Senior Frontend Software Engineer

• Radiant is seeking a Senior Software Engineer to own the frontend for our in-house telemetry and fleet management platform
• You’ll join the Mission Software team, build on top of a highly technical telemetry streaming platform, and work on fleet monitoring systems for Radiant’s portable nuclear reactor, Kaleidos
• You’ll also build additional features for engineers and operators, adding new data analysis and configuration capabilities to a critical platform
• The code you write will help design, run, and mass-produce the first high-temperature gas-cooled portable microreactor ever to be commercialized
• Own critical parts of the frontend for our internal telemetry and fleet management platform, working in a modern React + TypeScript + Vite codebase
• Develop highly reliable, performant systems for data review and analysis
• Develop frontend pages for complex device configuration and telemetry systems
• Collaborate with other members of the Mission Software team and reach consensus among stakeholders across the company
• Our Tech Stack:
• Typescript
• React
• Vite
• Pixi.js & Yjs
• Rust + Axum Web / Python + FastAPI
• Must be willing to work extended hours and weekends as necessary to accomplish our mission

Benefits

• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
• Equity: Substantial incentive stock plan for all salaried employees
• Dental: 100% coverage, orthodontia extra, 50% for dependent
• Flexible PTO policy
• Vision: 100% coverage + 50% for dependents
• Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits
• Beautiful El Segundo headquarters close to the Pacific Ocean
• Team-bonding company outings, happy hours and in-person camaraderie

• The ideal candidate is outgoing and organized, ready to collaborate with other engineers
• Strong code review & debugging skills
• Experience building highly performant, complex, mission-critical systems using technologies like WebSockets, WebRTC, or SSE
• 5+ years of professional experience in web development, frontend development, and / or desktop GUI development
• Bachelor’s degree in Computer Science, Engineering, Physics, or a related technical field
• Has worked on a complicated UI system before, driving forward critical features
• Proficient in using React + TypeScript for SPAs, testing with Jest + Playwright
• Experience using the following technologies: TanStack Query + React Router, Pixi.js + WebGPU, Yjs or similar CRDT
• Hands-on hardware tech experience, working closely with hardware engineers to develop deeply coupled applications
• HMI or dashboarding design experience