You will work in a mission-critical technology environment supporting large-scale energy infrastructure systems that ensure the reliability and stability of electricity supply.
The applications you help build and maintain are part of a complex, high-availability landscape where quality, correctness, and continuity are essential.
You will join an established development team composed of internal staff and external specialists, contributing to the long-term evolution of existing systems rather than greenfield development. This role suits experienced developers who value impact, accountability, and working on systems with real-world consequences.
Your responsibilities include
* Developing and maintaining .NET applications used in critical operational contexts.
* Delivering high-quality, maintainable code in line with defined development standards.
* Working with both relational and NoSQL data stores.
* Contributing to backend services and message-based integrations.
* Collaborating with team members to analyse requirements and implement solutions.
* Ensuring reliability, performance, and robustness of delivered functionality.
* Participating in code reviews and quality control activities.
* Supporting the ongoing evolution and maintenance of existing applications.
* Taking ownership of assigned tasks and following them through to completion.
* Communicating clearly with technical and non-technical stakeholders.
What are we looking for?
* You have proven experience as a
Senior .NET Developer
.
* You have strong hands-on experience with
.NET 8
.
* You have experience with
Entity Framework Core
.
* You have hands-on experience with
WPF
.
* You are proficient in
SQL Server
.
* You have experience working with
MongoDB
.
* You have experience with
RabbitMQ
or similar messaging systems.
* You are comfortable delivering code in environments with strict quality standards.
* You are fluent in
French or Dutch
, with a passive understanding of the other language, and have a
very good level of English
.
Nice-to-Have
* Experience working with micro-services architectures.
* Experience in high-availability or infrastructure-related systems.
* Prior exposure to regulated or mission-critical environments.
What do we offer?
Location: Brussels (Belgium)
Work mode: Hybrid
Onsite presence: Minimum 2 days per week onsite
Contract: Freelance or Permanent