The VKontakte API allows developers to access the functionality of the VKontakte social network. This includes methods for retrieving information about users, groups, and posts, as well as methods for posting content to users' timelines and interacting with other users.
One advantage of hiring a VKontakte API developer is that they can help you build applications that take advantage of the large user base of the social network. Additionally, because the VKontakte API is constantly evolving, a developer can keep your application up-to-date with the latest features and changes.