Test Engineer

About Radiant

Radiant is an El Segundo, CA-based startup 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. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. 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.

Responsibilities

• Perform testing as a Test Conductor/Test Director to gain firsthand experience, ensuring procedures align with real-world execution.
• Collaborate closely with engineers to improve test system interfaces, procedural workflows, and software tools.
• Support testing and iterative improvements of fluid, electrical, and structural hardware of the Kaleidos reactor through development, qualification, and acceptance testing.
• Support one-off test campaigns in a fast-paced, minimum-requirements environment to drive hardware risk reduction.
• Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation.

Qualifications

• 2+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.
• Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
• Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
• Demonstrated ability to lead projects and work independently.
• Strong technical fundamentals in fluids and thermodynamics.
• Strong written and verbal communication skills.
• Flexible and adaptable mindset - self-driven with the ability to seek out requirements with minimal direction.

Benefits

• Stock: Substantial incentive stock plan for all full-time employees.
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
• 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 are offered as employee contributed benefits.
• 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
• Daily catered lunch. Free snacks and drinks.
• Flexible PTO policy.
• Remote workday allocation.
• Company and team-bonding events, happy hours and in-person camaraderie.
• Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation And Benefits

• Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits.
• Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.