Java Consultant

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.