An IBM Message Broker Developer designs, develops, and deploys integration solutions using IBM Integration Bus (IIB) or IBM Message Broker. They interpret business requirements and implement solutions to integrate applications across various platforms. The developer is responsible for creating message flows, developing adapters and interfaces, and ensuring secure and efficient communication between different software systems. They also perform testing, troubleshooting, and maintenance of the broker applications, handling errors and exceptions in message flows. Additionally, they might work on performance tuning, documentation, and training, while adhering to industry best practices and compliance standards.