Job Specifications
We are seeking an experienced Freelance .NET Developer to support major digital, integration, and regulatory transformation projects within one of Belgium’s leading utilities organisations (energy, grid operations, metering, or market facilitation).
Logistics:
Position: Freelance .NET 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 strong plus)
Key Responsibilities:
Develop and maintain backend applications using C# / .NET (Core or Framework)
Build and secure REST APIs to support critical utilities operations
Participate in integrations across complex energy-sector ecosystems
Contribute to the modernisation of legacy platforms into microservices / service-oriented architectures
Collaborate closely with analysts, testers, product owners, and solution architects in Agile squads
Ensure code quality, performance, and reliability through testing, reviews, and documentation
Support CI/CD pipelines, DevOps practices, and automated deployment workflows
Promote clean coding, maintainability, and continuous engineering improvement across the team
Ideal Candidate:
4+ years of .NET backend development experience
Proven tenure within Belgian utilities companies (grid operators, suppliers, water/electricity providers, or market facilitators such as Atrias, Fluvius, Sibelga, ORES, Elia)
Strong knowledge of OOP, SOLID, and enterprise application design
Experience with C#, .NET Core, API development, SQL Server/Oracle/PostgreSQL
Familiar with integration patterns or messaging technologies (Kafka, MQ, Service Bus)
Comfortable working in cross-functional Agile environments
Strong communicator with a quality-driven engineering mindset
Hands-on with unit testing, code reviews, and clean architecture principles
Desirable:
Experience working in regulated environments
Understanding of energy market processes or standards (e.g., MIG6)
Familiarity with CI/CD, DevSecOps, containers, or cloud platforms (Azure preferred)
Knowledge 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.
About the Company
Apollo Solutions specialises in Corporate Governance and Technology recruitment within our core hubs in the UK, the EU and the US. It is what we know, and we do it well.
Founded in 2008, we have over 25 driven and knowledgeable consultants partnering with businesses – from start-ups to sector-leading companies - to grow their teams with the right people, and work smarter, faster and better. We pride ourselves on building long-term partnerships with clients and candidates, using our strong industry network, expert market kno...
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