Control Systems Test Engineer

Radiant•El Segundo, CA

1d•$74,000 - $172,725•Onsite

About The Position

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 failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. 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 utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Control Systems Test Engineer Radiant is seeking a highly motivated and detail-oriented Control Systems Test Engineer to join our team. In this role, you will be responsible for developing, maintaining, executing, and automating test cases across the full testing lifecycle for our reactor control systems. You will collaborate closely with systems engineers, controls developers, and software teams to ensure the highest quality and reliability in safety-critical control software.

Requirements

Bachelor’s degree in Electrical Engineering, Computer Engineering, Mechanical Engineering, Controls Engineering, Computer Science, or related discipline.
2+ years of experience with Simulink/Matlab and working with dynamic system models.
Strong understanding of software testing principles, including 2+ years of experience in unit, integration, SiL, HiL, and system testing.
Proficiency in coding/scripting for test automation (e.g., Python, Golang, or similar).
Hands-on experience with Simulink Test or equivalent test execution frameworks.
Excellent analytical skills and attention to detail.
Strong written and verbal communication skills.

Nice To Haves

Experience with safety-critical or regulated systems (e.g., aerospace, automotive, energy).
Familiarity with version control systems (e.g., Git) and CI/CD pipelines.
Prior exposure to automated test frameworks, hardware interfaces, and real-time data capture.

Responsibilities

Analyze and review control system Simulink models and associated design artifacts to understand system behavior and expected performance.
Study and interpret system requirements for the reactor control system to develop comprehensive test coverage.
Develop and maintain detailed test artifacts, including: Unit test cases Software-in-the-Loop (SiL) test cases Hardware-in-the-Loop (HiL) test cases Hardware test cases
Execute all test cases across the testing spectrum: Unit testing SiL testing HiL testing Full hardware testing
Automate testing workflows for SiL, HiL, and HW test cases using scripting languages such as Python or Go (Golang).
Run and manage structured test campaigns, including regression suites.
Execute and manage unit tests within the Simulink Test environment.
Document all testing results clearly and concisely in test reports, including metrics, pass/fail criteria, and issues.
Work collaboratively with developers and system engineers to identify root causes and support the resolution of defects.
Contribute to continuous improvement of test processes, frameworks, and tools.

Benefits

Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
One Medical: Sponsored memberships for eligible employees and their dependents.
Vision: 100% premium coverage for top tier plan + 50% for dependents.
Dental: 100% premium coverage for top tier plan (including orthodontia) + 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.
Burgeoning satellite offices in Oak Ridge, TN and Washington, D.C., near Capitol Hill.