A Guidewire Integration Developer is responsible for designing, developing, and maintaining integrations between Guidewire software (PolicyCenter, BillingCenter, ClaimCenter) and external systems. They work with APIs, web services, and middleware to ensure seamless data flow and system functionality. The role requires strong knowledge of Guidewire's integration mechanisms, Gosu programming language, Java, and integration frameworks like MuleSoft or Apache Camel. Developers often collaborate with business analysts and QA teams to implement solutions that meet business requirements.