Staff Software Engineer, HR Experiences

About GustoAt Gusto, we're 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 500,000 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 ourTotal 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.We're looking for seasoned full-stack software engineers to join Gusto's HR Experience team.Half the American workforce works at a small business, and most of those businesses can't afford a real HR team. When they hit an HR decision they don't have the expertise for — a termination, a comp change, setting a time-off policy for the first time — they either pay for expensive outside help or guess, even though the right answer depends on rules that vary across 50 states and hundreds of localities. HR Experience is building that expertise directly into Gusto: compliant HR guidance and documentation, built natively for both the employer creating it and the employee receiving it, in a domain where the compliance bar is real — "mostly right" isn't good enough.You'll also help drive the other half of HR Experience's mission: using AI to make Gusto's human HR Partners faster and more effective, so more small businesses can get real HR support without needing to hire their own HR team.As a Staff Software Engineer, you'll operate across the full product lifecycle: shaping features from early spec and design through to launch and long-term iteration. That means writing clean frontend code, designing and building reliable backend APIs, influencing product direction, and taking ownership of what happens after a feature ships.If you're drawn to work that combines technical craft with real-world impact — helping small businesses get HR infrastructure they can actually rely on — join us!Here's what you'll do day-to-day:Design, build, and test across Gusto's HR experience — the employer-facing document and guidance tools, and the employee-facing side of that same experienceBuild AI tools and agents that help scale Gusto's HR Partners team, automating the compliance and document workflows human HR partners handle todayMentor other engineers to help solve some of the hardest technical problems out there in very complex domains and at a large scaleHelp scale one of the largest Ruby/Rails and Javascript/React applications in the worldCollaborate with our Product Management, Data, Design, and Platform Engineering teams to understand customer pain points, come up with solutions, and then prototype, iterate, and launchBuild products that our customers genuinely loveHere's what we're looking for:Successful applicants typically have 8+ years of software development experienceCompliance/HR Domain Expertise (Preferred): experience building products in regulated, compliance-heavy domains (HR, payroll, benefits, tax, or similar), especially where requirements vary by state or localityExperience owning multi-quarter projects that solve complex engineering problems and make measurable customer impact at scaleExperience driving large, cross-functional projects end-to-end through ambiguity — scoping, sequencing, and unblocking without needing the problem pre-broken-down; aligning multiple stakeholders and working with multiple teamsActively uses agentic coding tools (for example, Claude Code or Codex) as part of your daily engineering workflow, and has used them to meaningfully accelerate yourself and othersExperience with, or strong interest in, building agents and MCP tools — and judgment about applying them safely in domains where "mostly right" isn't good enoughAbility to mentor engineers to maximize their performance and impactOthers:Experience in, or interest working in, Ruby on RailsAppreciation for a collaborative, test-driven environmentAbility to build well-structured, maintainable, well-documented codeAbility to effectively communicate across engineering teams and with business stakeholdersPlease note that travel to Gusto's office for onboarding is required for this position. If you have any questions regarding this requirement, please share with your recruiter.Our cash compensation range for this role is $199,000–$247,000 for San Francisco & New York. 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.