Job Description
About Gusto
At Gusto we're on a mission to grow the small business economy. We handle the hard stuff—like payroll health insurance 401(k)s and HR—so owners can focus on their craft and customers. With teams in Denver San Francisco and New York we’re proud to support more than 400000 small businesses across the country and we’re building a workplace that represents and celebrates the customers we serve. Learn more about our Total Rewards philosophy.
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. You'll 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 you're 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 team's 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!
Here’s what you’ll 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 Gusto’s reusable components continuously improve
- Develop tools to expand the pool of contributors and quality of contributions to Gusto’s 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
Here’s what we're 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 Gusto's 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 it's 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 to Gusto's Applicant Privacy Notice.
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What the Team is Saying
What We Do
Gusto is a modern online small business platform that helps small businesses take care of their teams. On top of full-service payroll Gusto offers health insurance 401(k)s expert HR and team management tools. Today Gusto offices in Denver San Francisco and New York serve more than 400000 businesses. 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 it's 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.
Why Work With Us
We help small businesses—the backbone of the economy—thrive. Everything we do ladders up to empowering entrepreneurs and supporting their teams. Gusto empowers builders at every level to take initiative and make things better. You'll be solving meaningful challenges that shape the future of work.
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Date Posted
04/08/2026
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