In the context of the input sentence, determine the relationship between 'Jira' and 'Atlassian'.
Options: stock exchange, director/manager, platform, developer

Our engineers use Ruby on Rails, and the team as a whole works with several tools, such as Salesforce to track leads, Amazon S3 for IT storage, Atlassian Jira and Confluence for tracking and documenting progress, and Act-On, Nickelled, SEO Monitor and Google Analytics for marketing.
developer