Job Openings Full Stack .NET Developer Consultant

About the job Full Stack .NET Developer Consultant

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:

  • 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.
  • Manage and follow up on technical needs within a .NET and microservices architecture.
  • Advise on technology choices (.NET, React, tooling, frameworks).
  • Design solutions focusing on frontend (React) and backend integration.
  • 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.
  • Develop full stack applications (.NET + React).
  • Work according to Agile methodology using Azure DevOps.
  • Implement APIs and microservices.
  • Use Git for version control.
  • 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.
  • Perform unit and integration testing.
  • Apply application & API security best practices.
  • Ensure performance and stability.
  • 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.
  • Work with SQL Server for data management.
  • Monitor data quality and performance.
  • Support data integration within microservices.
  • Analyze, resolve, and follow up on application or network-related issues to restore the operation of these applications or networks.
  • Debug frontend and backend issues.
  • Provide second-line support.
  • Proactively avoid production issues.
  • Formulate proposals for renewal and optimization of the activity domain to meet current and future business needs.
  • Propose improvements in architecture and development practices.
  • Keep up with developments within the .NET and React ecosystem.
  • Ensure knowledge retention and keep data and documentation up to date for the own area of expertise, as well as communicate information to maintain a correct and complete view of all available components and applications throughout their lifecycle.
  • Document code, APIs, and architecture.
  • Share knowledge within the team.
  • Work according to structured documentation standards.

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.


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


Duration: As soon as possible - 31/12/2026 4 months • (full time)


Skills required:

  • .Net - Level: Intermediate - Most recent: This year
  • Agile werkmethodiek - Level: Intermediate - Most recent: This year
  • Application & API security - Level: Intermediate - Most recent: This year
  • Application Insights - Level: Intermediate - Most recent: This year
  • Azure DevOps - Level: Intermediate - Most recent: This year
  • GIT - Level: Intermediate - Most recent: This year
  • Microservices - Level: Intermediate - Most recent: This year
  • React - Level: Intermediate - Most recent: This year
  • Redux - Level: Intermediate - Most recent: This year
  • SQL Server - Level: Intermediate - Most recent: This year
  • Unit & integration testing - Level: Intermediate - Most recent: This year
  • Zustand - Level: Intermediate - Most recent: This year

Language requirements:

Dutch or French
Level Native or bilingual proficiency


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