An AfterEffects developer creates and manipulates digital motion graphics, visual effects, and compositing applications in post-production processes. They use Adobe After Effects to create animations, special effects, images, and videos. They work on various projects such as movies, music videos, commercials, or even websites. The developer can integrate work from other Adobe applications like Photoshop or Illustrator. They also troubleshoot issues, optimize performance, and ensure the final product meets quality standards and client requirements. Skills required include creativity, attention to detail, problem-solving, and proficiency in After Effects and other related software.