Staff React Frontend Engineer

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Nuclearn

Staff React Frontend Engineer

Phoenix, AZ
Full Time
Paid
  • Responsibilities

    Senior/Staff React Frontend Engineer

    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

    • 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)

    Product Mindset

    • 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)

    1. 20-min intro with the founder/hiring manager to trade context and assess mutual fit
    2. Practical work sample (60–90 min; a real task in our stack)
    3. Team meet + peer programming (system design + collaboration)
      We aim to move from first chat to decision quickly.