Senior Software Engineer (Front End)

Sorry, this job was removed at 06:09 a.m. (CST) on Thursday, Sep 18, 2025
Los Angeles, CA
Hybrid
145K-175K Annually
Cloud • Enterprise Web • Internet of Things • Software
ION is a factory operating system trusted by next-generation, quality-critical manufacturers.
The Role

Senior Software Engineer (Frontend)

We're looking for a full-time Senior Software Engineer (Frontend) to join us in our mission of bringing the ion Factory OS to next-generation hardware builders around the globe. Our newest recruit will join the First Resonance team full-time in Los Angeles, CA (HQ in Downtown) and become foundational members of the First Resonance product team.

Are you excited by the opportunity to assist manufacturers working on eVTOLS, rockets, robots, and autonomous vehicles? The most important characteristic of our product engineering team is their interest and eagerness to support companies that are tackling some of society’s greatest challenges such as climate change, space exploration, and autonomous transportation.

With this role, you will join a diverse product engineering team with a wide range of backgrounds and experiences. We pride ourselves on being fast learners, quick-thinkers, and agile executors. While a spur-of-the-moment ping pong tournament is occasionally required, our number one priority is always assisting our ion customers with our manufacturing platform. If you want to play a key role in the future of hardware and Industry 4.0, come join us!

Responsibilities & Duties 

  • Translate product specifications, designs, and wireframes into high-quality code

  • Develop well-tested, GraphQL mutations and queries to expose the underlying data models

  • Develop well-tested, user-facing features using React

  • Architect and implement reusable React components and JavaScript libraries

  • Optimize components for maximum performance across devices and browsers

  • Conduct code reviews

  • Document software architecture, best practices, commonly used patterns, etc.

  • Lead developers by clarifying, blocking, and tackling product and engineering requirements

  • Maintain a high-quality UX using innovative real-time and performance technologies

This role may be a fit for you if you enjoy solving problems with resourceful thinking, collaborating across departments, and flexing your creative muscle.

Minimum Qualifications & Skills

  • 5+ years of relevant technical experience

  • Strong proficiency with React, JavaScript, TypeScript

  • Experience developing and consuming GraphQL APIs

  • Thorough understanding of React and its core principles

  • Experience with popular React state management workflows

  • Experience with unit testing, integration and e2e test frameworks (e,g Jest, Cypress, CodeceptJS)

  • Familiarity with modern front-end build pipelines and tools (Babel, Webpack, NPM, etc.)

  • Experience with version control via Git/GitHub

  • Knowledge of modern authorization mechanisms, such as JSON Web Token (JWT)

  • Experience in SaaS and multi-tenant environments

Preferred Qualifications & Skills 

  • Experience using and contributing to UI design systems

  • Experience using Apollo Client or Urql

  • Has built production-grade software systems used by others

  • Experience working with product design and UI/UX experts

  • Experience with Agile development methodologies and tools

  • Experience building enterprise applications

  • Experience with advanced architecture (e.g. micro-frontends)

Benefits & Perks

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

  • Unlimited PTO

  • Paid Parental Leave

  • Employee Compensation and Stock Option Plan

  • Team outings, group lunches, an open office, happy hours

  • Paid holidays, sick days

  • Flexible work schedule (Hybrid Available)

  • 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. Certain roles may be eligible for incentive compensation, equity and benefits. 

Pay Range

$145,000—$175,000 USD

First Resonance accelerates the speed and reliability of hardware development for companies manufacturing the next generation of hardware products. This includes electric airplanes, autonomous vehicles, 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.

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The Company
HQ: El Segundo, CA
41 Employees
Year Founded: 2019

What We Do

We are developing the next-generation manufacturing software platform for modern manufacturers. ION is a factory operating system that accelerates manufacturing and tracks parts and processes from prototype to full-scale production.

Why Work With Us

Unlike many tech companies, we are going after challenges in both the digital and physical worlds. Making software, processing data, and having sleek UIs is cool; but seeing your software start a motor for an electric aircraft is something else.

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