Senior Full stack Developer - .NET and Azure

Employment International; Ireland; On-site; EUR 90,000 - 120,000; Full time

Job summary

Employment International is seeking an experienced Senior Full-Stack Developer in Ireland to rewrite a legacy ASP.NET WebForms application into a modern .NET+Angular architecture on Microsoft Azure.

You will collaborate with product owners, architects, and developers to replace the legacy system with a robust, cloud-ready solution and ensure continuity of business functionality.

Qualifications

• Excellent English communication skills (technical and business).
• Hands-on with C# and .NET (Core / 6+).
• Proven experience with Angular (v18+).
• Understanding of ASP.NET WebForms and legacy apps.
• Experience with Microsoft Azure configuration.
• Strong SQL Server and Cosmos DB skills.
• Experience integrating with Microsoft Graph API.
• REST API design and implementation; SignalR experience.
• Knowledge of authentication/authorization (OAuth, Entra).
• Git-based version control and CI/CD pipelines.

Responsibilities

• Rewrite a legacy ASP.NET WebForms application to a modern .NET + Angular stack.
• Design and build scalable backend services using .NET (C#).
• Develop responsive front-end features with Angular.
• Integrate with Microsoft Graph API and other APIs.
• Design, migrate and maintain SQL Server and Cosmos DB databases.
• Implement cloud-native solutions using Microsoft Azure (Serverless, Functions, Cosmos DB, Storage, Event Grid).
• Maintain high code quality through testing, code reviews and best practices.
• Collaborate with stakeholders to translate legacy behavior into modern solutions.

Skills

C# / .NET

Angular

Azure

SQL Server

Cosmos DB

ASP.NET WebForms

REST API

SignalR

OAuth / Entra

Git / CI-CD

Tools

Microsoft Graph API

Job description

We are looking for an experienced Senior Full-Stack Developer to help rewrite a legacy ASP.NET WebForms application to a modern, scalable architecture using .NET, Angular, and Azure. This role will play a key part in redesigning, rebuilding, and modernizing the application while ensuring continuity of business functionality.

You’ll work closely with product owners, architects, and other developers to replace the legacy system with a robust, cloud-ready solution.

Location: Candidates need to be located in UK or Ireland.

Key Responsibilities

• Contribute to the rewrite of a legacy ASP.NET WebForms application to a modern .NET + Angular stack
• Design and build scalable backend services using .NET (C#)
• Develop responsive, maintainable front-end features using Angular
• Integrate with Microsoft Graph API and other external/internal APIs
• Design, optimize, and maintain SQL Server and Cosmos DB databases, including data migration strategies
• Implement cloud-native solutions using Microsoft Azure (Serverless, Functions, Cosmos DB, Storage, Event Grid, etc.)
• Ensure high code quality through testing, code reviews, and best practices
• Collaborate with stakeholders to understand legacy behavior and translate it into modern solutions

Required Skills & Experience

• Strong communication skills in English (both technical and business conversations)
• Strong experience with C# and .NET (Core / 6+)
• Proven hands-on experience with Angular (v18+, standalone, signals)
• Some understanding of ASP.NET WebForms and legacy applications
• Experience working with and configuring Microsoft Azure
• Strong SQL Server and document database skills (preferably Cosmos DB)
• Experience integrating with Microsoft Graph API
• REST API design and implementation and experience with SignalR
• Familiarity with authentication/authorization (OAuth, Entra, etc.)
• Git-based version control and modern CI/CD pipelines