System Expert – FULL STACK .NET DEVELOPER – Belgium (On-site)

Hive-X; Dessel; Sur place; EUR 45 000 - 60 000; Plein temps

Résumé du poste

Hive-X is looking for a SYSTEM EXPERT – FULL STACK .NET DEVELOPER based in Antwerp, Belgium. The successful candidate will be responsible for developing high-quality software applications within a .NET environment, ensuring a stable and secure IT infrastructure.

Key responsibilities include managing technical needs, implementing APIs, and conducting testing. A Bachelor's degree and 2–3 years of experience are required, alongside strong skills in .NET and React. Collective closure is planned from 14/07/2026 to 02/08/2026.

Qualifications

• 2–3 years of experience in a relevant development role.
• Strong focus on team fit, maturity, and drive.
• Experience with .NET and React ecosystems.

Responsabilités

• Develop and maintain high-performance .NET applications.
• Design solutions integrating frontend and backend systems.
• Implement and secure APIs and microservices.

Connaissances

Full stack development (.NET + React)

Agile methodologies

API and microservices implementation

SQL Server management

Unit and integration testing

Git for version control

Formation

Bachelor's degree or equivalent through experience

Outils

Azure DevOps

Git

Description du poste

SYSTEM EXPERT – FULL STACK .NET DEVELOPER

Purpose of the position: The position is responsible for developing, implementing and maintaining software applications within a .NET environment in order to guarantee a stable, high-performance and secure IT environment and thus optimally support business processes and user experience.

Responsibilities

• Contribute to the renewal of hardware and/or software components and perform the necessary functional or technical analyses with the aim of meeting the needs of end users and the company.
• Manage and monitor technical needs within a .NET and microservices architecture.
• Advise on technology choices (.NET, React, tooling, frameworks).
• Design solutions with a focus on frontend (React) and backend integration.
• Develop or determine the technical requirements for, as well as implement, new hardware or software and applications to provide a high-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.
• Monitor performance and stability.
• Maintain data structures and/or system settings, provide a high-performance environment for data management and ensure backups of user files with the aim of ensuring the correctness of company data and being able to quickly restore it in the event of loss or damage.
• Work with SQL Server for data management.
• Monitor data quality and performance.
• Support data integration within microservices.
• Analyze, solve and follow up on application or network related problems with the aim of restoring the functioning of these applications or networks.
• Debug frontend and backend issues.
• Provide second-line support.
• Proactively avoid production problems.
• Formulate proposals for renewal and optimization of the activity domain with the aim of meeting current and future business needs.
• Formulate improvements in architecture and development practices.
• Monitor developments within the .NET and React ecosystem.
• Secure knowledge and keep up-to-date data and documentation for your own expertise domain as well as communicate the information with the aim of maintaining a correct and complete picture of all available components and applications during the entire life cycle.
• Document code, APIs and architecture.
• Share knowledge within the team.
• Work according to structured documentation standards.

Qualifications

• Medior profile with ±2–3 years of experience.
• Bachelor’s degree or equivalent through experience.
• Strong in: maturity, drive and team fit.

Please note: There is a collective closure from 14/07/2026 to 02/08/2026. Given the course of the selection procedure and the application for a security clearance/advice, the candidate will only be able to start in August.