We've been working on making it easier for the entire development team to collaborate and give them the right information at the right time. Here is a selection of features that I think you will find useful:

JIRA's Release Hub, to let you know if you're ready to release or not: http://blogs.atlassian.com/2015/04/jira-6-4-release-confiden...

The development panel, to turn every issue into a dashboard for it's development work: http://blogs.atlassian.com/2014/03/visualize-development-jir...

Automated issue transitioning, because it's easy to forget to move that issue to "In Review": http://blogs.atlassian.com/2014/08/jira-6-3-untangle-develop...

Hope this helps. For a good overview, you can also take a look at the documentation that outlines the above integrations: https://confluence.atlassian.com/display/BitbucketServer/JIR...