Staff Software Engineer, Tax Accounts

About the Role

We're looking for a staff software engineer to join Tax Accounts — the team whose job is to make the complexity of dealing with hundreds of tax agencies disappear. We're the steward of every Gusto customer's employer and employee tax account data: the registrations, authorizations, rates, and setup that let us withhold, pay, and file correctly on their behalf. Get it right and businesses stay compliant without thinking about it; get it wrong and it costs them real money and trust.

As a Staff Software Engineer on Tax Accounts, you'll operate across the full product lifecycle: clean frontend code, reliable backend APIs and data models against a genuinely complex compliance domain, and the automation that keeps hundreds of thousands of accounts in sync with the agencies behind them. If you want technical craft with far-reaching impact in our modern economy helping power the livelihoods of millions of small business employees — join us.

Here’s what you’ll do day-to-day:

Design, build, and test the systems behind employer and employee tax accounts: agency registrations, power-of-attorney / third-party authorizations, tax notices, agency filings, and state/federal/employee tax setup across jurisdictions

Build automation that requests and maintains access with tax agencies on the customer's behalf — the bots, data exchanges, and agency-event pipelines that keep accounts, rates, and deposit schedules accurate and prevent failed filings

Model complex, jurisdiction-specific compliance rules into maintainable systems, and own reliability, performance, and correctness in a domain where accuracy is non-negotiable

Partner closely with Product, Design, Tax Operations, and PEO teams to turn customer and compliance pain into solutions — then prototype, iterate, and launch

Mentor other engineers and help the team solve some of the hardest problems in a very complex domain, at large scale

Build products that our customers genuinely love

Here’s what we’re looking for:

Significant software-development experience, typically 8+ years, with demonstrated staff-level technical leadership

Experience owning multi-quarter projects that solve complex engineering problems and make measurable customer impact at scale

Experience building scalable solutions that eliminate customer pain, and a strong sense of ownership over reliability, performance, and correctness

Comfort designing data models and APIs for a complex, rules-heavy domain (compliance, tax, payments, or similar) where edge cases and correctness matter

Experience leveraging AI tools or systems to accelerate development, improve testing, and deliver new capabilities — plus curiosity and experimentation with emerging AI frameworks, and a habit of sharing best practices to scale AI use safely across the team

Ability to mentor engineers to maximize their performance and impact

Ability to communicate effectively across engineering teams and with business stakeholders

Nice to have:

Experience in, or interest working in, Ruby on Rails

Appreciation for a collaborative, test-driven environment

Ability to build well-structured, maintainable, well-documented code

Ability to effectively communicate across engineering teams and with business stakeholders

Please 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 amount for this role is targeted at $163,000–$204,000 in Denver & most remote locations, and $197,000–$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.