Nuclearn

Nuclearn automates critical nuclear plant workflows using AI to reduce manual, time-consuming tasks and improve safety and efficiency. The company builds nuclear-specific, pre-trained AI models and software developed by an in-house data science team with industry veterans; its approach leverages machine learning and domain expertise tailored to reactor operations. Nuclearn supplies its solutions to nuclear operators and power plants, with deployments across more than 60 reactors worldwide. The product is delivered as enterprise software for plant operators and engineering teams and is grounded in patented techniques and operational experience. Nuclearn targets the nuclear power market, focusing on operational scale, regulatory constraints, and workforce modernization needs.

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Nuclearn

HQPhoenix, US

Team Size26

Open Jobs4

Total Funding$13M

Latest Fundraise6 months ago

TL;DR

Founded: 2021

Headquarters: Phoenix, Arizona

Product: Nuclear-specific AI models and enterprise software (AtomAssist, SPARK models, Nuclearn Agents)

Customers / Deployments: Deployed across more than 60 reactors

Recent funding: $10.5M Series A (Sept 9, 2025); prior $2.5M seed (Aug 2023)

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Company Overview

Problem Domain

Operational efficiency, documentation automation, and workforce modernization for nuclear power plant operations under strict regulatory requirements.

Founded

2021

Industry

Software Development

Funding Track Record

Seed- 2023-08

2,500,000 USD

Seed announced Aug 10, 2023

Series A- 2025-09-09

10,500,000 USD

Series A reported Sept 9, 2025

Investor Signal

“Blue Bear Capital, AZ-VC, Nucleation Capital, SJF Ventures”

Join the Team

Senior/Staff React Frontend Engineer

On-SitePhoenix, AZ, US

On-Site • Phoenix, AZ, US

Why Nuclearn.ai Nuclearn.ai builds AI-powered software for the nuclear and utility industries—tools that keep critical infrastructure reliable, efficient, and safe. Our software integrates AI-driven workflow, documentation, and research automation, and is already used at 60+ nuclear reactors across North America. You'll ship production code operators and engineers rely on every day.

We're growing quickly, expanding our team and our Phoenix HQ. The work is consequential: what you build helps real plants run safer and smarter.

Eligibility: U.S. citizenship or permanent residency (green card) is required due to DOE export compliance.

What You'll Do

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Product Designer

Part-timeManchester, GB

Part-time • Manchester, GB

Mobile Developer

ContractManchester, GB

Contract • Manchester, GB

Machine Learning Engineer

Part-timeTel Aviv

Part-time • Tel Aviv

Machine Learning Engineer

InternshipNiš, RS

Internship • Niš, RS

AI Researcher

Part-timeTel Aviv

Part-time • Tel Aviv

Technical Writer

Part-timeSan Francisco, US

Part-time • San Francisco, US

Architect scalable frontend systems that handle complex data workflows and real-time updates

Build sophisticated data visualizations that make ML model outputs interpretable and actionable

Design and implement component libraries that balance flexibility with consistency

Optimize performance for data-heavy applications while maintaining excellent UX

Collaborate deeply with backend engineers, data scientists, and domain experts to translate complex requirements into elegant interfaces

Establish frontend standards and drive technical decisions across the engineering team

Mentor engineers and elevate the entire team's frontend capabilities

Ship features end-to-end from concept to production, owning the quality and user experience

Examples of problems you might own in your first 90 days

Building real-time monitoring interfaces used in mission-critical nuclear operations
Designing complex, high-dimensional ML visualization components that make automated insights actionable
Establishing a robust frontend architecture and shared component system that scales with the engineering team

What Makes You a Great Fit Technical Excellence

7+ years building production web applications with deep expertise in React and modern JavaScript/TypeScript
Mastery of state management patterns (Redux, Zustand, React Query, Context, etc.)
Strong computer science fundamentals, including performance optimization and debugging complex systems
Experience architecting large-scale applications designed for long-term maintainability
Proficiency with modern tooling (Vite/Webpack, testing frameworks, CI/CD)

You think beyond implementation—asking why and should we as often as how
Experience collaborating with designers, or designing interfaces yourself when needed
Track record of creating intuitive, delightful user experiences
Comfortable making pragmatic tradeoffs in ambiguous and fast-changing environments

Communication & Leadership

Ability to explain complex technical decisions to non-technical stakeholder
Experience mentoring engineers and performing thoughtful code reviews
Skilled at driving consensus and influencing technical direction
Thrive in a collaborative, fast-paced startup environment

Self-Directed Impact

Able to contribute independently within 6 weeks
High degree of ownership and ability to drive problems end-to-end
Proactively identifies improvements and executes on them

Nice To Have (not Required)

Experience with data visualization libraries (D3.js, Recharts, Plotly, etc.)
Background in complex domains (scientific, industrial, financial, healthcare)
Contributions to open source or technical writing
Experience with WebGL, Canvas, or high-performance graphics
Knowledge of accessibility (WCAG) and building inclusive interfaces
Full-stack capabilities or strong understanding of backend systems
Prior startup experience or leading engineering initiatives

Impact You'll Have (near-term roadmap)

Improve the reliability and usability of interfaces used daily at nuclear power plants
Shape the foundation of our shared component library & frontend patterns
Lead development of new visualization systems for ML-driven analysis and operator workflows

Work Model & Schedule

Full-time, salaried
Mon–Fri hybrid (Wed remote); expectation is ≥80% in-office (Phoenix HQ)

How We Hire (fast, Respectful, Practical)

20-min intro with the founder/hiring manager to trade context and assess mutual fit
Practical work sample (60–90 min; a real task in our stack)
Team meet + peer programming (system design + collaboration) We aim to move from first chat to decision quickly.

Nuclearn

Nuclearn

TL;DR

Related Companies

Company Overview

Problem Domain

Founded

Industry

Funding Track Record

Investor Signal

Founders

What we do

Join the Team

Senior/Staff React Frontend Engineer

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Product Designer

Mobile Developer

Machine Learning Engineer

Machine Learning Engineer

AI Researcher

Technical Writer