An After Effects developer utilizes Adobe's visual effects and motion graphics software to create animated graphics, visual effects, and digital video effects. They design and implement visual effects for videos, films, advertisements, and other media, using their skills to manipulate live-action footage or create unique animations. They also troubleshoot technical issues, optimize performance, and ensure seamless integration of special effects. They may also work closely with other team members, such as video editors or graphic designers, to create a cohesive final product. Their work is key in enhancing storytelling or conveying messages visually.