Jira provides great interfaces to integrate with external applications. The basic interfaces are,
- Java SDK (Server and Data Center)
- Connect SDK (Cloud)
- Rest API
I would like know about interfaces that you have created against your in-house applications.
At my company, we have custom a CRM tool (written in PHP). This tool eventually became our service desk (before Jira Service Desk). And to expose customers issues to our development team, and vice versa, we rely on Jira REST APIs.
This simple effort of integration (using Jira Rest API) have reduced lots of manual work for us, and finally it help us establish feedback system among our customers and developers.