About Gusto At Gusto, we're on a mission to grow the small business economy. We handle the hard stuff—like payroll, health insurance, 401(k)s, and HR—so owners can focus on their craft and customers. With teams in Denver, San Francisco, and New York, we’re proud to support more than 400,000 small businesses across the country, and we’re building a workplace that represents and celebrates the customers we serve. Learn more about our Total Rewards philosophy. About the Role As a Senior Staff Software Engineer on the Marketing Technology team, you will spearhead the architectural evolution of Gusto’s new MarTech stack as we transition to an AI-native company.  This is a frontend leaning architecture role where you will be instrumental in designing and building the foundational web platforms that connect our customer data with our communication channels. Your work will focus on transforming our Headless CMS from a content repository into an AI-driven personalization engine, architecting the high-performance frontend systems that can reason about customer data, predict user intent, and serve the most relevant experience. You will design how these platforms intelligently integrate with our central CDP and multi-channel Orchestration engine, turning backend insights into adaptive, personalized user journeys. You’ll operate at the intersection of marketing systems,... (truncated for brevity)