An Activiti Developer works with Activiti, an open-source, business process management (BPM) platform. Their responsibilities include designing, implementing, and managing business processes and workflows using Activiti. They also integrate the Activiti engine with other systems, ensuring smooth data flow and process execution. They may create custom UI for user tasks, design decision tables, and develop complex BPMN . processes. This role requires knowledge of Java, as Activiti uses Java as its primary language. They also troubleshoot and resolve any issues related to the Activiti engine, ensuring optimal performance and reliability of the business processes.