design Engineer, Turbomachinery
Radiant
El Segundo, CA
Staff Mechanical Design Engineer, Turbomachinery
El Segundo, CA
$201k–$314k
2d ago
Principal Mechanical Design Engineer, Turbomachinery
Radiant
El Segundo, CA
Principal Mechanical Design Engineer, Turbomachinery
El Segundo, CA
$201k–$314k
2d ago
Lead, Test Engineering
Radiant
El Segundo, CA
Lead, Test Engineering
El Segundo, CA
$141k–$202k
2d ago
Senior Test Engineer, Mechanical/Fluids
Radiant
El Segundo, CA
Senior Test Engineer, Mechanical/Fluids
El Segundo, CA
$134k–$185k
2d ago
Test Engineer, Mechanical/Fluids
Radiant
El Segundo, CA
Test Engineer, Mechanical/Fluids
El Segundo, CA
$107k–$146k
2d ago
Principal Thermal Modeling Analyst
Radiant
El Segundo, CA
Principal Thermal Modeling Analyst
El Segundo, CA
$182k–$293k
2d ago
Principal Thermal-Hydraulics Engineer
Radiant
El Segundo, CA
Principal Thermal-Hydraulics Engineer
El Segundo, CA
$182k–$293k
2d ago
Lead, Fluid Systems Engineering
Radiant
El Segundo, CA
Lead, Fluid Systems Engineering
El Segundo, CA
$151k–$208k
2d ago
Apply to Radiant with landed
Radiant hires through Ashby. landed applies on Radiant’s own Ashby form, with your résumé tailored and every question answered for the role.
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7% remote
Radiant remote jobs
7% of Radiant’s open roles are remote. These are the remote roles open now, read from Radiant’s own careers page.
Lead Reactor Operations Engineer
Radiant
El Segundo, CA
Lead Reactor Operations Engineer
El Segundo, CA
$161k–$224k
8w ago
Principal Nuclear Engineer
Radiant
El Segundo, CA
Principal Nuclear Engineer
El Segundo, CA
$196k–$263k
9w ago
Nuclear Engineer, Core Physics
Radiant
El Segundo, CA
Nuclear Engineer, Core Physics
El Segundo, CA
$107k–$146k
14w ago
Senior Nuclear Engineer
Radiant
El Segundo, CA
Senior Nuclear Engineer
El Segundo, CA
$134k–$185k
14w ago
Senior Electrical Engineer, HIL (hardware-in-the-loop)
Radiant
El Segundo, CA
Senior Electrical Engineer, HIL (hardware-in-the-loop)
El Segundo, CA
$158k–$219k
23w ago
Posted pay
Radiant salary by role
Across Radiant’s postings that list pay, the middle of the range runs $134k–$263k. The highest posted range right now is $201k–$314k for Staff Mechanical Design Engineer, Turbomachinery. Ranges are base pay as the company posts it.
| Role | Postings with pay | Posted range |
|---|---|---|
| Staff Mechanical Design Engineer, Turbomachinery | 1 | $201k–$314k |
| Principal Mechanical Design Engineer, Turbomachinery | 1 | $201k–$314k |
| Principal Turbomachinery Engineer | 1 | $201k–$314k |
| Staff Turbomachinery Engineer | 1 | $201k–$314k |
| Principal Electrical Engineer, Electronics | 1 | $201k–$314k |
| Principal Electrical Engineer, HIL (hardware-in-the-loop) | 1 | $201k–$314k |
| Principal Embedded Software Engineer | 1 | $201k–$314k |
| Staff Mechanical Engineer, Fluid Systems | 1 | $201k–$314k |
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Frequently asked
Is Radiant hiring right now?
Yes. Radiant has 67 open roles live on its own careers page today, and the list above refreshes daily.
Does Radiant hire remote?
About 7% of Radiant’s open roles are remote. The rest are based in its offices, including El Segundo, US.
What does Radiant pay?
Across the Radiant postings that list pay, the middle of the range runs $134k–$263k.
How do I apply to Radiant?
Radiant takes applications on Ashby. Every role above links to Radiant’s own application. Or let landed apply for you: it fills the company’s form with your profile and writes the answers for each role.
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