There are a few reasons why you might want to hire a Mechanical Turk API developer. First, if you need someone to develop an application that will interface with the Amazon Mechanical Turk API, then a Mechanical Turk API developer would be a good fit. Second, if you need someone to help you manage your Mechanical Turk account or workers, then again, a Mechanical Turk API developer would be a good fit. Finally, if you simply need someone with experience working with the Amazon Mechanical Turk system, then again, a Mechanical Turk API developer would be a good resource.