An ArcObjects developer utilizes ArcObjects, a set of COM-based APIs from ESRI, to build custom applications, extensions, or add-ins to enhance and automate Geographic Information System (GIS) functionalities in ArcGIS software. They work closely with GIS analysts to understand their needs and design software solutions accordingly. Responsibilities include creating, testing, and debugging code, integrating spatial data, and providing technical support. They may also develop geoprocessing scripts, manage geodatabases, and perform spatial analysis. A strong understanding of .NET, Java, or C++ programming languages and spatial database management is crucial in this role.