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Senior .net Developer United States Jobs

37 Job Offers

Senior Application Developer (Symitar / .NET)
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Senior Application Developer (Symitar / .NET) sought by a growing financial services firm for a fully remote role (must reside in Los Angeles). You will design, develop, and support critical applications using C#, ASP.NET, SQL Server, and Symitar tools (SymConnect, PowerOn). Requires 5+ years of ...
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United States , Los Angeles
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130000.00 USD / Year
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Robert Half
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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 sought for a hybrid role in Atlanta, GA. You will design and build scalable, cloud-native applications using Angular, .NET Core, and Azure. Requires 5+ years of full-stack experience, expert-level Angular, and strong SQL Server skills. Join an Agile team to deliver high-qual...
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United States , Atlanta
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Not provided
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NTT DATA
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Senior .NET Developer
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Senior .NET Developer role with a growing HR tech company—fully remote, East Coast/Metro Atlanta preferred. You’ll work directly with the CTO, owning full-stack development using C#, .NET, React, and React Native in an Azure environment. Ideal for experienced developers (8–10 years) seeking auton...
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United States , Roswell
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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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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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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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Not provided
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Robert Half
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Senior .NET Software Developer
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Join our team in Los Angeles as a Senior .NET Software Developer. You will design and build modern web applications, RESTful APIs, and AI chatbot integrations using .NET 7/8 and Angular. We seek an expert in DDD, clean architecture, and Azure services (SQL, Service Bus) who excels in mentoring an...
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United States , Los Angeles
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Not provided
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Intratek Computer, Inc.
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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
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Lead a major application modernization program, migrating from .NET Framework 4.8 to .NET Core 8 and SQL Server to CockroachDB. Utilize your 10+ years of .NET expertise to refactor legacy code and build scalable REST APIs. This senior role is based in Jersey City, Charlotte, or Addison, offering ...
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United States , Jersey City, NJ; Charlotte, NC; Addison, TX
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115000.00 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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Join a major application modernization program as a Senior .NET Developer. You will lead the migration from .NET Framework 4.8 to .NET Core 8 and transition from SQL Server to CockroachDB. This role requires deep expertise in .NET, Web APIs, and refactoring legacy enterprise applications. The pos...
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United States , Jersey City NJ , Charlotte NC , Addison TX
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115000.00 USD / Year
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Senior .NET Full Stack Developer
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Join our team in Austin as a Senior .NET Full Stack Developer. You will design and maintain secure, public-facing web applications using modern .NET 8+, C#, and ASP.NET. This role requires deep expertise in SQL/PL-SQL, front-end technologies (HTML, CSS, JavaScript), and Agile methodologies. We of...
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United States , Austin
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Not provided
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Dutech Systems
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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 Developer
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Join our team as a Senior .NET Developer in Suffern, US. Utilize your 6+ years of C# and full stack expertise with Angular to build scalable enterprise applications. This role offers a competitive benefits package including medical, dental, and 401(k). Experience in healthcare projects is a valua...
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United States , Suffern
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Not provided
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Robert Half
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Senior .NET Developer
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United States , Montebello
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Not provided
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Robert Half
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Senior .NET Developer
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Seeking a Senior .NET Developer in Irving for a hybrid role. Design end-to-end automation systems and microservices using C#, ASP.NET, and RESTful APIs. Requires 5+ years with .NET Core, microservices, SQL, and CI/CD pipelines like GitHub. Build scalable data solutions in a dynamic environment.
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United States , Irving
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NTT DATA
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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 Andworx as a Senior .NET Developer in Washington, DC. Develop impactful enterprise applications for a federal agency using ASP.NET, .NET 6, and Azure DevOps. Lead in an Agile team, leveraging your 8+ years of experience with C#, MVC, and Oracle. This role offers high visibility on mission-cr...
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United States , Washington, DC
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Not provided
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Andworx
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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.