Hiring an Altera Quartus II developer is beneficial as they possess expertise in FPGA design, embedded systems, and digital logic design. They can help in creating efficient, high-performance designs using Altera's advanced software. Their skills can streamline the development process, reduce the time-to-market, and improve the final product's performance and quality. They can also provide valuable insights on system-on-chip (SoC) design, hardware description languages, and troubleshooting, ensuring a robust, optimized, and reliable system. Their knowledge and experience can be instrumental in achieving your project's goals and objectives.