Technical Lead .NET

Role Name: Technical Lead .NET Location: Brussels, Belgium Remote Work: Yes Start Date: 14/09/2026 Language Requirement: French or Dutch, CEFR C2, and English, CEFR C1 Work Regime: Full-time, 100%

Technical Leadership & Team Guidance

• Advise and guide the development team.
• Promote a culture of technical excellence.
• Take overall technical responsibility for the software systems within the application team.
• Ensure software development and implementation align with organisational standards and objectives.
• Support developers in making sound technical decisions.

Hands-on .NET Development

• Spend a significant portion of time on practical development activities.
• Participate directly in coding.
• Develop new application functionality.
• Resolve software defects and technical issues.
• Remain actively involved in implementation rather than operating only at architectural level.

System Design & Architecture

• Design scalable, reliable, and maintainable systems.
• Respect defined architectural standards.
• Collaborate with the architecture team to complement the overall architecture.
• Work with the Portfolio Architect to align with strategic architecture.
• Make appropriate additional design decisions where required.

Requirements Analysis

• Work with analysts to refine functional and business requirements.
• Translate requirements into robust technical solutions.
• Understand customer needs and business objectives.
• Ensure technical solutions remain aligned with broader organisational goals.

Code Review & Quality Assurance

• Conduct thorough code reviews.
• Ensure high standards of software quality.
• Implement and maintain strong quality assurance practices.
• Promote development best practices.
• Safeguard maintainability and technical consistency.

Performance Optimisation

• Regularly evaluate software performance.
• Identify bottlenecks and performance issues.
• Implement appropriate optimisation measures.
• Ensure stable and efficient application behaviour.

Security

• Integrate current security practices into software solutions.
• Consider security implications when making technical and architectural decisions.
• Ensure software systems are protected against relevant threats.
• Align security implementation with architectural choices.

Technical Deliverables & I&O Coordination

• Prepare detailed technical documentation for software releases.
• Prepare infrastructure requests.
• Produce documentation required for production deployment and commissioning.
• Manage configuration change requests towards Infrastructure & Operations.
• Coordinate with I&O teams to maintain system stability and performance.

Technology Evaluation & Integration

• Evaluate new technologies.
• Assess their relevance against business objectives and architectural choices.
• Integrate suitable technologies into the application landscape.
• Identify opportunities to improve system capabilities and technical efficiency.

Complex Problem Resolution

• Lead the resolution of complex technical issues.&nb

Required Skills & Expertise

The request does not provide a separate formal skills matrix. Based on the stated responsibilities, the candidate should demonstrate strong expertise in the following areas.

Must Have

• Senior-level .NET development experience.
• Strong hands-on coding capability.
• Technical leadership within application development teams.
• Software and system design.
• Scalable and maintainable application architecture.
• Code review and quality assurance.
• Performance optimisation.
• Application security practices.
• Technical documentation.
• Infrastructure and configuration change coordination.
• Requirements-to-technical-solution translation.
• Complex technical troubleshooting.
• Collaboration with architecture and Infrastructure & Operations teams.
• French or Dutch at CEFR C2.
• English at CEFR C1.

Should Have

• Developer mentoring and coaching.
• Strong stakeholder communication.
• Cross-functional collaboration.
• Technology evaluation and integration.
• Experience coordinating with portfolio or enterprise architects.
• Experience supporting application maintenance as well as new development.
• Strong decision-making and problem-solving capability.
• Ability to align technical objectives with business goals.