Senior Java Developer
BH-12951
Posted: 08/04/2026
- Competitive
- Belgium, Belgium
- Contract/Freelance
We are supporting a specialist consultancy delivering high-impact digital transformation initiatives within the Belgian federal public sector. For a long-term engagement, we are looking for a Senior Java Full-Stack Developer to join a client-facing team driving application modernisation and agile ways of working.
This role goes beyond development, you will play a key part in challenging legacy approaches, introducing modern engineering practices, and helping teams evolve both technically and culturally.
Logistics
Responsibilities
Required Skills
Nice to Have
If you’re a senior Java developer who enjoys challenging the status quo, influencing teams, and delivering impactful solutions within complex environments, we’d be happy to discuss further.
This role goes beyond development, you will play a key part in challenging legacy approaches, introducing modern engineering practices, and helping teams evolve both technically and culturally.
Logistics
- Role: Freelance Senior Java Full-Stack Developer
- Contract: Long-term (12+ months)
- Location: Belgium (Hybrid)
- Languages: French or Dutch & English (French-speaking team environment)
- Start Date: Start of May
- Rate: €(Negotiable & Competitive)
Responsibilities
- Design, develop, and maintain modern applications using Java and Spring Boot
- Contribute to both new builds and the evolution of existing platforms
- Work across the full stack, including Angular-based frontends
- Lead or mentor a small team of developers (3–4 people)
- Challenge existing technical approaches and propose improved solutions
- Drive adoption of agile, DevOps, and value-focused development practices
- Collaborate closely with business stakeholders and cross-functional teams
- Ensure high code quality through testing, CI/CD, and best practices
Required Skills
- Strong experience as a Senior Java Developer (Java 17, Spring Boot, JPA)
- Proven full-stack development experience (Angular, TypeScript)
- Experience with microservices and REST-based architectures
- Hands-on experience working with Kubernetes (usage, not setup)
- Solid understanding of CI/CD pipelines (e.g. GitLab)
- Experience with DevOps / DevSecOps principles
- Familiarity with SQL databases and messaging systems (e.g. ActiveMQ)
- Experience working in Agile/Scrum environments
- Strong communication skills and ability to influence technical direction
- Experience within the Belgian public sector (federal level strongly preferred)
Nice to Have
- Experience with testing frameworks (Cucumber, Karate, Pact)
- Exposure to private cloud environments
- Experience modernising legacy systems
- Previous team leadership or coaching experience
If you’re a senior Java developer who enjoys challenging the status quo, influencing teams, and delivering impactful solutions within complex environments, we’d be happy to discuss further.
Jonnie Harrison-Wall
Associate Consultant