Senior .NET Developer (Application Modernization & Security Remediation)

Job Title: Senior .NET Developer (Application Modernization & Security Remediation) Work Arrangement: Onsite Location: Jersey City, NJ or Chicago, IL Employment Type: Contract / FTC (Fixed-Term Contract) Engagement Type: W2 End Client: Mphasis Pay Rate: $34 per hour on W2 Experience: 8 to 12 years Position Summary Dhaka Technologies Limited Company (DTLC) is hiring a Senior .NET Developer on behalf of its client, Mphasis, for a contract / fixed-term engagement based in Jersey City, NJ, or Chicago, IL. We are seeking a Senior .NET Developer for a contract role focused on modernizing legacy applications, remediating security vulnerabilities, and supporting enterprise production environments. The ideal candidate brings 8 to 12 years of experience and strong skills in C#, .NET Framework, ASP.NET MVC, ASP.NET Core, and Web API. You will convert Classic ASP applications to .NET, resolve application security vulnerabilities and production issues, and support Windows Server migration or repave activities and production deployments.

Responsibilities

• Convert Classic ASP applications to .NET and modernize legacy applications.
• Resolve application security vulnerabilities and production issues.
• Support Windows Server migration or repave activities and production deployments.
• Execute SQL Server migrations and validate schemas, data, and connectivity.
• Integrate enterprise cryptographic and security solutions.
• Support post-quantum cryptography (PQC) readiness initiatives.
• Perform functional, regression, and post-deployment testing.
• Contribute to infrastructure modernization and provide production support.

Required Qualifications

• 8 to 12 years of experience with strong skills in C#, .NET Framework, ASP.NET MVC, ASP.NET Core, and Web API.
• Experience with Classic ASP modernization.
• Experience with SQL Server, IIS, and Windows Server.
• Secure coding, OWASP, and vulnerability remediation experience.
• Experience with production deployments.

Preferred Qualifications

• Familiarity with Azure DevOps and CI/CD.
• Cryptography or security integrations.
• Post-quantum cryptography (PQC).
• Server migration projects.

How to Apply Interested candidates should send their updated resume to talent@dhakatech.us with the job title and preferred location in the subject line. Please include your current location, work authorization status, and availability to start.