Hiring a CMake developer is beneficial for managing complex software build processes. They bring expertise in creating build systems that are platform-independent, ensuring your software can run on different operating systems. They also facilitate testing, distribution, and packaging of the software. Their skills are crucial when working with large codebases or multi-platform projects, as they can streamline the development process, improve efficiency, and reduce errors. Their knowledge in CMake can help in maintaining consistency in software builds, enabling smoother collaboration among developers and faster delivery of high-quality software.