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Senior .NET Developer (.NET Framework / .NET Core) Client: Department of Veterans Affairs (VA)Location: 100% Remote (U.S. Based)Salary: $120,000 – $140,000 annually (Based on experience and technical interview)Employment Type: Full-TimeCitizenship: U.S. Citizen RequiredClearance: Must be able to meet VA security and suitability requirementsKeywords: .NET Position | Senior .NET Developer | C# | .NET Core | Azure API | Remote Position OverviewWe are seeking an experienced Senior .NET Developer to support the Department of Veterans Affairs by developing and maintaining enterprise APIs within an Azure-based integration platform. This platform enables secure communication between CRM applications and backend databases through scalable, high-performance RESTful APIs.The successful candidate will design, develop, test, and support .NET Framework and future-state .NET Core APIs while collaborating with application developers, architects, and data teams to deliver secure, reliable integration services supporting critical VA business operations.Key ResponsibilitiesAPI DevelopmentDesign, develop, and maintain enterprise REST APIs using C#, ASP.NET Web API, .NET Framework, and .NET Core.Develop scalable, secure, and maintainable integration services supporting enterprise applications.Build APIs that integrate with authentication providers using OAuth, JWT, and modern security patterns.Azure IntegrationPackage and deploy APIs into Azure environments.Publish and manage APIs using Azure API Management (APIM), including routing, versioning, monitoring, and policy enforcement.Support cloud-based API modernization initiatives and future migration from .NET Framework to .NET Core.Development & TestingDevelop unit, integration, and functional tests for enterprise APIs.Participate in code reviews and technical design sessions.Leverage AI-assisted development and testing tools to improve software quality and productivity.Troubleshoot and resolve production issues affecting enterprise APIs.DevOps & CollaborationDeploy applications through automated CI/CD pipelines.Collaborate with frontend developers, backend database teams, DevOps engineers, QA analysts, and solution architects.Create and maintain technical documentation, API specifications, and implementation guides. Required QualificationsBachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field.Minimum 5 years of experience developing enterprise .NET applications and APIs.Advanced experience with:C#ASP.NET Web API.NET Framework.NET CoreRESTful API DevelopmentExperience implementing authentication and authorization using OAuth, JWT, or similar security frameworks.Experience developing and deploying APIs through CI/CD pipelines.Strong troubleshooting, debugging, and software testing skills.Excellent communication and collaboration abilities.Preferred QualificationsExperience with Microsoft Azure.Experience using Azure API Management (APIM).Experience supporting Azure cloud integration platforms.Experience leveraging AI tools to accelerate software development and testing.Experience supporting Department of Veterans Affairs or other Federal agencies.Familiarity with Agile software development methodologies.What Success Looks LikeSecure, scalable, and reliable enterprise APIs.High-quality code following software engineering best practices.Successful migration from .NET Framework to .NET Core.Stable Azure API platform with minimal production issues.Strong collaboration across development, infrastructure, and business teams.Benefits OverviewFull-time employees are offered a comprehensive and competitive benefits package including:Paid vacation, sick leave, and holidaysMedical, dental, and vision insuranceLife insuranceShort- and long-term disability insurance401(k) retirement plan with company match and immediate vestingMilitary leaveProfessional training and developmentTuition reimbursementEmployee wellness programAnd moreEqual Employment OpportunityWe are committed to providing equal employment opportunities to all employees and applicants. Employment decisions are made without regard to race, color, religion, creed, national origin, sex, age, marital status, sexual orientation, gender identity, citizenship status, veteran status, disability, or any other characteristic protected by applicable federal, state, or local law.