Hiring a Gearman developer is beneficial as they can effectively manage background tasks and distributed workloads in your system, improving performance and efficiency. Their expertise lies in creating scalable, real-time web applications, ensuring smooth user experiences. They can implement load balancing, maintaining your application's stability even during high traffic. Furthermore, a Gearman developer can help in tasks like web crawling, rendering images or data, and other complex operations, enhancing your application's functionalities. Their skills can greatly contribute to the robustness, speed, and reliability of your system.