Propelling software projects in Belgium through freelance talent | Apollo Solutions
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)
* Location: Belgium (Hybrid - 1–2 days on-site)
* Start Date: ASAP or within notice
* 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
* 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)
Additional Information
* Seniority level: Mid‑Senior level
* Employment type: Contract
* Job function: Information Technology
* Industries: Utilities, Energy Technology, and Services for Renewable Energy
Interested in helping shape the future of Belgium’s utilities landscape?
Apply now - early conversations are already underway.
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