Senior .NET DeveloperLocation:Dublin 1, Ireland (Hybrid, 2 - 3 days onsite, remainder remote.)Day Rate:€550 per dayWork Eligibility:Candidates must possess an Irish/EU passport or a valid work permit for full-time work in the Republic of Ireland.Contract Duration:6 months, scope to extend.OverviewA major organisation in Dublin City Centre is undergoing a large-scale digital transformation programme, placing technology at the core of its operations. The Development Team, within the Technology Solutions Group, is delivering modern, scalable software systems that support public-facing services — including financial services, mobile apps, payments, and customer communications. These systems process over130 million transactions annually.We're seeking aSenior Developerto join this transformation. You'll work on high-impact, project-based initiatives, collaborating with architects, DevOps, testers, and stakeholders to deliver secure, performant applications and APIs using the Microsoft technology stack.Key ResponsibilitiesDesign, develop, and maintain scalable applications and services using C# and .NET Core.Develop RESTful APIs and backend services for enterprise-grade solutions.Collaborate closely with solution architects and other developers to implement technical designs.Participate in Agile ceremonies, including sprint planning and daily stand-ups.Write clean, testable code following SOLID principles and modern design patterns.Work with Azure DevOps and Git for source control, CI/CD pipelines, and build automation.Develop and optimize SQL Server queries, stored procedures, and schema.Contribute to the development of automated unit tests and support quality assurance.Write technical documentation to support system maintenance and knowledge sharing.Required Skills & ExperienceMinimum 7 years of hands-on software development experience.Expertise in C# .NET Core and the Microsoft technology stack .Strong experience with RESTful API development using Web API.Solid understanding of relational databases (SQL Server) and ORM tools like Entity Framework .Experience with Azure cloud services, such as:Azure Web AppsAzure SQLAzure FunctionsAzure Data Factory (a plus)Familiarity with CI/CD tools and automated pipelines (Azure DevOps, GitHub Actions, etc.).Comfortable working in Agile environments (Scrum/Kanban).Strong knowledge of object-oriented programming, design patterns, and SOLID principles .Desirable ExperienceExposure to SAP CDC, PCI DSS, or other compliance standards.Experience writing or maintaining Terraform scripts or ARM templates.Familiarity with unit testing frameworks and best practices in test automation.Experience managing or contributing to large Git repositories in a collaborative team environment.Key Technologies in UseLanguages: C#, .NET Core, JavaScript/TypeScript (frontend optional)Frameworks: ASP.NET Core, Web APICloud: Microsoft Azure (App Services, Functions, SQL, Data Factory)DevOps: Azure DevOps, GitHub, JiraDatabases: SQL Server, Entity FrameworkTools: Visual Studio, Postman, Docker (optional), Terraform (desirable)If you're ahands-on, senior-level developerlooking to work on high-impact systems with cutting-edge technology in a large-scale transformation, we'd love to hear from you.