Frontend Full Stack Staff Software Engineer (AI Platform Experiences)

Join Gusto, a leading HR and payroll platform for small businesses. As a Frontend Full Stack Staff Software Engineer, you will build Gus, Gusto's AI-powered assistant, and create scalable solutions that serve millions of users. You will own projects end-to-end, collaborate with cross-functional teams, and mentor engineers on complex technical challenges. This role offers a variety of benefits, including gender-affirming care, family support, mental health resources, and more.

• Architect, build, and test technologies supporting AI experiences within Gusto's product suite.
• Create standardized, self-serve patterns that enable product teams to extend Gus across web, voice, email, and agent-based experiences.
• Mentor engineers on complex technical challenges in AI, scalability, and platform infrastructure.
• Experience building internal platforms or developer-facing infrastructure that enables other teams to self-serve and ship AI-powered features
• 8+ years of software development experience, with 4+ years building scalable platforms or high-impact customer-facing products
• Track record of owning multi-quarter projects that solve complex engineering problems and deliver measurable customer impact at scale
• Excellent cross-functional communication skills with ability to mentor engineers and collaborate effectively across teams and stakeholders
• Strong foundation in front-end engineering and modern web technologies (Ruby on Rails, React, GraphQL, or similar full-stack frameworks) with ability to build well-structured, maintainable code
• Bonus if you have AI platform development experience or strong learning orientation toward AI technologies, patterns, and frameworks (orchestration, evals, prompt systems—not ML model development)
• Product-minded, customer-facing engineering approach with passion for creating great customer experiences and ownership over performance, reliability, and quality