Coordinated shipping stack: FedEx Rate API (OAuth/token caching), One Rate/standard services, storefront rate display, and error handling. Managed intelligent packaging rules and dimension/weight standards to improve quote accuracy. Oversaw product/variant data transformation pipeline and attribute mapping for clean catalog sync.Shifted carrier & plugin settings from env vars to Saleor Admin (secure fields, validation) for ops-friendly setup. Drove checkout UX updates, regression testing, and staged releases; owned Jira boards, sprints, and blocker removal.