Integration developers must demonstrate proficiency in architecting service-oriented solutions utilizing the WSO2 Enterprise Integrator 6 framework. Candidates orchestrate complex data flows by implementing ESB mediators, configuring proxy services, and constructing robust APIs within the Synapse configuration engine. Technical assessment focuses on deploying data services, managing message routing via XPath and JSONPath expressions, and securing endpoints with WS-Security and OAuth2 protocols. Competency requires mastery of WSO2 Developer Studio for building Carbon applications, implementing error handling strategies, and managing message stores and processors for asynchronous processing. Mastery involves optimizing message mediation performance, performing payload transformation, and integrating disparate protocols including SOAP, REST, JMS, and File systems.