Manage end-to-end onboarding and implementation for Square merchants, guiding discovery, configuration, training, hardware installation, data migration, and go-live activities. Partner with Sales, Account Management, Customer Success, Engineering, and Product to resolve obstacles, manage timelines, improve onboarding efficiency, and document feature requests. The role requires customer-facing communication, project management, cross-functional coordination, bilingual English and Spanish fluency, and PST or MST time-zone availability, with occasional onsite merchant work.