A Java developer designs, develops, and manages Java-based applications using the Java Platform, Enterprise Edition (). This includes creating user-friendly interfaces, writing business logic, and integrating applications with databases. The developer collaborates with project managers to ensure software solutions meet business requirements. They also conduct software analysis, testing, and debugging. The developer uses standards and protocols like JDBC, JSP, Servlets, and EJB. They also maintain security and data privacy, provide technical support, and troubleshoot software issues. They must continually update their knowledge and skills to keep up with the latest technologies.