Senior .NET Full Stack Developer GitHub Copilot

STAFFXPERT LLC is seeking a Senior .NET Full Stack Developer on behalf of our client. We are looking for an experienced developer with 10+ years of experience in the .NET ecosystem to build, enhance, and troubleshoot scalable enterprise applications. The ideal candidate will have strong expertise in C#, ASP.NET Web API, .NET Core, SQL Server, Azure, and CI/CD, along with experience using AI-assisted development tools such as GitHub Copilot. Key Responsibilities Design, develop, test, and maintain scalable enterprise applications using .NET technologies. Develop and integrate RESTful Web APIs and enterprise services. Work with SQL Server for database development and data-related solutions. Troubleshoot application issues and implement effective solutions. Apply software design patterns, OOP principles, and development best practices. Develop and maintain unit tests using frameworks such as xUnit or MSTest. Utilize Git/GitHub and CI/CD pipelines for source control and application delivery. Leverage AI-assisted development tools to improve coding, testing, and development efficiency. Collaborate with cross-functional teams to deliver high-quality solutions. Provide technical guidance and support to offshore development resources. Follow web application security and enterprise development best practices. Required Qualifications

10+ years of professional software development experience. Strong hands-on experience with C#, ASP.NET Web API, and .NET Core. Strong understanding of RESTful APIs, JSON, and HTTP protocols. Solid knowledge of object-oriented programming, design patterns, and software engineering best practices. Experience with GitHub Copilot or similar AI-assisted development tools such as Claude Code or Cursor. Strong Microsoft SQL Server development experience. Experience with xUnit, MSTest, or similar unit testing frameworks. Proficiency with Git and GitHub. Experience with CI/CD pipelines and deployment architecture. Knowledge of Microsoft Azure cloud services. Understanding of web application security best practices. Excellent analytical, communication, and problem-solving skills. Preferred Qualifications Experience in the Insurance or Reinsurance industry. Experience working with enterprise-scale applications. Experience mentoring or providing technical guidance to offshore development teams. Important Candidates must be local to the Warren, NJ area and available for an in-person interview.