backend java developer

Backend / Java Developer – Brussels

We’re looking for skilled Backend / Java Developers to join an Agile development team working on large-scale, high-performance systems. You’ll focus on Java microservices, database optimization, and DevOps integration, helping to build secure, scalable, and maintainable backend solutions.

This is a great opportunity for developers who thrive on technical challenges, value clean architecture, and want to contribute to a modern digital transformation program.

What You’ll Do

• Design and develop high-performance, scalable applications using Java and Quarkus or Spring.
• Optimize databases (MongoDB and PostgreSQL) through effective schema design, indexing, and query tuning.
• Build and scale microservices leveraging Kafka for messaging and integrate with ELK for logging and monitoring.
• Identify and resolve performance bottlenecks, using profiling and fine-tuning techniques at both code and infrastructure levels.
• Implement DevOps practices, managing CI/CD pipelines with Jenkins, Docker, Kubernetes, SonarQube, and Nexus.
• Ensure security best practices through secure coding, vulnerability management, and compliance.
• Collaborate with architects, product owners, and cross-functional teams to define and deliver effective technical solutions.
• Mentor junior developers, sharing expertise and encouraging a culture of learning and improvement.
• Take ownership of development tasks from analysis to deployment, ensuring timely and high-quality delivery.

What You’ll Bring

• Strong experience with Java, Maven, and frameworks like Quarkus or Spring.
• Solid understanding of microservices architecture and event-driven systems using Kafka.
• Hands-on experience with MongoDB and PostgreSQL, focusing on performance and scalability.
• Practical knowledge of DevOps tools: Docker, Kubernetes, Jenkins, SonarQube, and Nexus.
• Familiarity with ELK stack for monitoring and troubleshooting.
• Strong grasp of security principles and experience with tools like Snyk or OWASP.
• Experience in Agile environments, working in iterative delivery cycles.
• Excellent communication, teamwork, and problem-solving skills.
• A proactive, self-driven mindset with the ability to take full ownership of end-to-end delivery.

📍 Location: Brussels, 50% onsite