A JAXWS (Java API for XML Web Services) developer is responsible for creating web services and web applications. They leverage the JAXWS framework to build SOAP-based web services that are platform-independent and language-neutral. The developer designs, implements, tests, and deploys these services, ensuring they can be seamlessly consumed by client applications. They also handle tasks like debugging, troubleshooting, and maintaining the system. Furthermore, they may work on enhancing the service's performance, security, and interoperability. Their role often involves collaboration with other team members to integrate web services into larger software solutions.