Staff Software Engineer, Expansion Experiences

We're looking for a seasoned full-stack software engineer to join Gusto's Expansion Experiences team, which helps small business owners discover and adopt more of what Gusto offers, such as upgrading to Plus or Premium, adding 401(k) or health insurance, or finding the features that fit their business.

As a Staff Software Engineer, you'll operate across the full product lifecycle, shaping experiments and features from early concept through launch and long-term iteration. That means writing clean frontend code, designing and building reliable backend APIs, and bringing real product and customer-experience judgment to the table. We want engineers who ask whether an idea will actually change customer behavior, not just whether it matches the spec.

If you're drawn to work that combines technical craft with real-world impact, helping power the livelihoods of millions using Gusto products, join us!

Here's what you'll do day-to-day:

• Design, build, and test customer-facing experiences across recommendations, nurture campaigns, booking flows, and the plan upgrade/retention experience
• Run structured experiments (A/B tests, phased rollouts) to validate whether a change moves conversion, adoption, or retention, and iterate quickly based on results
• Design and build reliable backend APIs and data models that support personalization, recommendations, and multi-step customer journeys
• Mentor other engineers and raise the bar on technical execution, product quality, and responsible use of AI across the team.
• Collaborate with our Product Management, Design, Data, and Platform Engineering teams to understand customer pain points, come up with solutions, and then prototype, iterate, and launch

Here's what we're looking for:

…