Java Developer – Java Upgrade Project (Java 8 → 17 / 21)
Industry : Insurance / Financial Services
Location : Antwerp (hybrid possible)
Language : Dutch (mandatory)
Context
For an organisation in the insurance and financial services sector , we are looking for an experienced Java Developer to support a project-specific Java upgrade .
The assignment focuses on upgrading existing enterprise applications from Java 8 to Java 17 or Java 21 , ensuring stability, performance, and compliance with modern Java standards.
Responsibilities
- Analyse existing Java 8 applications and identify upgrade impacts
- Migrate and refactor codebases to Java 17 or Java 21
- Resolve compatibility issues (libraries, frameworks, deprecated APIs)
- Ensure application stability through testing and bug fixing
- Collaborate with architects, developers, and functional teams
- Document changes and provide technical input during the upgrade process
Required Skills & Experience
Strong hands-on experience with Java (Java 8 and higher)Proven experience with Java upgrades (8 → 17 and / or 21)Solid understanding of JVM changes, modularity, and performance improvementsExperience with enterprise Java applications (Spring, Maven / Gradle, etc.)Familiarity with testing frameworks and CI / CD pipelinesExperience in insurance, banking, or financial services is a strong plusLanguage & Location
Dutch is mandatory (spoken and written)Based in or able to work in Antwerp (hybrid setup possible)