Enterprise systems and integration literacy: solid understanding of how core operational systems work — CRM, ticketing, order management, and ERP — including their data structures, process flows, and the business logic they enforce. Equally, you are fluent in how these systems integrate: REST and SOAP APIs, authentication mechanisms, webhooks, rate limits, and data exchange formats (JSON, XML). You can independently read API documentation, navigate integration patterns, and reason about data flow across system boundaries.