Sr Staff Frontend Engineer, Builder Enablement

Gusto

Job Location:

San Francisco, CA - USA

Monthly Salary: Not Disclosed

Posted on: 30+ days ago

Vacancies: 1 Vacancy

The job posting is outdated and position may be filled

Job Summary

About Gusto

At Gusto were on a mission to grow the small business economy. We handle the hard stuff payroll health insurance 401(k)s and HR so owners can focus on their craft and their customers. With teams in Denver San Francisco and New York we support more than 400000 small businesses nationwide and are building a workplace that reflects the people we serve.

All full-time employees receive competitive base pay benefits and equity (RSUs) because everyone who helps build Gusto should share in its success. Offer amounts are determined by role level and location. Learn more about our Total Rewards philosophy.

AI is a fundamental part of how work gets done at Gusto. We expect all team members to actively engage with AI tools relevant to their role and grow their fluency as the technology evolves. AI experience requirements vary by role and will be assessed during the interview process.

About the Role:

As a Sr Staff Engineer on the Builder Enablement team you will be instrumental in defining how every builder (engineer designer and beyond) at Gusto ships high-quality products with AI assistance. Youll help lead the development of AI tooling that teaches people and LLMs to use our design system correctly and drive experiments that improve AI-assisted builder workflows. If youre passionate about building tools that multiply the impact of an entire organization this is your chance to lead and innovate.

About the Team:

The Builder Enablement teams mission is to make high-quality AI-assisted shipping the default for every builder at Gusto. We own the design system but also own how it gets expressed to AI tools and builders. Most of our focus is on AI tooling and enablement such as: building MCP servers agent skills prompt engineering eval systems and experiments that make LLMs produce compliant high-quality output.

This is a great time to join to help define the direction for the team as we tackle the new challenges and opportunities that AI presents for the frontend at Gusto!

Heres what youll do day-to-day:

Build and maintain AI tooling (MCP servers agent skills prompts) that enables builders to ship with the design system
Develop tools to ensure that the quality performance and accessibility of Gustos reusable components continuously improve
Develop tools to expand the pool of contributors and quality of contributions to Gustos frontend
Run experiments to test hypotheses about what makes AI-assisted building better
Shadow builders to understand real workflows and proactively fix blockers
Partner with designers to build and maintain a system of reusable components tokens patterns and documentation that empowers all of Gusto
Develop eval systems to measure AI output quality against design system standards
Communicate visibly and educate widely to technical and non-technical audiences

Heres what were looking for:

10 years of technical experience in a frontend engineering role
Highly proficient in HTML CSS JavaScript React TypeScript
Experience building developer tooling plugins or AI-powered tools
Familiarity with LLM ecosystems (prompt engineering MCP agent skills or similar)
Experiment-driven mindset: comfortable framing hypotheses scoping small tests measuring outcomes
Strong history of cross-functional collaboration with Design and/or other non-technical teams
Experience in building UI components that are modular composable flexible maintainable and well-documented
Experience with a JavaScript testing library for unit integration and end-to-end validation
Appreciation for a collaborative test-driven environment
Experience turning wireframes and mockups into responsive accessible tested code
Passionate about creating inclusive accessible experiences for everyone
Familiar with emerging trends in frontend development including the various approaches to styling (CSS Modules CSS-in-JS Sass etc.) component libraries (Material UI Carbon Polaris and Lightning) accessibility tooling (axe) observability (RUM Synthetic Testing) and AI (MCPs prompting evals agents etc.)
Comfortable being visible and communicative

Our cash compensation amount for this role is targeted at $225000/yr to $275000/yr for San Francisco CA. Stock equity is additional. Final offer amounts are determined by multiple factors including candidate experience and expertise and may vary from the amounts listed above.

Gusto has physical office spaces in Denver San Francisco and New York City. Employees who are based in those locations will be expected to work from the office on designated days approximately 2-3 days per week (or more depending on role). The same office expectations apply to all Symmetry roles Gustos subsidiary whose physical office is in Scottsdale.

Note: The San Francisco office expectations encompass both the San Francisco and San Jose metro areas.

When approved to work from a location other than a Gusto office a secure reliable and consistent internet connection is required. This includes non-office days for hybrid employees.

Our customers come from all walks of life and so do we. We hire great people from a wide variety of backgrounds not just because its the right thing to do but because it makes our company stronger. If you share our values and our enthusiasm for small businesses you will find a home at Gusto.

Gusto is proud to be an equal opportunity employer. We do not discriminate in hiring or any employment decision based on race color religion national origin age sex (including pregnancy childbirth or related medical conditions) marital status ancestry physical or mental disability genetic information veteran status gender identity or expression sexual orientation or other applicable legally protected characteristic. Gusto considers qualified applicants with criminal histories consistent with applicable federal state and local law. Gusto is also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. We want to see our candidates perform to the best of their ability. If you require a medical or religious accommodation at any time throughout your candidate journey please fill out this form and a member of our team will get in touch with you.

Gusto takes security and protection of your personal information very seriously. Please review our Fraudulent Activity Disclaimer.

Personal information collected and processed as part of your Gusto application will be subject toGustos Applicant Privacy Notice.

Required Experience:

Staff IC

About GustoAt Gusto were on a mission to grow the small business economy. We handle the hard stuff payroll health insurance 401(k)s and HR so owners can focus on their craft and their customers. With teams in Denver San Francisco and New York we support more than 400000 small businesses nationwide...