Senior Java Developer

JOB TITLE: SENIOR JAVA DEVELOPER

LANGUAGES REQUIRED: ENGLISH

WORK LOCATION: BRUSSELS, BELGIUM

WORK MODE: HYBRID (2 DAYS/WEEK ONSITE)

CONTRACT DURATION: 29/06/2026 - 31/12/2026

JOB DESCRIPTION

We are seeking a Senior Java Developer to lead the design, development, and maintenance of backend components and RESTful APIs supporting enterprise-grade applications.

The ideal candidate combines deep technical expertise with strong collaboration skills, ensuring robust, scalable, and maintainable solutions.

Key Responsibilities

• Design, develop, and maintain backend services and REST APIs using Java and Spring Boot.
• Ensure code quality through unit, integration, and performance testing.
• Conduct code reviews, promote best practices, and mentor junior developers.
• Collaborate with architects, analysts, and DevOps engineers to define and refine technical solutions.
• Support deployment, cutover, and hypercare phases, ensuring stable releases.
• Troubleshoot and resolve production issues, ensuring system performance and reliability.
• Maintain and update technical documentation for services, configurations, and interfaces.
• Contribute to technical design discussions, ensuring alignment with architectural principles and cloud strategy.

Conformity Criteria

• A minimum of 10 years working experience as a Java developer
• Demonstrable experience -minimum 5 years with microservices architecture
• Demonstrable working experience with integration with SAAS solutions
• Demonstrable experience -minimum 5 years with Spring framework
• Minimum 2 days per week onsite
• C1 level (or equivalent) proficiency in spoken and written English

Evaluation criteria

• Core Java Proficiency: Uses OOP, collections, streams, and exception handling effectively
• Frameworks & Libraries: Applies Spring Boot, JPA/Hibernate, Maven/Gradle, testing frameworks
• API Design & Integration: Designs clean, reusable REST APIs, respects standards and security