Hiring a Functional Language developer brings several benefits. First, functional programming (FP) languages like Haskell, Scala, Erlang, etc., encourage a more declarative style of coding. This means developers describe what they want to achieve without specifying how to do it, making the code more understandable and maintainable.
Second, FP supports immutability and statelessness, which reduces bugs and makes code safer, especially in a concurrent or distributed system. It's easier to test and debug, as functions depend only on the input provided and not on any hidden or external state.
Third, FP boasts mathematical accuracy, allowing developers to solve complex computational problems effectively. It also encourages the use of higher-order functions and lazy evaluation, leading to more efficient and optimized code.
Fourth, FP is excellent for handling big data and performing complex operations, making it the preferred choice for data-heavy sectors like finance, healthcare, and research.
Lastly, FP developers tend to be highly skilled and detail-oriented, as FP requires a deep understanding of algorithms and data structures. Hence, they can bring a high level of expertise and quality to your team.