Senior .NET Developer
Job Overview The Senior .NET Developer will design, develop, enhance, and maintain enterprise web applications across both modern and legacy .NET environments. This role requires strong hands-on experience with ASP.NET Web Forms, ASP.NET AJAX, C#, SQL Server, and modern .NET technologies while supporting long-lived applications and evolving them through modern development practices. Job Duties
- Design, develop, test, debug, and maintain enterprise web applications using .NET technologies.
- Develop and enhance applications using ASP.NET 4.x, ASP.NET AJAX Web Forms, ASP.NET Core, and modern .NET.
- Maintain and enhance legacy applications using C#, JavaScript, and jQuery.
- Develop user interfaces and application components using HTML5, CSS3, Razor Views, Razor Components, and Blazor.
- Build and maintain applications using Telerik AJAX controls and Telerik Reports.
- Design and implement data access solutions using SQL Server and Entity Framework Core.
- Develop and maintain RESTful APIs and application integrations.
- Apply layered/N-Tier architecture, Repository and Specification patterns, and Dependency Injection.
- Deploy, configure, and support applications within Internet Information Services (IIS).
- Use Azure DevOps, Git, TFS, and Visual Studio throughout the software development lifecycle.
- Implement application logging, diagnostics, monitoring, and troubleshooting solutions.
- Develop and support background processing through scheduled jobs, hosted services, Windows services, and Azure-hosted equivalents.
- Troubleshoot production issues and implement application enhancements, fixes, and performance improvements.
- Collaborate with technical and business stakeholders to understand requirements and deliver effective solutions.
- Ramp up quickly within complex, domain-heavy codebases and contribute to long-term application support and enhancement.
Required Skills
- 8+ years of professional software development experience.
- 5+ years of hands-on experience with ASP.NET AJAX and .NET Framework 4.x.
- 1+ years of experience with ASP.NET Core / modern .NET.
- Demonstrated success in long-term contract engagements.
- 8+ years of experience with C#.
- 5+ years of experience with JavaScript and jQuery.
- 5+ years of recent experience with ASP.NET 4.x Framework.
- 5+ years of recent experience with ASP.NET AJAX Web Forms.
- 2+ years of recent experience with Telerik AJAX controls.
- 2+ years of recent experience with Telerik Reports.
- 5+ years of recent experience with Internet Information Services (IIS).
- 1+ years of experience with ASP.NET Core / .NET 8.
- 1+ years of experience with Blazor (Server and/or WebAssembly).
- 1+ years of experience with Razor Views and Razor Components.
- 5+ years of experience with HTML5 / CSS3.
- 8+ years of experience with SQL Server.
- 1+ years of experience with Entity Framework Core.
- Experience with Layered / N-Tier architecture.
- Experience with Repository and Specification patterns.
- Experience with Dependency Injection.
- Experience with RESTful API design.
- Experience with Azure DevOps (Repos, Pipelines, Boards).
- Experience with Git.
- Experience with TFS.
- Experience with Visual Studio 2022 and 2026.
- Experience with application logging and diagnostics using Application Insights or an equivalent solution.
- Experience with background processing using scheduled jobs.
- Experience with hosted services, including Azure Container Instance and Container Registry.
- Experience with Docker Desktop.
- Experience with Windows services or Azure-hosted equivalents, as applicable.
Preferred Qualifications
- Experience supporting and enhancing long-lived enterprise systems.
- Prior government or regulated-industry experience.
- Exposure to Azure App Services and Azure SQL.
- Ability to ramp up quickly in complex, domain-heavy codebases.