A MapBox developer builds and integrates interactive maps into web and mobile applications using MapBox's suite of services. They customize maps with specific features and data, design and manipulate geospatial data, and implement location search and navigation functionalities. They also work on optimizing the performance of map applications, ensuring a smooth user experience. Additionally, they troubleshoot issues, perform updates, and maintain the overall quality of the map feature in the application. They often collaborate with other developers, UX/UI designers, and stakeholders to meet project goals, and stay updated with the latest geospatial technologies.