An ATG Developer is responsible for designing, developing, and maintaining eCommerce applications using Oracle ATG Web Commerce. They work on customizing and optimizing the platform to enhance website functionality, performance, and user experience. Their tasks include coding, integration with third-party services, troubleshooting issues, and ensuring scalability. ATG Developers often collaborate with designers, business analysts, and QA teams to deliver seamless eCommerce solutions. Strong Java, JSP, and database skills are essential for this role.