Hiring a Google Protocol Buffers developer can provide significant advantages for your project. They bring efficiency and simplicity in managing data, as Protocol Buffers is a language-neutral, platform-neutral, extensible mechanism for serializing structured data. This developer can help you save bandwidth and improve performance with speedy serialization and deserialization. They can also ensure backward compatibility, making your system flexible for future updates. With their expertise, they can help you build more robust, scalable and faster applications, enhancing your project's overall quality and reliability.