DevOps Engineer

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.

DevOps Engineer

Radiant is seeking a driven DevOps Engineer to support software infrastructure, deployment, and automation projects. In this role, you will collaborate across the entire org and work closely with the software team to build scalable, secure, and resilient DevOps practices, tools, and systems. The infrastructure you manage, pipelines you build, and analysis tools you create and maintain will be used to design, run, and analyze the first new reactor design in 50 years. You will have the opportunity to build a strong foundation for production.

Responsibilities And Duties

- Support and maintain infrastructure across AWS and on-premises Linux environments, contributing to high availability, security, and performance for mission-critical systems.

- Assist in managing Kubernetes and Docker container orchestration to run simulations, internal tools, and engineering applications.

- Build and maintain CI/CD pipelines using Git, Argo, and other automation tools to support software delivery across engineering teams.

- Develop and maintain internal tooling for build systems, testing frameworks, deployment automation, and developer environments.

- Contribute to infrastructure-as-code practices using Terraform, Ansible, or similar tools to ensure reproducible, version-controlled infrastructure deployments.

- Support observability, monitoring, and logging infrastructure to help ensure system reliability and enable rapid incident response.

- Learn and apply security best practices, compliance requirements, and access controls across cloud and on-premises infrastructure.

- Grow technical expertise in DevOps practices, infrastructure patterns, and automation techniques through hands-on work and mentorship.

Required Qualifications And Skills

- Bachelor's degree in Computer Science, Engineering, or a related technical field.

- 3+ years of professional experience in DevOps, Site Reliability, Infrastructure, or Platform Engineering. - Strong proficiency in programming languages such as Python, Golang, Rust, C#, or C/C++.

- Proficiency with Kubernetes and Docker for orchestration and deployment.

- Experience with Git and CI/CD tools (Argo, GitLab CI, Jenkins, GitHub Actions), designing automated build, test, and deployment pipelines.

- Strong coding skills, developing automation and monitoring tools, internal applications, and infrastructure software.

- Ability to work from Radiant's office in El Segundo, CA (greater Los Angeles), full-time.

Desired Qualifications And Skills

- Exposure to deploying and maintaining cloud-native applications, with interest in microservices architectures, service mesh technologies, and distributed systems.

- Familiarity with infrastructure monitoring and observability tools like Datadog, Grafana, InfluxDB, Prometheus, Nagios, etc.

- Experience or interest in highly regulated industries (aerospace, defense, automotive, nuclear, or medical devices).

- Passion for clean, maintainable code and building automation that enhances developer productivity and accelerates engineering velocity.

- Eagerness to work cross-functionally with engineering teams in different disciplines such as mechanical, electrical, materials, and nuclear.

Additional Requirements

- Must be willing to work extended hours and weekends as necessary to accomplish our mission.

- Must work 100% onsite at El Segundo HQ.

Total Compensation And Benefits

Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications.

Benefits And Perks For Eligible Employees

- 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.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.

Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.