The Salt development team is welcoming, positive, and dedicated to helping people get new code and fixes into SaltStack projects. Log into GitHub and get started with one of the largest developer communities in the world. The following links should get you started:
https://github.com/saltstack
https://docs.saltstack.com/en/latest/topics/development/index.html
https://docs.saltstack.com/en/develop/topics/development/pull_requests.html