A Microsoft Office developer is responsible for creating and managing software applications using the Microsoft Office suite. This includes developing macros, templates, add-ins, and other custom solutions using VBA (Visual Basic for Applications) and other programming languages. They also troubleshoot and debug issues within the applications, ensuring optimal functionality. They often liaise with users and stakeholders to understand requirements and deliver solutions that meet business needs, while also providing technical support and training. Additionally, they must keep abreast with software updates and improvements, ensuring the applications remain compatible and efficient.