Senior .NET Blazor UI Lead in Azure & AI

EngiFlex BV; Brussel Hoofdstad; Hybrid; EUR 75,000 - 110,000; Full time

Benefits offered by this job

Company car

Job summary

EngiFlex BV in Belgium seeks a Senior .NET Developer with a strong UI focus to design, develop and maintain modern business applications for public-sector clients. You will own user interfaces while collaborating with analysts, architects and security specialists to ensure accessibility, performance and secure integration across services.

You will guide feature development, contribute to a shared design system and ensure consistency across devices and browsers.

Qualifications

• Extensive experience with C# and modern .NET development.
• Hands-on Blazor development and Razor components expertise.
• Strong HTML/CSS skills and responsive design.
• WCAG 2.1 AA accessibility compliance experience.
• REST API integration with ASP.NET Core.
• OAuth 2.0 / OpenID Connect authentication implementation.
• EF Core with SQL data access proficiency.
• Solid testing approach: unit, component, integration; UI automation helpful.
• Git, Azure DevOps and CI/CD pipelines for Azure deployments.
• Experience with AI-assisted development tools is a plus.
• JS/TS interoperability with Blazor is advantageous.
• Cloud/Azure knowledge and container deployment awareness.
• Strong front-end architecture and design pattern understanding.
• Performance debugging and browser diagnostics experience.
• Focus on security, quality, maintainability and safe coding practices.

Responsibilities

• Provide technical direction for Blazor development across teams.
• Develop features, reusable components and bug fixes in C#, .NET and Blazor.
• Contribute to shared component library and design system with MudBlazor.
• Build accessible, responsive interfaces meeting WCAG requirements.
• Work with analysts, UX and security to translate requirements into technical solutions.
• Integrate Blazor apps with REST APIs and JSON services; extend APIs as needed.
• Implement secure auth flows using OAuth 2.0 and OpenID Connect.
• Maintain code quality with PR reviews, SonarQube and clear components.
• Define tests: unit, Blazor component, service integration; automate where possible.
• Use Git, Azure DevOps and CI/CD to manage versions and deployments to Azure.
• Monitor performance; optimize loading and rendering; use diagnostic tools.
• Coach and mentor developers; lead technical improvements and reviews.
• Resolve end-to-end issues across browser, API and database layers.
• Evaluate new .NET/BLazor technologies for value and security alignment.

Skills

C# / .NET

Blazor & Razor components

HTML / CSS

Accessibility (WCAG 2.1 AA)

REST APIs & JSON

OAuth 2.0 / OpenID Connect

EF Core / SQL

Unit / Component / Integration testing

Git / Azure DevOps / CI/CD

AI-assisted development

JavaScript / TypeScript interop

Cloud Azure / containerised deployment

Front-end architecture & design

Performance & browser diagnostics

Security best practices

Tools

MudBlazor

Azure Service Bus

NServiceBus

Azure DevOps pipelines

Job description

EngiFlex BV in Belgium seeks a Senior .NET Developer with a strong UI focus to design, develop and maintain modern business applications for public-sector clients. You will own user interfaces while collaborating with analysts, architects and security specialists to ensure accessibility, performance and secure integration across services.

You will guide feature development, contribute to a shared design system and ensure consistency across devices and browsers.