Senior .NET Developer

Appsierra Group; Utrecht; On-site; EUR 70,000 - 110,000; Full time

Job summary

Appsierra Group in Utrecht is seeking a Senior .NET Developer to design and build BI&A applications using .NET C#, Azure, and Blazor. You will shape scalable cloud-native solutions that empower thousands of colleagues to access insights and drive decisions.

You will mentor peers, collaborate with data engineers, BI specialists, and product owners, and apply best practices in performance, security, and maintainability within a large enterprise environment.

Qualifications

• 5+ years of professional .NET C# development experience.
• Proven Azure cloud experience with Functions, App Services, SQL, and DevOps.
• Strong ability to build modern web apps and backend services.
• Solid understanding of software architecture, design patterns, and clean coding.
• Experience in Agile/Scrum teams across multiple disciplines.

Responsibilities

• Design, develop, and maintain high-quality applications using .NET C#, Blazor, and Azure.
• Architect cloud-native solutions with Azure Functions, App Services, and SQL.
• Collaborate with data engineers, BI specialists, and product owners to translate business needs.
• Apply best practices for performance, security, and maintainability in large-scale environments.
• Mentor and guide other developers in modern .NET and cloud development.

Skills

.NET C#

Azure

Blazor

Agile/Scrum

Web apps

Architecture

Tools

Azure DevOps

Azure Functions

Azure App Services

Azure SQL

CI/CD pipelines

Job description

We are seeking a Senior .NET Developer to join our team. You will design and build next‑generation BI&A applications using .NET C#, Azure, and Blazor. Your work will directly impact how thousands of colleagues access insights, make decisions, and better serve our customers.

Key responsibilities

• Design, develop, and maintain high‑quality applications using .NET C#, Blazor, and Azure services.

• Architect cloud‑native solutions that use Azure Functions, Azure App Services, and Azure SQL.

• Work closely with data engineers, BI specialists, and product owners to translate business needs into technical solutions.

• Implement best practices for performance, security, and maintainability in a large‑scale enterprise environment.

• Mentor and guide other developers, sharing knowledge of modern .NET and cloud development.

Required qualifications

• 5+ years of professional experience in .NET C# development.

• Proven experience with Azure cloud services such as Azure Functions, Azure App Services, Azure SQL, and Azure DevOps.

• Strong skills in building modern, interactive web applications and backend services.

• Good understanding of software architecture, design patterns, and clean coding principles.

• Experience working in Agile/Scrum teams and across disciplines.

Nice to have

• Experience with Azure DevOps and CI/CD pipelines.

• Mentoring or coaching experience with junior developers.