Senior Software Engineer - Tools And Infrastructure

Senior Software Engineer - Tools & Infrastructure

About the Role

Radiant is seeking a Senior Software Engineer for Internal Tools & Infrastructure to develop the software infrastructure, developer tooling, and data processing capabilities that power our engineering organization. In this deeply technical role, you will design and implement platform systems that enable faster iteration on reactor designs, sophisticated Digital Twin simulation and visualization, and data-driven analysis across the company. You will work in a highly interdisciplinary environment to solve complex technical challenges that accelerate our path to deploying the world's first mass-produced nuclear reactor.

Responsibilities and Duties

• Hands-on development of internal platforms that provide real-time monitoring, Digital Twin visualizations, simulation post-processing, and analysis tools for Kaleidos reactor systems.
• Build infrastructure and tooling necessary to maintain high-quality standards and detect issues in real time across engineering systems.
• Design and implement integration platforms that enable seamless data flow across Radiant's engineering ecosystem, using connectors and APIs to bridge CAD systems, Multiphysics simulation tools, data acquisition systems, and engineering databases.
• Collaborate on technical initiatives across software, simulation, electrical, mechanical, and nuclear teams.
• Work across teams to integrate software with hardware platforms, control systems, and external software tools.
• Design and build internal developer tooling, including CI/CD pipelines, version control systems, artifact management, build systems, developer environments, testing frameworks, and release processes.

Required Qualifications

• Bachelor's degree in computer science, physics, mechanical engineering, or a related engineering field.
• 5+ years of professional software engineering experience with deep expertise in developer productivity, software tooling, infrastructure, compute, or platform engineering.
• Expert-level proficiency in programming languages such as Python, Golang, Rust, C#, or C/C++.
• Deep understanding of system design, data structures, algorithms, and distributed systems architecture with a track record of designing systems from the ground up.
• Strong foundation in software engineering best practices, including version control, code review, testing, and CI/CD methodologies.
• Extensive hands-on experience in distributed software development, building systems, and infrastructure automation.
• Expert-level knowledge of containerization (Docker), orchestration (Kubernetes), and infrastructure-as-code tools (Terraform, Ansible, etc.).
• Significant experience architecting and implementing systems in hybrid cloud/on-premises environments, specifically AWS and Linux.
• Familiarity with Git version control, Docker containerization, and common CI/CD frameworks for automated build and deployment pipelines.

Preferred Qualifications

• Experience in highly regulated industries (aerospace, defense, automotive, nuclear, or medical devices).
• Technical understanding of simulation workflows, computational modeling, or scientific computing infrastructure.
• Hands-on experience with big data processing systems (Spark, Hadoop, Airflow, Trino, Kubernetes-based platforms)
• Proven track record in architecting distributed systems, databases, large-scale data systems, and high-performance backend APIs.
• Experience with observability and monitoring systems using Datadog, Grafana, Prometheus, InfluxDB, or similar tools.
• Familiarity with TypeScript, React, Angular, Vite, Node.js, and other modern web frameworks.
• Track record in building developer platforms or infrastructure-as-a-service systems.
• Previous experience working in an embedded SWE role is a plus.

Work Environment

• Must work 100% onsite at El Segundo HQ.
• Must be willing to work extended hours and weekends as necessary to accomplish our mission.