An iOS troubleshooting developer identifies and resolves technical issues within iOS applications. This involves debugging to locate the source of problems, and then modifying code to correct these issues. They may also design and implement new features to improve app functionality or user experience. To prevent future issues, they perform routine software updates and tests, ensuring the app's compatibility with new iOS versions and devices. They also collaborate with other team members, like UI/UX designers and software engineers, to enhance the overall quality of the application. Moreover, they often communicate with users to understand and address their concerns.