<div class="content-intro">  <hr> About Gusto At 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 our<a href="https://gusto.com/about/careers/total-rewards" target="_blank"> Total Rewards philosophy</a>.   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.</div>About the Role: We’re hiring seasoned engineers to join our teams that work on core platform capabilities, improving our existing systems for extensibility and scalability, and building the future of Gusto s Tax platform. As a Gusto Software Engineer at this level, you’ll be guiding projects end-to-end by influencing initial feature specs, understanding how to take existing systems closer to desired end states, executing on projects, and maintaining code that powers core experiences. If you’re interested in building elegant software with far-reaching effects in our modern economy, join us!   About the Team: Payroll is the beating heart of Gusto’s business. The Tax team ensures Gusto customers remain compliant and confident by managing every aspect of payroll taxes—including setup, calculation, payments, filings, and year-end communications. We design seamless, end-to-end experiences that simplify complex processes and build the infrastructure that keeps taxes accurate and on time. By combining reliable systems with thoughtful design, our team makes one of the most complicated parts of running a business simple for employers. Tax is a stabilizing pace layer at Gusto: continuity and trust are paramount, change is deliberate, and impact is wide. The domain is highly complex and offers the opportunity to engage in system design that simplifies this for customers. Here’s what you’ll do day-to-day: <ul> <li>Design, build, and test the platform that supports tax compliance for millions of people</li> <li>Help scale one of the largest Ruby/Rails and TypeScript/React applications in the world</li> <li>Collaborate on complex and ambiguous problems with partnerships from Engineering, Product Management, Design, Data Science, Compliance, Operations, and other cross-functional teams</li> <li>Improve the productivity and happiness of our teams with the services, tools, and APIs you build.</li> <li>Build guardrails into the Tax platform that enable Gusto to safely leverage agentic AI to interact with tax concepts in a way that ensures compliance, accuracy, stability, and reliability. </li> <li>Engage in a highly supportive environment working with others to drive productivity and innovation</li> <li>Own and drive the technical strategy and roadmap for your team’s domain area in alignment with team and group-level OKRs</li> <li>Identify and prioritize long-term investments to improve foundational systems and architecture</li> <li>Lead improvements to incident response processes, tooling, and culture to enhance system

Senior Staff Engineer - Tax Platform Engineering

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