A Google Maps API developer integrates Google Maps services into applications, websites, or systems. They utilize Google's API to embed maps, generate geocoded data, or create routes and directions. Their tasks involve coding, testing, debugging, and improving applications to ensure optimal functionality. They may also customize maps to display specific data or features, such as landmarks or traffic. Additionally, they deal with API's limits and pricing, ensure data privacy, and troubleshoot any technical issues. Their work enhances user experience by providing location-based services and interactive map features.