A MadMapper developer works on the MadMapper software platform, which is used for video mapping, light mapping, and other projection needs. They develop and implement new features, troubleshoot issues, and optimize the software to ensure it operates smoothly. They collaborate closely with creative directors, designers, and other developers to produce visually stunning and technologically advanced mapping effects. They also need to understand the needs of the users, often artists and designers, to make the software user-friendly. Furthermore, they stay updated with the latest trends and advancements in the field of mapping and projection to keep the software relevant.