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Senior .net Developer United States Jobs (On-site work)

18 Job Offers

Senior .NET Developer (Cloud & AI-Enabled)
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Senior .NET Developer role in Santa Ana, US, focused on cloud-based applications and AI-enabled development. Requires 3–5+ years of C#, .NET Core, ASP.NET Core, and Entity Framework experience, plus Python skills. Leverage cloud platforms and AI-assisted tools to enhance functionality and efficie...
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United States , Santa Ana
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Not provided
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Robert Half
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Senior .NET Developer
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Senior .NET Developer needed in La Jolla to support and modernize a mission-critical enterprise app using VB.NET and C#. Requires 8+ years of .NET experience, SQL Server, IIS, and Azure DevOps skills. Ideal for experts in legacy system migration and integration with SharePoint, Excel/VBA, and Pow...
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United States , La Jolla
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Robert Half
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Senior .NET Developer
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Senior .NET Developer sought in Jacksonville, FL. Leverage 3-5+ years of C#, ASP.NET Core, and Angular expertise to build scalable applications. Integrate with Azure services and SQL Server for robust business solutions. Enjoy comprehensive benefits including medical, dental, vision, and 401(k).
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United States , Jacksonville
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Robert Half
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Senior .NET Software Developer
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Senior .NET Software Developer needed for a long-term contract in South Jordan, Utah. You will partner with a technical lead to migrate legacy Web Forms to a modern .NET Core platform using C#, ASP.NET, and Entity Framework. Leverage Azure services and Docker in a collaborative, low-ego environme...
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United States , South Jordan
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Robert Half
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Senior .NET Developer – IAM (PowerShell Focus)
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Seeking a Senior .NET Developer with advanced PowerShell expertise to enhance enterprise IAM solutions in Jersey City or Tampa. You will design .NET applications and automate identity lifecycle, access controls, and integrations using Active Directory and Azure AD. This role requires 8-10 years' ...
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United States , Jersey City, NJ / Tampa, FL
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110000.00 USD / Year
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Senior .NET Developer – IAM (PowerShell Focus)
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Seeking a Senior .NET Developer with advanced PowerShell expertise to enhance enterprise IAM solutions in Jersey City or Tampa. You will design .NET applications and automate identity lifecycle, provisioning, and access controls. This role requires deep IAM knowledge, experience with Active Direc...
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United States , Jersey City, NJ / Tampa, FL
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110000.00 USD / Year
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Senior .Net Developer
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United States , Indianapolis
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Ocean Blue Solutions
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Senior .NET Cloud Native Developer
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Join our dynamic Agile team in Washington, DC, as a Senior .NET Cloud Native Developer. You will develop impactful enterprise applications using .NET 8+, Azure, and modern frameworks like Entity Framework. This role requires 8-10 years of experience and offers high visibility on mission-critical ...
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United States , Washington, DC
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Andworx
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Senior .NET Developer
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Join Andworx as a Senior .NET Developer in Washington, DC. Develop impactful federal applications using Blazor, ASP.NET Core, .NET 8, and Oracle within an Agile team. This role requires 8-10 years of enterprise experience, U.S. citizenship, and offers high-visibility projects.
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United States , Washington
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Andworx
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Senior .NET Developer
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Join Bright Vision Technologies as a Senior .NET Full-Stack Developer in Lincoln, USA. You will build scalable web applications using .NET Core, MVC, and React. Key requirements include SQL Server, RESTful APIs, and CI/CD pipelines. Financial industry experience is a plus.
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United States , Lincoln
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Bright Vision Technologies
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Senior .NET Fullstack Developer
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Join Bright Vision Technologies in Dallas, TX, as a Senior .NET Fullstack Developer. Leverage your 12+ years of .NET, C#, and ASP.NET expertise to build innovative, scalable applications. This role requires strong OOP skills and experience with front-end technologies like Angular. Enjoy a collabo...
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United States , Dallas, TX
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Bright Vision Technologies
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Senior .NET Developer
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Join Bright Vision Technologies as a Senior .NET Full-Stack Developer in Columbus. You will build scalable web applications using .NET Core, MVC, and React, with strong SQL Server and API skills. Leverage your expertise in CI/CD and design patterns to transform business processes in a dynamic, in...
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United States , Columbus
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Bright Vision Technologies
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Senior .Net Full Stack Developer
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Join Bright Vision Technologies as a Senior .Net Full Stack Developer in Frisco, TX. This multi-year project requires 10+ years of .NET experience, with strong C#, .NET Framework, Angular, and RESTful services skills. You will work independently through the full SDLC, writing code, automating tes...
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United States , Frisco
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Bright Vision Technologies
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Senior .NET Developer
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Join Bright Vision Technologies as a Senior .NET Full-Stack Developer in Lincoln, USA. Leverage your expertise in .NET Core, React, and SQL Server to build scalable web applications and RESTful APIs. You will optimize performance and integrate CI/CD pipelines in a collaborative, inclusive environ...
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United States , Lincoln
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Bright Vision Technologies
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Senior .NET Fullstack Developer
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Join Bright Vision Technologies as a Senior .NET Fullstack Developer in Frisco. Leverage your 12+ years with .NET, C#, and modern front-end frameworks like React or Angular to build innovative, scalable solutions. Enjoy a supportive, inclusive work environment with strong career growth potential ...
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United States , Frisco
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Bright Vision Technologies
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Senior .NET Cloud Native Developer
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Join our Agile team in Washington, DC, as a Senior .NET Cloud Native Developer. You will build impactful enterprise applications using .NET 8+, Azure, and modern frameworks like Entity Framework. This role requires 8-10 years' experience, including with Azure DevOps and cloud-native development f...
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United States , Washington, DC
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Not provided
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Andworx
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Senior .NET Developer
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Join Andworx as a Senior .NET Developer in Washington, DC. Develop mission-critical federal applications using Blazor, ASP.NET Core, .NET 8, and Oracle in an Agile team. This role requires 8-10 years of enterprise experience, U.S. citizenship, and offers high-visibility projects.
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United States , Washington, DC
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Not provided
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Andworx
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Senior .NET Developer
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Join Bright Vision Technologies as a Senior .NET Full-Stack Developer in Lincoln, USA. Modernize a legacy MS Access application into a scalable, cloud-ready web solution. Utilize your strong full-stack skills within an Agile team, documenting work in Azure DevOps. This role offers significant car...
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United States , Lincoln
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Not provided
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Bright Vision Technologies
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About the Senior .net Developer role

A Senior .NET Developer is a seasoned software engineering professional responsible for designing, building, and maintaining complex, scalable applications using the Microsoft .NET ecosystem. These individuals typically possess deep expertise in C#, ASP.NET, .NET Core, and related frameworks, and they play a pivotal role in the full software development lifecycle. While junior developers focus on writing code to specific specifications, Senior .NET Developers are expected to architect solutions, make high-level technical decisions, and ensure the long-term health and performance of the systems they build. In the broader landscape of technology jobs, this role bridges the gap between hands-on coding and strategic technical leadership.

Common responsibilities for a Senior .NET Developer include leading the design and implementation of new application features, performing code reviews to enforce best practices and coding standards, and refactoring legacy systems to modern architectures. They are often tasked with creating and maintaining technical documentation, establishing development guidelines, and integrating third-party services or APIs. A significant part of the role involves troubleshooting complex production issues, optimizing database queries, and ensuring application security and data protection. Senior developers also collaborate closely with product managers, business analysts, and other stakeholders to translate business requirements into robust technical specifications. They frequently act as mentors to junior and mid-level developers, guiding them on technical challenges and professional growth.

The typical skills and requirements for these jobs are extensive. On the technical side, mastery of the .NET framework (including .NET Core and .NET 5/6/7/8) is essential, along with proficiency in object-oriented programming principles, design patterns (such as MVC, MVVM, and Dependency Injection), and relational databases like SQL Server or PostgreSQL. Experience with front-end technologies like JavaScript, HTML, CSS, and modern frameworks such as Angular or React is often highly valued. Strong knowledge of version control systems (especially Git), CI/CD pipelines, cloud services (Azure or AWS), and containerization (Docker, Kubernetes) is increasingly standard for senior-level positions.

Beyond hard skills, senior roles demand exceptional analytical and problem-solving abilities. These professionals must be capable of evaluating system processes, performing feasibility studies, and providing accurate time and cost estimates for projects. Soft skills are equally critical; effective communication with both technical and non-technical audiences, the ability to work independently with minimal supervision, and the capacity to manage competing deadlines are all hallmarks of a successful Senior .NET Developer. A bachelor’s degree in computer science or a related field is typical, though equivalent experience is often accepted. Many positions also look for a proven track record of delivering complex projects from conception through deployment and ongoing support. Ultimately, Senior .NET Developer jobs offer a blend of technical depth and strategic influence, making them a cornerstone of many enterprise technology teams.