Senior Developer .NET

Mission Overview:

Keystone Solutions is seeking an experienced .NET Software Engineer for a consultancy mission at a client site. This role involves contributing to a significant digital transformation within a complex IT landscape. As a consultant, you will develop high-quality software in an agile environment, impacting the social security and healthcare of millions. You will be part of a multidisciplinary team, working in short, iterative cycles, and actively participating in knowledge sharing while embracing new methodologies, including AI-supported development.

Key Responsibilities:

• Actively contribute to code quality through code reviews, automated testing, and the application of best practices.
• Collaborate with product managers, solution architects, and other team members in an agile working style.
• Engage in technical solutions and architectural choices, translating them into concrete implementations.
• Identify and resolve bugs and performance issues in existing applications.
• Contribute to the integration of AI tools into the daily development workflow.
• Document and maintain developed components.
• Actively participate in sprint ceremonies such as refinements, planning, and retrospectives.

Why Join Keystone Solutions:

• Consultancy Nature: Work on-site and embody the consultant identity, tackling diverse challenges across various client environments.
• Dynamic Projects: Experience a variety of projects that enhance your professional development and broaden your learning experiences.
• Turbo-Charged Learning: Benefit from continuous learning opportunities that foster your career growth.
• Skyrocketing Ambition: Join a team committed to your professional advancement within the consultancy framework.
• Values: As a
  

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

  
  

  Duration: 07/09/2026 - 31/12/2026 4 months • (full time)

  
  

  Skills required:

  • .Net C# development - Level: Confirmed - Most recent: Any time
  • Agile / Scrum - Level: Expert - Most recent: Any time
  • AI knowledge transfer to development teams - Level: Confirmed - Most recent: Any time
  • AI-assisted development - Level: Confirmed - Most recent: Any time
  • CI/CD pipelines - Level: Confirmed - Most recent: Any time
  • Cloud (Azure) - Level: Confirmed - Most recent: Any time
  • Git version control - Level: Confirmed - Most recent: Any time
  • Public Sector Experience - Level: Junior - Most recent: Any time
  • REST API development - Level: Expert - Most recent: Any time
  • SQL Data / Relation Databanks - Level: Confirmed - Most recent: Any time
  • Test automatisation (Unit, integration) - Level: Confirmed - Most recent: Any time
  
  

  Language requirements:

  Dutch
  Level Native
  English
  Level Active knowledge
  French
  Level Native