Mission Overview:
We are seeking a Full Stack .NET Developer for a consultancy mission at a client site, representing Keystone Solutions. The role involves developing, implementing, and maintaining software applications within a .NET environment to ensure a stable, high-performance, and secure IT environment that optimally supports business processes and user experience.
Key Responsibilities:
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Contribute to the renewal of hardware and/or software components and perform necessary functional or technical analyses to meet the needs of end-users and the company.
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Manage and follow up on technical needs within a .NET and microservices architecture.
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Advise on technology choices (.NET, React, tooling, frameworks).
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Design solutions focusing on frontend (React) and backend integration.
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Develop or determine technical requirements for, as well as implement, new hardware or software and applications to provide a quality set of equipment and applications.
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Develop full stack applications (.NET + React).
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Work according to Agile methodology using Azure DevOps.
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Implement APIs and microservices.
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Use Git for version control.
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Monitor, maintain, test, and secure the IT infrastructure and/or software applications to ensure a high degree of reliability, security, and user-friendliness for end-users.
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Perform unit and integration testing.
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Apply application & API security best practices.
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Ensure performance and stability.
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Maintain data structures and/or system settings, providing a performant environment for data management and ensuring backups of user files to guarantee the correctness of business data and quick recovery in case of loss or damage.
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Work with SQL Server for data management.
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Monitor data quality and performance.
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Support data integration within microservices.
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Analyze, resolve, and follow up on application or network-related issues to restore the operation of these applications or networks.
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Debug frontend and backend issues.
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Provide second-line support.
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Proactively avoid production issues.
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Formulate proposals for renewal and optimization of the activity domain to meet current and future business needs.
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Propose improvements in architecture and development practices.
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Keep up with developments within the .NET and React ecosystem.
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Ensure knowledge retention and keep data and documentation up-to-date for the own area of expertise while communicating information to maintain a correct and complete view of all available components and applications throughout their lifecycle.
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Document code, APIs, and architecture.
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Share knowledge within the team.
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Work according to structured documentation standards.
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Roles
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Medior Full-Stack DeveloperMost recent experience This year
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Skills
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.Net
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Agile werkmethodiek
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Application & API security
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Application Insights
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Azure DevOps
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GIT
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Microservices
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React
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Redux
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SQL Server
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Unit & integration testing
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Zustand
Profile:
Medior profile (approximately 2-3 years of experience). Bachelor's degree or equivalent through experience. Strong in maturity, drive, and team fit.
Why Join Keystone Solutions:
As a consultant at Keystone Solutions, you will engage in dynamic projects that offer diverse challenges across various client environments. You will experience turbo-charged learning opportunities and have the chance to skyrocket your ambition and career growth. Being a 'K-Stone' means bringing our core values to every engagement, ensuring a fulfilling and impactful consultancy experience.
If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today .
Duration: 10/06/2026 - 31/12/2026 7 months (full time)
Language requirements:
Dutch or French
Level Native or bilingual proficiency
Screening questions:
Beschik(t) u / uw bedrijf reeds over een veiligheidsmachtiging?
Geef de afstand op in km tussen de woonplaats van de kandidaat en de site in Dessel (berekend via Google Maps)
