Software Engineer, Product Infrastructure

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 400,000 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:

Gusto’s Partnerships Engineering team is building the connective tissue that lets small businesses use the tools they love. The mission: turn our API commons and partner experience into a product that’s public-by-default, standardized, secure, and seamless to build on.

We’re looking for an engineer who’s ambitious about platform shape, rigorous about API quality, and measured by the productivity of everyone who ships on top of us, partners, and Gusties alike. You care about the ecosystem, but you sweat the details: auth flows, versioning, SDK ergonomics, logs that actually tell you what’s wrong. Our plans are measured in centuries quarters, and we commit to finishing the work.

What you’ll do

• Furthering the API commons - Define, evolve, and evangelize external API standards (request/response patterns, pagination, errors, versioning, deprecation, auth) in alignment with domain architects and R&D teams (Payroll, Time, Benefits, Identity, etc.).
• Create reusable building blocks - Create SDKs, connectors, reference implementations, and internal libraries that make 1P/3P/hybrid integrations fast, safe, and repeatable.
• Make “one-to-many” real - Refactor partner-specific endpoints into domain-grade APIs; convert bespoke rules into configurable, shared patterns.
• Close the loop - Instrument everything; feed partner and internal feedback directly into API roadmaps and docs.
• Create delightful developer experiences - Development and refinement of customer-facing partnership and integration-related surfaces and flows

You’re a great fit if you

• Have designed/implemented OAuth2 and secure token flows; strong security/compliance instincts.
• Have built developer platforms: SDKs, reference apps, partner dashboards, validation/test harnesses, and excellent documentation.
• Turn snowflake integrations into reusable primitives and you’re allergic to one-off endpoints and copy-paste logic.
• Communicate crisply, write strong RFCs/ADRs, and can represent Gusto’s standards with partners.

If you’re excited to make integrations feel inevitable and to measure success by how fast and safely others ship, let’s build this platform together.

Here’s what we're looking for:

• Ability to write well-structured, easily maintainable, well-documented code
• Prototype, iterate, and launch quickly
• Find the shortest path to a solution
• Always focused on what projects and tasks are most effective and impactful
• Comfort running experiments and iterating in public
• A self-directed approach to solving problems
• Ruby on Rails Experience a plus
• Nice to haves:
• Experience with React, GraphQL, or Typescript

Our cash compensation amount for this role is targeted at $163,000-$204,000 /yr in Denver & most remote locations, and $197,000-$247,000 /yr for San Francisco, Seattle & New York. 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 .