Senior Frontend Engineer (React)

We are seeking a Senior Frontend Engineer to join our product engineering team. In this role, you will design and build key parts of the Ion Factory OS frontend, a platform used by cutting-edge manufacturers building the next generation of products, from electric aircraft to autonomous robotics.

As a technical contributor, you will tackle complex frontend challenges, collaborate closely with peers, and help establish the patterns that will scale our platform for years to come. This is a unique opportunity to shape a product that is critical to companies tackling society’s greatest challenges, from climate change and space exploration to autonomous transportation.

What You'll Do

Design and Build Scalable Frontend Systems : Implement a performant and maintainable frontend for the Ion Factory OS, our core manufacturing platform.

Elevate the Team : Contribute to code reviews and design discussions, sharing knowledge and fostering a culture of quality and continuous improvement.

Drive Frontend Quality : Help guide technology decisions on our frontend technology stack, including state management (e.g., Apollo Client, Urql), component libraries, testing frameworks, and build pipelines.

Build for Scale and Performance : Develop reusable, resilient React components and JavaScript libraries, optimizing them for maximum performance and real-time data updates across a multi-tenant SaaS environment.

Champion Best Practices : Write clean, testable code and advocate for best practices in architecture, testing, and documentation.

Collaborate Cross-Functionally : Partner closely with product management, UX / UI design, and backend engineering to translate product specifications and complex user workflows into elegant, robust, and intuitive user-facing features.

Contribute to the Technical Roadmap : Help identify and propose improvements to frontend systems and architecture, supporting long-term scalability and performance.

What You'll Bring (Minimum Qualifications)

5+ years of professional experience in frontend software development, with a proven track record of shipping complex, large-scale web applications.

Strong proficiency in modern JavaScript / TypeScript, React and related frameworks (Next.js or similar), with a deep understanding of its core principles, hooks, and ecosystem.

Experience designing, building, and consuming complex GraphQL APIs.

Demonstrated experience working on a collaborative engineering team, with a passion for writing maintainable, high-quality code.

Solid understanding of frontend architecture and design patterns, with experience building and maintaining scalable frontend systems in a SaaS, multi-tenant environment.

Proficiency with modern frontend development tools and pipelines (e.g., Webpack, Babel, NPM) and version control (Git / GitHub).

Experience implementing robust testing strategies across the testing pyramid (unit, integration, E2E) using frameworks like Jest or Cypress.

Familiarity with modern authorization mechanisms, such as JSON Web Tokens (JWT).

Bonus Points (Preferred Qualifications)

Experience contributing to or maintaining a shared component library or design system.

Hands-on experience with GraphQL clients such as Apollo Client or Urql.

Experience with advanced architectural patterns like micro-frontends.

Professional experience working directly with product design and UI / UX experts to help make enterprise-grade design decisions.

Experience with Agile development methodologies and tools.

Benefits & Perks

Health Insurance; medical, vision, dental, & life insurance.

Paid Parental Leave.

Employee Stock Option Plan.

Team outings, group lunches, open office, happy hours.

Paid holidays, sick days.

Flexible Friday and PTO.

401K.

First Resonance is an equal opportunity employer dedicated to building an inclusive and diverse workforce.

First Resonance participates in E-Verify. As part of our onboarding process, a new hire's Form I-9 information will be shared with the federal government to confirm they are authorized to work in the U.S.

Pay is based on factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience and skillset, and location.

First Resonance accelerates the speed and reliability of hardware development for companies manufacturing the next generation of hardware products. This includes space exploration, electric airplanes, autonomous vehicles, nuclear reactors, robotics, and more. We are a group of software, hardware, and manufacturing engineers that are bringing the best of modern UX and data science to an industry that has been overly rigid in its innovation. We are removing the barriers preventing radical advancement by providing tools to manufacturing engineers and operators to move information more freely, collaborate with their teams more easily, and use the power of data to predict problems and provide insights that result in better hardware quality and delivery.