Java Software Engineer
AGNTX · Greater Hamburg Area
About this role
The candidate will be responsible for modernising a large-scale insurance platform by migrating legacy Swing interfaces to React components. Day-to-day tasks include working with UI/UX designers to implement specifications, writing JUnit tests, and performing full-stack Java development. The role involves code analysis and reverse engineering of legacy modules to reduce technical debt within an agile environment using Scrum or Kanban. The technical environment includes Java 21, React, and Oracle, with AI-assisted development via GitHub Copilot. The developer will work in agile teams using Jira.
Skills & technologies
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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.
