Role: Senior .NET Developer

Duration: 6 months (ASAP - June 1, 2026)

Location: Utrecht, Netherlands

Remote Work: Hybrid

Work Regime: 40 Hours/week

Languages: Dutch, English

Job Description:

Assignment Description

As a Senior .NET Developer, you'll be the technical driving force behind the modernization of our applications. You'll work in a multidisciplinary team and take the lead on complex migrations and containerization. You're not only strong in execution but also a sparring partner for the team and actively contribute to improving our development processes. You have a broad perspective on architecture and security and know how to make solutions scalable and future-proof.

Responsibilities and Duties

• Modernize and containerize the organization's applications to enable a cloud-native platform.

Objective of the Assignment

• Lead complex migrations and containerization
• Improve development processes
• Provide architectural and security expertise

Requirements

• .NET
• Azure container
• Azure DevOps
• Azure key vault
• Azure SQL
• Docker
• Next.js
• React

Activities

• Migration of SQL Server database to Azure SQL.
• Containerizing Windows Services and ASP.NET Core Web API applications.
• Migration of WCF Services (.NET Framework 4.8) to .NET 9 and containerization.
• Deploying containers to Azure Container Apps.
• Setting up tracing and logging with OpenTelemetry.
• Setting up CI/CD pipelines in Azure DevOps.
• Rebuilding existing ASP.NET MVC portals to Next.js (React knowledge is a plus).

Background Assignment

The Netherlands Information Services Bureau (BIDN) / Stich ting Inlichtingenbureau (Information Bureau Foundation) is a public service provider that supports municipalities with reliable information to help residents quickly and honestly. BIDN plays a key role in the social domain (employment, income, healthcare, taxes, debt) and works with multidisciplinary teams on innovative solutions. The organization has an open, informal culture and is fully engaged in an IT transition to an agile, cloud-native platform.

To Demand

• .NET Framework (4.8) a .NET 9.
• Azure DevOps.
• Experience with Azure, specifically:
• Azure Container Apps
• Azure Storage
• Azure SQL
• Azure Key Vault
• Docker.
• OpenTelemetry.
• (Pré) Front-end development in React en/of Next.js.

Soft Skills

• Social and team-oriented.
• Initiative and strong communication skills.
• Persistent and convincing.