Senior Dotnet Developer

Job Title: .NET Developer (Local candidates only)Job Location: Lansing, MI (onsite)Job Duration: 12+ Months ContractJob Responsibilities: Participate in technical architecture discussions, modernization initiatives, and forward‑looking solution design efforts.Allocate work effort across enhancements and maintenance activities, with approximately 40% focused on new features and enhancements and 60% on maintenance and bug fixesDesign, develop, and maintain ASP.NET MVC applications and Web APIs using JSON, Swagger, and DapperMaintain and enhance CI/CD pipelines in Azure DevOps with strong Git-based source control practicesBuild and enhance front-end functionality using JavaScript, jQuery, Bootstrap, and Telerik UIDevelop and maintain Crystal Reports to support business reporting needsTune SQL queries and optimize database performance across distributed systemsUtilize Visual Studio for enterprise application development and debuggingRequired Qualifications:9+ years of professional experience developing enterprise applications using C# and .NET Framework 4.8. Hands-on experience developing applications using modern .NET versions (e.g., .NET Core, .NET 8, or .NET 10).Advanced proficiency with SQL Server 2019, including SSIS package development, complex SQL scripting, stored procedures, and performance optimization.Proficiency in API testing using Postman and SoapUI, along with automated UI testing using Selenium.Strong understanding of design patterns (Repository, Factory, Dependency Injection) and demonstrated adherence to SOLID principles.Expert-level knowledge of secure coding practices, including prevention of XSS, SQL injection, and implementation of robust security logging.Experience building and maintaining unit tests using NUnit or XUnit frameworks.Ability to design scalable and maintainable systems using clean architecture and modular design principles. Preferred Qualifications:Proven ability to work collaboratively across multi-disciplinary, cross-functional teams to support seamless system and API integrations.9+ years working within Agile/SCRUM environments, actively contributing to sprint planning, backlog refinement, and team-based delivery.