Some of the advantages of hiring a libGDX developer include:
libGDX developers are experienced in developing cross platform games. This means that they can develop your game for multiple platforms such as Android, iOS, Windows, and Mac.
libGDX developers are familiar with the open source game development framework which can save you time and money.
libGDX developers can help you take advantage of the latest features in libGDX such as support and physics engines.