Senior .NET Engineer / Application Modernization Engineer | Remote Contract Opportunity | Fastwater Staffing

<p>📍 <strong>Location:</strong> Fully Remote (Maryland, U.S.)<br> 📄 <strong>Employment Type:</strong> Contract<br> 🚀 <strong>Start Date:</strong> Immediate<br> 💰 <strong>Compensation:</strong> <strong>TBD -- based on skills and experience</strong></p> <h1><strong>Important Screening Requirements</strong></h1> <p>Due to client security requirements, candidates <strong>must be U.S. Citizens or U.S. Permanent Residents (Green Card holders)</strong> authorized to work in the United States without current or future visa sponsorship.</p> <ul> <li> Must be willing to support and work with a government client. </li> <li> Must be willing to undergo fingerprinting as part of the onboarding process. </li> <li> Must successfully complete a government background investigation (CJIS-type clearance). </li> </ul> <h1><strong>About the Role</strong></h1> <p>We are seeking a <strong>Senior .NET Engineer / Application Modernization Engineer</strong> to lead the modernization of enterprise applications and legacy systems. In this role, you will design, develop, and modernize .NET applications, migrate legacy platforms to modern architectures, and build scalable, cloud-native solutions. The ideal candidate has extensive experience with .NET development, application modernization, cloud integration, and large-scale migration initiatives.</p> <h1><strong>Key Responsibilities</strong></h1> <ul> <li> Design, develop, and maintain enterprise applications using <strong>C#</strong> and <strong>ASP.NET</strong>. </li> <li> Modernize legacy <strong>.NET Framework</strong> applications to <strong>.NET Core / .NET 8</strong>. </li> <li> Develop and maintain <strong>RESTful APIs</strong> and microservices-based applications. </li> <li> Design and integrate solutions with <strong>SQL Server</strong> and other relational databases. </li> <li> Lead application modernization and legacy system migration initiatives. </li> <li> Develop cloud-native applications and integrate solutions with AWS services. </li> <li> Modernize legacy <strong>WebForms</strong> applications and redesign database-heavy solutions. </li> <li> Support <strong>SSIS</strong> migration and application redesign efforts. </li> <li> Optimize application performance through code refactoring and architectural improvements. </li> <li> Collaborate with cross-functional teams to deliver scalable, secure, and high-quality software solutions. </li> </ul> <h1><strong>Required Qualifications</strong></h1> <ul> <li> <strong>5+ years</strong> of experience in <strong>.NET application development</strong>. </li> <li> Strong hands-on experience with: <ul> <li> C# and ASP.NET </li> <li> .NET Framework modernization to .NET Core / .NET 8 </li> <li> REST APIs and microservices architecture </li> <li> SQL Server development and database integration </li> <li> Application modernization and legacy system migration </li> <li> Cloud-native application development and AWS integration </li> </ul> </li> <li> Experience working on large-scale modernization projects involving: <ul> <li> Legacy WebForms applications </li> <li> Stored procedures and database-heavy applications </li> <li> SSIS migrations and redesign efforts </li> </ul> </li> <li> Strong understanding of software architecture, performance optimization, and code refactoring. </li> </ul> <h3><strong>Preferred Qualifications</strong></h3> <ul> <li> Experience with AWS application development or cloud migration projects. </li> <li> Experience migrating SQL Server workloads to <strong>PostgreSQL</strong> or <strong>Amazon Aurora PostgreSQL</strong>. </li> <li> Experience supporting enterprise-scale application modernization initiatives.</li></ul>