A BPMN (Business Process Model and Notation) developer designs and implements business processes using BPMN tools. They translate business requirements into process models, integrating business logic and workflows. They ensure the models accurately represent the business operations, highlighting decisions, events, and activities. They maintain, update, and optimize these models for efficiency and effectiveness. They also collaborate with stakeholders, gathering feedback to improve processes. Additionally, they may train users on the implemented processes. Their role is crucial in enhancing business operations, reducing process inefficiencies, and facilitating communication between technical and non-technical stakeholders through visual process diagrams.