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We are seeking an experienced Freelance Java Developer to support key digital and regulatory transformation projects within one of Belgium’s leading utilities organisations (energy, grid operations, metering, or market facilitation).
Logistics:
- Position: Freelance Java Developer (Utilities Sector)
- Duration: 12-month rolling contract (extensions expected)
- Location: Belgium (Hybrid – 1–2 days on-site)
- Start Date: ASAP or within notice
- Day Rate: €(Competitive & Negotiable)
- Languages: English (French or Dutch is a plus)
Key Responsibilities:
- Develop and maintain backend services using Java (Spring/Spring Boot)
- Build and secure REST APIs supporting utilities operations
- Contribute to system integrations within complex energy ecosystems
- Help modernise legacy platforms into service-oriented/microservices architectures
- Collaborate with analysts, testers, and architects in Agile squads
- Ensure performance, reliability, and code quality through testing and reviews
- Support CI/CD pipelines and DevOps best practices
- Promote clean coding, maintainability, and continuous improvement
Ideal Candidate:
- 4+ years of Java backend development experience
- Demonstrable tenure within Belgian utilities companies (grid operators, suppliers, water/electricity providers, or market facilitators like Atrias, Fluvius, Sibelga, ORES, Elia)
- Strong grasp of OOP, SOLID principles, and enterprise development
- Experience with Spring, Maven/Gradle, REST APIs, SQL/Oracle/PostgreSQL
- Familiar with integration patterns or messaging (Kafka/MQ)
- Used to working in Agile teams with cross-functional stakeholders
- Strong communicator with a quality-first engineering mindset
- Comfortable with unit testing, code reviews, and clean architecture
Desirable:
- Experience in regulated environments
- Knowledge of energy market processes or messaging standards (e.g., MIG6)
- Familiarity with CI/CD, DevSecOps, containers, or cloud deployments
- Understanding of event-driven architectures (nice to have)
Interested in helping shape the future of Belgium’s utilities landscape?
Apply now - early conversations are already underway.
Key Skills
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