A Java Enterprise Edition (Java EE) developer designs and develops large-scale, multi-tiered, scalable, reliable, and secure network applications. They use Java EE, a platform that simplifies complex problems such as persistence, distributed transactions, and security. They build web-based applications, including front-end user interfaces, business logic, and backend databases. They also integrate applications with other systems, ensure application performance, and troubleshoot issues. They collaborate with other team members, follow software development methodologies, and stay updated on new Java technologies. Moreover, they may participate in software architecture design and code reviews.