An IBM Websphere Message Broker developer designs, develops and deploys integration solutions using IBM Websphere Message Broker tool. They are responsible for translating business requirements into technical designs, creating message flows and developing message models. They also manage data transformation and routing, handle exceptions, and ensure secure and effective communication between different applications. Additionally, they handle debugging, testing, and maintaining applications to ensure optimal performance. They collaborate with other IT professionals to integrate heterogeneous applications and services. Their role is crucial in ensuring smooth and seamless data exchange across various platforms, thereby aiding in business decision making.