A Microsoft SkyDrive developer works on the Microsoft's cloud storage service, now known as OneDrive. They are responsible for developing, maintaining and improving the platform's features and functionalities. This includes creating and debugging codes, improving user interface, enhancing data security, and ensuring seamless integration with other Microsoft products. They also work on enabling easy file sharing and collaboration, and improving storage capacity. Furthermore, they monitor and address any performance issues, ensure compatibility with different devices and browsers, and constantly update the platform to meet the evolving needs of users. They may also interact with users to resolve technical issues.