Mission Overview:

Join Keystone Solutions as a consultant for a full-stack .NET assignment with our client. As a .NET Developer, you will translate the needs and requirements of the client into technical, user-friendly applications. You will be responsible for the (functional)/technical analysis and software development. You will contribute to the ongoing development of the clients e-portal where citizens and care facilities can interact with the clients department. The e-portal is a fully in-house developed platform. All responsibilities are performed as a Keystone Solutions consultant, working closely with the clients teams.

Key Responsibilities:

• Translate client needs and requirements into technical, user-friendly applications.
• Take ownership of (functional)/technical analysis and software development.
• Contribute to the further expansion of the clients e-portal used by citizens and care facilities for interactions with the clients department (a fully in-house developed platform).
• Perform these responsibilities under Keystone Solutions? consultancy model in close collaboration with client stakeholders.

Required Skills and Experience:

• Expert Full-Stack Developer ? Most recent experience
• CQRS (via MediatR in .NET) ? Level: Junior
• DDD (Domain Driven Design) ? Level: Junior
• Knowledge of .NET 6+ ? Level: Confirmed
• Knowledge of ASP.NET MVC 5 ? Level: Confirmed
• Knowledge of React (or similar front-end framework ? e.g., Vue, Angular) ? Level: Confirmed
• Senior Full-stack .NET developer with minimum 6 years of experience
• YARP ? Level: Junior
• At least 5 years of experience as a .NET developer in a Microsoft .NET environment and a bachelor?s or master?s degree in computer science
• At least 2 years of experience developing a SPA front-end and API back-end in .NET Core
• Preferably knowledge of modern databases and relational data management techniques (SQL, ERD)
• Familiar with application security
• Team player who enjoys collaborating with colleagues to successfully complete projects
• Creative with a strong sense of responsibility; you take initiative to deliver high-quality solutions
• In addition to Dutch, you have passive knowledge of English

• Role: Expert Application Developer ? Most recent experience: Any time
• .NET development in Microsoft .NET environment ? Level: Confirmed ? Most recent experience: Any time
• .NET 6 and higher ? Level: Expert ? Most recent experience: Any time
• ASP .NET MVC 5 ? Level: Confirmed ? Most recent experience: Any time
• CQRS (via MediatR in .NET) ? Level: Junior ? Most recent experience: Any time
• DDD (Domain Driven Design) ? Level: Junior ? Most recent experience: Any time
• React ? Level: Confirmed ? Most recent experience: Any time
• Senior Full-stack .NET developer ? Level: Confirmed ? Most recent experience: Any time
• SPA front-end and API back-end in .NET Core ? Level: Junior ? Most recent experience: Any time
• SQL, ERD ? Level: Junior ? Most recent experience: Any time
• YARP ? Level: Junior ? Most recent experience: Any time
• Languages ? Dutch: Active knowledge
• Languages ? English: Passive knowledge
• Languages ? French: Active knowledge

Consultancy Advantages:

• Consultancy Nature of Work: Operate as a Keystone Solutions consultant embedded with the client, collaborating on-site or in a hybrid setup with their teams while benefiting from Keystone?s community and support.
• Dynamic Projects: Tackle diverse challenges across different client initiatives, broadening your exposure to architectures, frameworks, and domains.
• Turbo-Charged Learning and Development: Access continuous learning, knowledge-sharing, and mentorship through Keystone Solutions to accelerate your growth in full-stack .NET, SPA frameworks, and modern cloud-aligned practices.
• Ambition Skyrocketing within a Consultancy Framework: Build a high-impact career through varied client engagements, progressively taking on more responsibility, ownership, and technical leadership.

Keystone Solutions? Values in Action:

• Excellence and craftsmanship: Deliver robust, secure, and maintainable solutions that stand the test of time.
• Collaboration and empathy: Partner closely with client stakeholders and teammates to achieve successful outcomes.
• Integrity and accountability: Take ownership from analysis to delivery, honoring commitments and quality standards.
• Curiosity and growth mindset: Embrace continuous improvement, knowledge-sharing, and modern best practices.

Role-Specific Impact as a Consultant:

• Apply full-stack .NET expertise (.NET 6+, ASP.NET MVC 5, React or similar) to deliver impactful features across SPA front-ends and API back-ends.
• Leverage CQRS (via MediatR) and DDD fundamentals to structure scalable, maintainable solutions tailored to client needs.
• Contribute to secure, data-driven applications using relational techniques (SQL, ERD) and modern platform capabilities, including YARP where applicable.
• Shape the client?s e-portal capabilities through end-to-end responsibility, from functional/technical analysis to high-quality delivery.

How to Apply:

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