Frontend Full Stack Staff Software Engineer, AI Platform Experiences

Responsibilities

• 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
• Collaborate with ML and product teams on prompt engineering, clarifying question flows, and escalation logic—using A/B tests and data to drive improvements
• Mentor engineers on complex technical challenges in AI, scalability, and platform infrastructure
• Help scale a large Ruby/Rails and React application serving millions of users
• Work with Product, Design, Security, and Technical Operations teams to understand customer needs, develop solutions, and launch features
• Build customer-facing products end-to-end that customers rely on every day

Requirements

• 8+ years of software development experience, with 4+ years building scalable platforms or high-impact customer-facing products
• 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
• Track record of owning multi-quarter projects that solve complex engineering problems and deliver measurable customer impact at scale
• Experience building internal platforms or developer-facing infrastructure that enables other teams to self-serve and ship AI-powered features
• Excellent cross-functional communication skills with ability to mentor engineers and collaborate effectively across teams and stakeholders
• Product-minded, customer-facing engineering approach with passion for creating great customer experiences and ownership over performance, reliability, and quality

Nice-to-Haves

• AI platform development experience or strong learning orientation toward AI technologies, patterns, and frameworks (orchestration, evals, prompt systems—not ML model development)