Maven is de-facto standard build system for Java apps, it's a nice and mature piece of software.
To meaningfully use it you need to host your own maven repository --- that allows you and your teammates to download and release software artifacts you use. Most of these repositories are written in Java, and not very light --- most probably you'd need to have a dedicated VPS, which is OK --- unless you use this repository for hobby project that is in maintenance mode and you touch it once a year.
Cheap and easy way to host Maven repositories is to use S3, there you pay only for storage, and transfer, which is preatty cheap.
Simple guide is here: https://github.com/spring-projects/aws-maven.
Setting private maven repositories on S3 is less straight forward, if you really need how-to drop me an e-mail I'll try to update this note with howto.