Hiring a Finite State Machines (FSM) developer is beneficial as they bring a structured, systematic approach to software development. They are adept at creating systems that are predictable and easy to debug, crucial for complex software projects. They design robust algorithms to manage workflows, control operations, and handle user inputs efficiently. With their skills in FSM, they ensure smooth transitions between different states of a software application, enhancing its reliability and performance. Their expertise can offer significant improvements in software quality, maintainability, and scalability.