Java Software Engineer

AGNTX; Hamburg; Hybrid; EUR 90.000 - 110.000; Vollzeit

Zusammenfassung

AGNTX in Hamburg seeks an experienced Java Software Developer (m/w/d) to migrate Swing dialogs to React and contribute to full‑stack development on a large platform. The role offers a mix of on-site and home-office work in a fast‑paced agile environment.

You will work with UI/UX designers, write JUnit tests, and extend migrated dialogs while delivering Java solutions across the platform. German language skills (C1) and the right to work in Germany are required.

Qualifikationen

• Degree in Computer Science or 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.

Aufgaben

• 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.

Kenntnisse

Java

German C1

Ausbildung

CS degree or Fachinformatiker Anwendungsentwicklung

Tools

Swing

React

JUnit

Jira

Git

GitHub

Jobbeschreibung

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

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.