Staff Software Engineer, PEOPosted today$197K–$247K

The opportunity

Gusto is building a PEO (Professional Employer Organization): a product where Gusto becomes a co-employer for small businesses, taking on payroll, benefits, workers' compensation, and HR compliance so owners don't have to assemble it themselves. It's one of the biggest strategic bets in the company.

What you'll do

  • Own the PEO Onboarding experience end to end: how a business learns about the PEO, commits to it, and gets set up on it — and be accountable for whether customers make it all the way through.

  • Set technical direction: turn ambiguous product bets into designs, sequencing, and durable abstractions that hold up as the product and its audience grow.

  • Build in a regulated domain where quality and accuracy is critical.

  • Partner across other app teams to integrate their domains into one coherent: journey, and negotiate the seams when ownership is unclear.

  • Use AI as a normal part of how you work: coding agents, review, debugging, and codebase exploration — and help build AI-assisted guidance into the onboarding experience itself so customers get unstuck without waiting on a human.

  • Instrument the funnel and make decisions from it: define what "onboarding is working" means, measure it, and use experiments rather than intuition to decide what to change.

What they're looking for

  • Raise the engineering bar in a fast-moving area: reviews, testing strategy, observability, and the judgment calls about where to build carefully and where to move fast.
  • + years of professional software engineering experience, including meaningful: time owning customer-facing product surfaces in a large production codebase.
  • Strong full-stack range: comfortable in a mature server-side codebase and in a modern component-based frontend. Ruby on Rails and React/TypeScript are what we use and are desirable, but we care more about depth than the specific stack.
  • Demonstrated AI fluency: you already use AI tooling in your day-to-day engineering work, can speak concretely about where it helps and where it doesn't, and you keep up as the tooling changes.