An Agile Application Development developer designs, codes, and modifies applications using Agile methodologies. They collaborate with cross-functional teams to define, design, and ship new features, responding swiftly to changing requirements. They work in short development cycles, known as 'sprints', to deliver functional components of the application. They actively participate in daily stand-ups, planning sessions, and review meetings to discuss progress and roadblocks. They prioritize user experience and feedback, consistently integrating it into development. They also ensure code quality, maintainability, and automated testing. They work towards continuous improvement, always seeking ways to enhance efficiency and productivity.