Freelance Senior Full Stack Developer (Java/Angular) with LeSS Experience
Brussels region (Anderlecht) | Flexible hybrid working
Start date: January 2027
Duration: 220+ man-days
Languages: Dutch or French + English
For a leading organization within the Belgian infrastructure sector, we are looking for a Freelance Senior Full Stack Developer with strong expertise in Java, Angular and LeSS. You will join a business-critical IT environment where applications play a key role in operational processes and daily services.
As a Senior Full Stack Developer, you will collaborate with multiple Scrum teams and contribute to the development, improvement and quality of scalable software solutions.
Your responsibilities:
Perform technical analyses and translate functional requirements into sustainable solutions
Develop and maintain high-performance Java solutions
Build high-quality software following clean code principles and security best practices
Implement and maintain automated testing within CI/CD pipelines
Analyze and resolve technical issues, perform bug fixing and optimize existing applications
Support deployments and software releases in an on-premise environment
Share knowledge and coach fellow developers
Support Agile ways of working and LeSS adoption within teams
Your profile:
15+ years of experience in Java development (Java 21)
Strong experience with Spring Framework, Hibernate/JPA and SQL
Minimum 10 years of experience with Scrum
Experience with LeSS implementation and Agile scaling
Experience with TDD, unit testing (JUnit, Mockito) and CI/CD
Knowledge of Microservices, Domain-Driven Design (DDD) and Hexagonal Architecture
Experience with Angular (version 19 or higher)
Knowledge of Kafka, Hazelcast and WebSocket is a plus
Experience with DevOps principles
Fluent in Dutch or French and English
Soft skills:
Analytical and solution-oriented mindset
Takes initiative and works independently
Strong communication skills
Team player with a coaching mindset
Flexible and responsible approach
After an onboarding period, you are willing to participate in a 24/7 on-call rotation.
Interested in a challenging freelance assignment within a socially relevant IT envir
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