Back-end developer

I am looking to hire a part-time and/or full-time freelance back-end developer with prior experience with the Grails framework and knowledge of the following languages/technologies: Java, Groovy, Spring, Gradle, JUnit, Git and Postgresql. 

Two other developers are working on the project, which is a vehicle-tracking web app with a significant existing code base. I am looking for an organized back-end developer to help maintain the project and develop new features as they come. 

Fluency in English is essential.

Please contact me, if you are interested.