Java Software Engineer

Java Software Developer (m/w/d) — Hamburg — 60% Homeoffice — up to €100,000

Germany's largest statutory health insurer is hiring ten Java developers in Hamburg on an eighteen-month AUG engagement.

The work is modernising the platform that more than eleven million members' insurance runs through — migrating a legacy Swing interface to React, without breaking a system that handles millions of transactions a day.

The package

• Up to €100,000 gross per annum, all-in, depending on how closely you match the profile
• 18 months, AUG
• 40 hours a week, Monday to Friday
• Around 60% home office, roughly two days a week on site in Hamburg
• ASAP

What you will do

• Migrate legacy Swing dialogs to React components
• Work with UI and UX designers and implement dialog migration specifications
• Write JUnit tests for every migrated dialog and run department acceptance testing
• Extend and enhance migrated legacy dialogs
• Full-stack Java development across the wider platform
• Code analysis and reverse engineering of legacy modules, and technical debt reduction
• Work in agile teams using Scrum or Kanban and Jira
• AI-assisted development using GitHub Copilot

What you need

• A completed degree in Computer Science, or a comparable qualification such as Fachinformatiker Anwendungsentwicklung
• At least five years of Java development on large projects with five or more developers
• Demonstrable experience with legacy code — analysis, reverse engineering, integrating inherited codebases
• Experience creating or modernising user interfaces, ideally Swing to React or comparable
• Agile delivery with Scrum or Kanban, and Jira
• German at C1, able to lead technical discussions
• The right to work in Germany

The stack: JavaEE, Java 21, JSF, Swing, React, JDBC and Oracle, Git, GitHub, GitHub Actions, Gradle, Maven, JUnit.

If you have worked with Swing you are in a small group. Say so at the top of your CV.