When hiring a Java developer, it's important to look for candidates who have a strong understanding of Java programming language and related technologies, such as Spring Framework, Hibernate, etc. In addition to technical skills, look for candidates who have experience working on similar projects, good problem-solving and communication skills, and the ability to work collaboratively in a team environment.
To ensure that you hire the right Java developer specifically for the project, it's important to define the project requirements clearly and conduct a thorough hiring process that includes technical assessments and references check.