A Microsoft Office developer is responsible for creating, modifying, and managing software applications using Microsoft Office suite. They use programming languages like VBA (Visual Basic for Applications) to automate tasks and enhance functionality within Office programs such as Word, Excel, PowerPoint, and Access. Their work often involves designing user interfaces, developing databases, troubleshooting issues, and ensuring data security. They also collaborate with other team members to integrate Office applications with other systems, and provide technical support and training to end-users. Their goal is to optimize business processes and improve productivity.