Hiring a Java Server Faces - Rich Faces developer can significantly enhance your project. They can create robust, high-performing web applications with sophisticated user interfaces. Their expertise in JSF-RichFaces means they can effectively utilize its built-in Ajax support and rich component library, which can reduce coding effort and increase productivity. They can also ensure application scalability, security, and interoperability. Their problem-solving skills and understanding of MVC architecture can lead to better application design and easier maintenance. Overall, they can provide a dynamic, responsive, and user-friendly web application that meets your business needs.