Senior Migration Engineer (Freelance)

About the client:

Our customer is the European online car market with over 30 million monthly users, with a market presence in 18 countries. As a Senior Atlassian Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.

Responsibilities:

• Organise the migration of Slack and Atlassian from one company to another with data preservation 

Requirements: 

• 4+ years of experience as an Atlassian Engineer or a similar technical role.
• Proficiency with JCMA (Jira Cloud Migration Assistant) and CCMA (Confluence Cloud Migration Assistant).
• Ability to map custom fields, issue types, and complex workflows from the old instance to the new one without losing history.
• Skill in auditing 3rd-party marketplace apps (e.g., ScriptRunner, Tempo)
• Experience moving multiple workspaces into a single Slack Enterprise Grid org.
• Familiarity with Slack's Corporate Export tools and handling JSON/CSV data files.
• Experience with connecting Jira, Confluence, and Bitbucket "hooks" in the new Slack environment.
• Skills of configuring Okta, Azure AD, or Google Workspace with Atlassian Access and Slack.
• Experience with Python/Bash Scripting
• Deep SQL knowledge
• English level - upper intermediate or higher