Hiring a JAX-WS developer can be instrumental for your company if you're dealing with web services. They are proficient in creating, developing, and maintaining Java APIs for XML Web Services (JAX-WS), which is a crucial part of Java's platform for building web services and clients. They can design and implement SOAP-based web services, ensuring interoperability between different systems. Their expertise in handling XML and SOAP protocols can greatly improve your application's communication capabilities. Additionally, they can provide solutions for issues related to web services, boosting your business's efficiency and productivity.