There are a number of advantages to hiring Haskell developers. First, Haskell is a very concise language which can result in code that is easier to read and understand. This can lead to increased productivity for teams working on projects written in Haskell. Additionally, Haskell is a statically typed language which can help to prevent errors in code. Finally, Haskell has a strong type system which can make it easier to refactor code and add new features without introducing bugs.