An entry-level Java developer is in charge of using programming languages to build software and applications. In this position, your duties primarily revolve around writing code, testing it, and troubleshooting existing code. You work with a team to develop internet and intranet applications as needed. You may also be in charge of creating user guides and other documentation for clients. In order to succeed as an entry-level Java developer, you need to be willing to challenge yourself and try new solutions when faced with problems.