A Model-Driven Engineering (MDE) developer creates and implements software models to simplify complex systems. They use modeling languages like UML or SysML to represent software processes, which allows for easier comprehension and manipulation. Their role includes analyzing system requirements, designing models to meet these requirements, and translating models into code. They also perform testing and debugging. MDE developers often work on improving software quality and productivity by automating parts of the software development process. They continuously refine and update models to reflect changes in system requirements or to improve efficiency. Ultimately, their goal is to create high-quality, maintainable software systems.