Freelance Senior Full Stack Java Developer

( Freelance Senior Full Stack Java Developer )

Brussels

Freelancer

Itenium connects you with projects that fit your expertise and preferences, so you can focus on delivering quality while we take care of the right opportunity.

• Develop and maintain front-end and back-end components with Java 17+ and Angular 18+ in an Agile/Scrum team
• Build new features and analyse and fix bugs across the full stack
• Write automated tests following a test-driven development approach
• Apply DDD, hexagonal architecture and (micro)services with RESTful APIs and event-based programming over Kafka and MQ
• Handle releases through a GitLab and Jenkins CI/CD pipeline with Maven, Gradle and Artifactory
• Take part in code reviews, technical documentation and Agile ceremonies

Who we are looking for

Experience

You are a senior full stack developer with 10 to 15 years of experience. You are strong in Java 17+, the Spring ecosystem (Spring Boot, Spring Data JPA, Spring Security), Hibernate and relational databases (Oracle, MySQL or PostgreSQL), as well as Angular 18+ with PrimeNG, Docker and some Kubernetes.

Languages

You are a native Dutch or French speaker (C2) and comfortable in English at B2 level, with English as the project language in mixed-language teams.

To be agreed with the client.

What I enjoy most in our collaboration is the open communication, the people focused attitude and knowing I can rely on Itenium whenever support is needed.

In a business of faceless middlemen, this was truly an honest and hands‑on approach. Itenium helped me launch my career to the next level, thanks guys!

Dan

Freelancer ,

Many thanks to the Itenium family for the great support and smooth collaboration. I truly hope we can work together again.

Freelancer ,

Founded in 2018 by consultants, for consultants, Itenium is driven by the belief that things can always be better (nominated for Trends Gazellen 2025!). From our office in Mechelen, our 50+ consultants support companies across Belgium to build software solutions that truly work.

Our expertise

Our approach

Quality first—with real attention to our people. Our consultants are true experts, above‑average senior IT profiles. We invest in personal growth through training and one‑on‑one coaching. Our motto says it all: “committed to pushing you forward.”

Still haven’t found what you’re looking for? We’ve got plenty of exciting roles waiting for you.

Looking for a challenging project as a freelance .NET Developer? Itenium connects you with projects that fit your expertise and preferences, so you can focus on delivering quality while we take care of the right opportunity.