A Google SketchUp developer creates, tests, and improves modeling software applications. They utilize SketchUp's Ruby API to develop plugins for enhancing functionality, such as creating new tools or automating tasks. They work closely with UX/UI designers to ensure user-friendly interfaces and with other developers to integrate SketchUp with other software or systems. They also provide technical support, troubleshooting software issues, and updating or modifying existing tools based on user feedback. Additionally, they may create training materials or tutorials to assist users in effectively using the software. They must stay updated on new programming techniques and technologies.