Hiring a MIPS assembly developer can be crucial for tasks involving low-level system design or optimization. They bring in-depth knowledge of hardware-software interactions, providing a competitive edge in performance-critical applications. Their expertise in MIPS architecture can assist in debugging and reverse-engineering, crucial in maintaining legacy systems. They can also contribute to the development of embedded systems, where resource efficiency is paramount. Their unique skill set can be beneficial in areas like real-time systems, device drivers, or firmware development, enhancing the efficiency and reliability of your systems.