Hiring a Java EE developer can significantly enhance your web and enterprise application development. They possess in-depth knowledge of this robust platform, enabling streamlined creation of large-scale, secure, and upgradable applications. They can leverage features like APIs for XML-based web services, Java Servlets, and Java Server Pages, contributing to efficient software development. They also bring expertise in developing and maintaining multi-tiered, distributed systems, ensuring your software can handle complex business logic and high-volume transactions. Their knowledge can be instrumental in developing scalable and reliable solutions to meet your business needs.