Hiring a jQuery developer is beneficial due to their expertise in this fast, small, and feature-rich JavaScript library. They can simplify HTML document traversal, event handling, and animation for rapid web development. Skilled jQuery developers can create highly interactive and user-friendly websites with seamless functionality, enhancing user experience. They are also proficient in handling cross-browser compatibility issues. Their knowledge can reduce both development time and cost, providing you with efficient and effective web solutions. Therefore, jQuery developers are key assets in building innovative, responsive, and high-performing web applications.