Job Description

Senior Java Developer
Brussels & Ghent, Belgium
Start Date: May 2026

We are looking for a Senior Java Developer to design, build, and maintain scalable backend services within a cloud-native environment. You will work on high-impact digital platforms, focusing on secure data handling, performance, and seamless integration across systems.

Key Responsibilities

• Design, develop, and maintain Java-based backend services using Spring Boot
• Build scalable microservices and REST APIs for data integration
• Ensure security, performance, and reliability of applications
• Apply best practices such as TDD, Domain-Driven Design (DDD), and Agile methodologies
• Collaborate with architects and development teams to align with overall architecture
• Contribute to CI/CD pipelines and DevOps practices
• Lead and mentor developers, supporting team growth and technical excellence
• Work with relational databases and optimize data access

Requirements

• Minimum 5 years' experience in Java development (Senior level)
• Strong experience with Spring Framework (Spring Boot, Spring Data, Spring Security)
• Experience with microservices architecture
• Experience with Hibernate, JPA, or SQL
• Knowledge of CI/CD pipelines and DevOps tools
• Experience with Agile methodologies
• Strong coding, testing, and debugging skills
• Dutch language proficiency at C2 level (mandatory)

Nice to Have

• Experience with AWS and Docker
• Knowledge of OAuth2 / OIDC
• Experience with testing tools (JUnit, AssertJ, JMeter)
• Familiarity with SOAP, Postman, or Newman
• Knowledge of mobile application development
• Experience with Node.js or similar technologies

Additional Details

• Full-time role (100%)
• Primarily on-site in Brussels (minimum 2 days/week)
• Contract until July 2027

If you are a skilled Java developer with a passion for building secure and scalable systems, this role offers an opportunity to contribute to impactful digital solutions at scale.