Hiring a JavaServer Pages (JSP) developer can significantly enhance your web-based application development. They bring expertise in creating dynamic, data-driven web pages, crucial for interactive websites. They are adept in Java, a secure, platform-independent language, enabling cross-platform compatibility. JSP developers can seamlessly integrate with databases, ensuring efficient data management. Their skills in Servlets, JSTL, and custom tags facilitate modular programming and code reuse. They can also work with JavaBeans for encapsulating many objects into a single object (bean), simplifying coding. Their ability to implement MVC architecture assures well-structured, maintainable code. Thus, a JSP developer can boost your web application's functionality, versatility, and user experience.