Senior .NET Developer; Modernization & Security Remediation
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Software Development
.NET Developer, Backend Developer, Senior Developer
Job Description & How to Apply Below
Dhaka Technologies Limited Company | Contract
Senior .NET Developer (Application Modernization & Security Remediation)Jersey City, NJ / Chicago, IL, United States | Posted on 10/29/2026
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
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.
- 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.
- Familiarity with Azure Dev Ops and CI/CD.
- Cryptography or security integrations.
Position Requirements
10+ Years work experience(If this job is in fact in your jurisdiction, then you may be using a Proxy or VPN to access this site, and to progress further, you should change your connectivity to another mobile device or PC).