Senior Front End Software Engineer
radiantEl Segundo (CA)
About the role
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
BenefitsEquity: Substantial incentive stock plan for all salaried employees
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits
Dental: 100% coverage, orthodontia extra, 50% for dependent
Vision: 100% coverage + 50% for dependents
Flexible PTO policy
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 engineersStrong code review & debugging skillsExperience building highly performant, complex, mission-critical systems using technologies like WebSockets, WebRTC, or SSE5+ years of professional experience in web development, frontend development, and / or desktop GUI developmentBachelor’s degree in Computer Science, Engineering, Physics, or a related technical fieldHas worked on a complicated UI system before, driving forward critical featuresProficient in using React + TypeScript for SPAs, testing with Jest + PlaywrightExperience using the following technologies: TanStack Query + React Router, Pixi.js + WebGPU, Yjs or similar CRDTHands-on hardware tech experience, working closely with hardware engineers to develop deeply coupled applicationsHMI or dashboarding design experience
Before you apply
Applying takes about a minute. These four things decide how fast it moves after that.
Your profile is current
It's what we read first. Occupations, seniority and locations matter more than a long history.
Two examples you can talk through
Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.
A number in mind
What you're on now and what would make you move. We negotiate better when we know both.
Your notice period
Employers plan around it, and it's the question that stalls offers most often.
Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.
More like this