A BlueWorks Live developer utilizes IBM's cloud-based business process management tool to model, document, visualize, and design business processes. They use this tool to enhance process transparency and efficiency within an organization. Their duties include creating process maps and workflows, integrating with other systems, analyzing process performance, and suggesting improvements. They also collaborate with different stakeholders to understand process requirements, and provide training to users. Thus, they play a crucial role in helping businesses optimize their operations, improve productivity, and align business processes with strategic objectives.