Technical Lead .NET

Mission Overview:

As a Technical Lead at a client site, you will play a key role in the technical direction of the organization, primarily within a specialized applications team. You will be responsible for providing effective technical solutions for a specific portfolio. Your role encompasses technical oversight of new project initiatives and maintenance of existing applications. In collaboration with developers and other team members, including functional experts and business analysts, you will also ensure coordination with the portfolio architect and the Infrastructure & Operations (I&O) teams. Reporting directly to the project manager, your expertise is essential to drive innovation and integrate technological solutions that align with business objectives and enhance operational efficiency.

Responsibilities:

Your role as a Technical Lead combines high-level technical oversight with hands-on coding. This dual responsibility ensures that you remain closely tied to the technical details and challenges of the project while providing technical leadership and guidance on technical design. The main responsibilities include:

• Technical leadership and mentoring: Provide guidance and support to the development team, fostering a culture of technical excellence.
• Final technical responsibility for software systems within the application team: Oversee all technical aspects within the application team, ensuring that software development and deployment meet organizational standards and objectives.
• Active contribution to development: Dedicate a significant portion of your time to hands-on development tasks, participating in coding, feature development, and bug fixing.
• Preparation of technical deliverables: Create detailed technical documentation for software releases, including infrastructure requests and production deployment documents.
• Configuration change requests to I&O: Manage configuration change requests to I&O to ensure system stability and performance.
• System design: Design scalable, reliable, and maintainable systems while adhering to architectural standards and complementing the overall architecture in collaboration with the architecture team.
• Needs analysis: Collaborate with analysts to refine requirements and translate them into robust technical solutions.
• Code review and quality assurance: Ensure code quality through thorough reviews and the implementation of rigorous quality assurance processes.
• Performance optimization: Regularly assess software performance and make necessary adjustments for optimization.
• Security considerations: Integrate up-to-date security practices to protect software systems from threats, considering architectural choices.
• Technology evaluation and integration: Evaluate and integrate new technologies that align with business objectives and enhance system capabilities, considering architectural choices.
• Troubleshooting and support: Lead the resolution of complex technical issues, providing expert troubleshooting and support.
• Compliance with architectural standards and collaboration: Collaborate with the portfolio architect to align with strategic architecture while maintaining the necessary latitude for complementary design choices.

Interpersonal Skills:

For a Technical Lead, particularly in a .NET environment, key interpersonal skills typically include:

• Leadership: Ability to inspire, motivate, and guide other developers towards achieving project goals. Collaborative spirit to work harmoniously with various cross-functional teams. Sensitivity and consideration of team members' emotions and motivations to create a positive work environment. Clear and effective communication skills, both verbal and written, to collaborate with team members, stakeholders, and non-technical audiences.
• Mentorship: Willingness to share knowledge, provide feedback, and foster the professional development of other developers. Ability to mediate conflicts within the team and negotiate solutions with stakeholders.
• Problem-solving and decision-making: Strong analytical skills to identify issues and develop innovative solutions. Confidence and competence to make crucial decisions impacting project direction and execution. Ability to understand the overall business objectives and align technical goals accordingly. Ability to comprehend client needs and translate them into technical solutions.
• Resilience: Flexibility to adapt to changing technologies, requirements, and environments. Ability to prioritize tasks and manage time effectively to meet deadlines. Endurance to handle deadline pressures and technical challenges without compromising performance. Commitment to staying informed about the latest industry trends and technologies.

Language Skills:

• Fluency in one of the two national languages: FR or NL (level C2)
• Very good level of English (level C1)

We offer you an interesting consultancy mission in ICT and Data services that impacts society, with numerous advantages:

• A good work-life balance;
• Flexible working hours for a 40-hour week (7:30 AM to 8:00 PM with fixed slots between 9:00 AM and 12:00 PM and 1:00 PM and 4:00 PM);
• Possibility of teleworking;
• Workspaces organized according to activities;
• Easy accessibility via public transport;
• Car and bike parking in the building;
• Individual lockers;
• Company restaurant;
• Various self-development opportunities: training and learning possibilities (to be followed outside working hours) via our e-academy self-learning platform or via the Microsoft Enterprise Skills Initiative platform.

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.

Duration: 10/08/2026 - 31/12/2026 5 months • (full time)

Skills required:

• .NET Development - Level: Expert - Most recent: Any time
• ASP .NET Web API - Level: Expert - Most recent: Any time
• Authentication/Authorization (JWT, OIDC, claims) - Level: Confirmed - Most recent: Any time
• Azure Bus - Level: Confirmed - Most recent: Any time
• Blazor - Level: Confirmed - Most recent: Any time
• C# / .NET (Core, 10) - Level: Confirmed - Most recent: Any time
• DevOps Server Management - Level: Confirmed - Most recent: Any time
• GIT - Level: Confirmed - Most recent: Any time
• Microsoft Azure - Level: Confirmed - Most recent: Any time
• Networking Concepts - Level: Confirmed - Most recent: Any time
• patterns & best practices - Level: Confirmed - Most recent: Any time
• REST, Swagger/OpenAPI - Level: Confirmed - Most recent: Any time
• Security (OWASP/OAUTH/OpenId/...) - Level: Confirmed - Most recent: Any time
• SQL Server - Level: Confirmed - Most recent: Any time
• Testing (unit + integration) - Level: Confirmed - Most recent: Any time

Language requirements:

Dutch
Level Native
English
Level Active knowledge
French
Level Native