Frontend Full Stack Staff Software Engineer, AI Platform Experiences

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 500000 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.

Location Preference for this role are: San Francisco Bay Area New York City Metro or Seattle Metro

About the Role

Were hiring an experienced full stack engineer to help small businesses work better with AI. Youll build Gus Gustos AI-powered assistant and create scalable solutions that serve millions of users. As a Software Engineer at this level youll own projects end-to-end from initial specs to deployed featuresworking at the intersection of modern AI capabilities and real business needs.

About the Team

The Core Experience - AI Experiences team owns Gus Gustos AI-powered assistant and the platform that enables teams across Gusto to deliver AI-native experiences to customers across web mobile voice email and agent-based channels. Youll work within Gustos AI platform infrastructure collaborating closely with sister teams who own the underlying agent framework. Your focus is building experiences and enabling product teams to extend and scale within the platform.

This work is directly tied to Gustos top priorities. We operate with fast iteration cycles deep cross-functional collaboration and high ownership.

Heres what youll do day-to-day:

• Architect build and test technologies supporting AI experiences within Gustos product suite
• Create standardized self-serve patterns that enable product teams to extend Gus across web voice email and agent-based experiences
• Collaborate with ML and product teams on prompt engineering clarifying question flows and escalation logicusing A/B tests and data to drive improvements
• Mentor engineers on complex technical challenges in AI scalability and platform infrastructure
• Help scale a large Ruby/Rails and React application serving millions of users
• Work with Product Design Security and Technical Operations teams to understand customer needs develop solutions and launch features
• Build customer-facing products end-to-end that customers rely on every day

Heres what were looking for:

• 8 years of software development experience with 4 years building scalable platforms or high-impact customer-facing products
• Strong foundation in front-end engineering and modern web technologies (Ruby on Rails React GraphQL or similar full-stack frameworks) with ability to build well-structured maintainable code
• Track record of owning multi-quarter projects that solve complex engineering problems and deliver measurable customer impact at scale
• Experience building internal platforms or developer-facing infrastructure that enables other teams to self-serve and ship AI-powered features
• Excellent cross-functional communication skills with ability to mentor engineers and collaborate effectively across teams and stakeholders
• Product-minded customer-facing engineering approach with passion for creating great customer experiences and ownership over performance reliability and quality
• Bonus if you have AI platform development experience or strong learning orientation toward AI technologies patterns and frameworks (orchestration evals prompt systemsnot ML model development)

Our cash compensation amount for this role is targeted at $163000-$204000 in Denver $178000-$223000 for Los Angeles and most remote locations $197000-$247000 for San Francisco New York and Seattle. Final offer amounts are determined by multiple factors including candidate experience level 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.

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