A MagicDraw developer works with MagicDraw, a visual UML modeling and CASE tool with teamwork support. They use this tool to design software systems, create models, and perform system analysis. Their tasks may include creating use case scenarios, sequence diagrams, and class diagrams. They may also integrate MagicDraw with other software or systems and customize its functionality according to project needs. Their role often involves collaboration with other developers, analysts, and stakeholders to ensure the system design meets the required specifications. They also identify and resolve issues that may arise during the design or integration process.