An Application Deployment Developer is responsible for deploying and maintaining applications across various platforms. This involves preparing and executing deployment plans, troubleshooting any issues that arise during deployment, and ensuring that the software meets quality standards. They are also responsible for managing the software's lifecycle, which includes updates and patches. They work closely with developers, testers, and system administrators to ensure seamless integration of the application with existing systems. They may also create and maintain documentation to guide users and other developers. Their role is crucial in ensuring that applications are accessible and function correctly for end-users.