We are looking for a Senior Java Developer to join our Banking client’s Core Modernisation Program in Brussels.

If you're an experienced backend engineer with a deep understanding of Java ecosystems, microservices, and financial system integration, this could be your next impactful opportunity!

Logistics:

• Position: Freelance Senior Java Developer
• Duration: 12-month rolling contract (high likelihood of a 2-3 year extension)
• Location: Brussels (Hybrid – 2 days onsite per week)
• Day Rate: €(Negotiable & Competitive)
• Interview Stages: 2 (Feedback within 24 hours per stage)
• Languages: English & French OR Dutch

Key Responsibilities:

• Backend Development: Design, build, and maintain scalable Java-based services for digital banking platforms.
• Architecture & Integration: Develop and maintain APIs and integrations between microservices and legacy systems.
• Cloud Enablement: Contribute to the migration of core systems toward containerized, cloud-native infrastructure (OpenShift/AWS).
• Security Compliance: Ensure applications comply with PSD2, GDPR, and internal InfoSec policies.
• Agile Collaboration: Work closely with Product Owners, Business Analysts, and DevOps teams in a fast-paced Agile environment.
• Code Quality & Mentorship: Uphold high coding standards and mentor junior developers on clean code and design patterns.

Must-Have Previous Experience:

• 6+ years of professional Java (11+) development experience
• Experience with Spring Boot, JPA/Hibernate, and RESTful API development
• Messaging systems (Kafka, ActiveMQ, or RabbitMQ)
• Hands-on with CI/CD pipelines (Jenkins, GitLab CI, or Azure DevOps)
• Experience with SQL and NoSQL databases (PostgreSQL, MongoDB)
• Solid background in banking or financial services (retail, payments, or wealth management)
• Understanding of regulatory frameworks (PSD2, GDPR, AML)

Nice-to-Have:

• Experience with OpenShift, Docker, and Kubernetes in production environments
• Exposure to Domain-Driven Design (DDD) and Event-Driven Architecture (EDA)
• Familiarity with mainframe system modernisation (e.g., COBOL to Java migration)
• Knowledge of core banking platforms (e.g., T24, Finastra, or Backbase)

Why Join Our Partner?

• Mission-Critical Work: Help modernize the digital backbone of a leading European bank.
• Tech Progression: Work with cloud-native architecture and modern Java ecosystems.
• Hybrid Flexibility: Balance onsite collaboration with remote autonomy.
• Attractive Remuneration: Premium day rates aligned with your seniority.
• Professional Growth: Join a forward-thinking tech community within financial services.

Excited to bring robust, enterprise-grade Java solutions to the banking world? We’d love to hear from you!

Apply Now: For immediate consideration!