.NET Application Modernization Consultant – Staff

HIKINEX

.NET Application Modernization Consultant supporting enterprise application modernization by migrating legacy .NET Framework applications to modern .NET technologies and collaborating with cross-functional teams.

Posted 7/2/2026contractRemote • Maryland • 🇺🇸 United StatesLeadWebsite

Tech Stack

Tools & technologies

ASP.NETAzure.NET

About the role

Key responsibilities & impact

Develop and maintain applications using C#, .NET Core, and .NET 8.
Support the migration of legacy .NET Framework applications to modern .NET platforms.
Build and maintain ASP.NET Core applications using middleware, dependency injection, and configuration best practices.
Manage project dependencies using NuGet, SDK-style project files, and PackageReference.
Develop and execute automated unit, integration, and regression tests.
Review and validate code generated through AI-assisted migration and modernization tools.
Collaborate with engineering teams using Git and CI/CD pipelines to support application delivery.
Contribute to application modernization efforts while ensuring code quality, maintainability, and performance.

Requirements

What you’ll need

3+ years of experience with C# and .NET development.
Strong working knowledge of .NET Core and .NET 8, including differences from the .NET Framework.
Hands-on experience with:
SDK-style .csproj files and PackageReference
ASP.NET Core fundamentals (middleware, dependency injection, IConfiguration, appsettings.json, and the Options pattern)
NuGet dependency management and package upgrades
Automated testing using xUnit, NUnit, or MSTest, including mocking frameworks such as Moq
Integration testing
Comfortable working in AI-assisted or tooling-driven migration workflows with manual code review.
Experience using Git and CI/CD tools such as Azure DevOps or GitHub Actions.

Benefits

Comp & perks

Due to client security requirements, candidates must be U.S. Citizens or U.S. Permanent Residents (Green Card holders) authorized to work in the United States without current or future visa sponsorship.
Must be willing to support and work with a government client.
Must be willing to undergo fingerprinting as part of the onboarding process.
Must successfully complete a government background investigation (CJIS-type clearance).

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

C#.NET Core.NET 8ASP.NET CoreAutomated TestingXUnitNUnitMSTestSDK-style .csprojPackageReference