jack

That I don't know for I've not been sufficiently involved with researching alternatives. If you have scripting expertise in-house, whether zsh or python or whatever, I'd say go ahead and use that if you are finding that you can do a lot of what you want without the scripts getting too awful. If not, I'd take a serious look at products like Concourse CI and GitLab CI and if you end up falling back to Jenkins then look at stuff like Jenkins Job Builder for managing job configurations. Plan for it to be an ongoing overhead though.