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.NET Application Modernization Consultant – Senior / Lead
Location
Maryland + 1 moreAll locations: Maryland | Virginia
Posted
3 days ago
Salary
0
Seniority
Senior
Job Description
.NET Application Modernization Consultant – Senior / Lead
HIKINEX
• Lead the .NET Framework to .NET 8+ modernization strategy across the workstream • Establish technical standards, migration patterns, and quality expectations • Make and document key architectural decisions regarding: Distributed transaction modernization (DTC replacement strategies), ASP.NET Web Forms migration approaches, WPF application disposition (retire, retain on Windows, or rewrite) • Perform hands-on modernization of the most complex application components • Lead remediation of incompatible NuGet dependencies and package modernization efforts • Reverse-engineer and replace private packages where source code is unavailable • Review and approve modernization work completed by staff consultants • Ensure functional parity, maintainability, and performance of migrated applications • Evaluate where modernization tooling can accelerate delivery versus where manual intervention is required • Partner with delivery leadership to identify risks, dependencies, and mitigation strategies
Job Requirements
- Core .NET Modernization Expertise
- Expert-level C# development experience using modern language features
- Extensive hands-on experience migrating applications from: .NET Framework, .NET Core, .NET 6 / 7 / 8
- Deep understanding of runtime and Base Class Library (BCL) differences between framework versions
- Project & Solution Modernization Experience converting: Legacy project formats to SDK-style projects, packages.config to PackageReference, Legacy solutions to multi-targeted architectures
- Strong understanding of: Target Framework Monikers (TFMs), .NET Standard, Shared library modernization
- Configuration Modernization Experience migrating: web.config, app.config, ConfigurationManager
- To: IConfiguration, appsettings.json, Options Pattern
- ASP.NET Modernization Extensive experience migrating: ASP.NET MVC, ASP.NET Web API
- To: ASP.NET Core, Kestrel, ASP.NET Core Middleware Pipeline
- Experience replacing legacy dependency injection frameworks
- Strong understanding of: Global.asax to Program.cs migration, Startup modernization, HttpContext API changes
- Legacy API & Framework Remediation Experience modernizing or replacing: BinaryFormatter, .NET Remoting, AppDomain-based implementations
- Specialized Modernization Challenges
- Distributed Transactions & DTC Modernization Experience redesigning TransactionScope and MSDTC-based systems
- Strong understanding of: Saga patterns, Outbox patterns, Idempotency, Eventual consistency
- ASP.NET Web Forms Modernization Experience migrating or rewriting Web Forms applications using: Razor Pages, ASP.NET MVC, Blazor
- WPF Modernization Experience assessing modernization strategies for WPF applications
- Ability to evaluate options including: Retention on Windows, Migration to web technologies, Avalonia, .NET MAUI
- NuGet & Dependency Modernization Experience replacing unsupported or incompatible NuGet packages
- Ability to analyze and reverse-engineer private package dependencies when source code is unavailable
- T4 Template Modernization Experience converting T4-based solutions to: Roslyn, Source Generators, Mono.TextTemplating
- Tooling & Delivery Experience Hands-on experience with: .NET Upgrade Assistant, AWS Porting Assistant for .NET, try-convert, .NET API Portability Analyzer (apiport), Git, Azure DevOps, GitHub Actions, Automated build, test, and deployment pipelines
- Additional experience with: Linux-targeted .NET workloads, Containerization concepts and deployment considerations
Benefits
- Important Screening Requirements
- Must be U.S. Citizens or U.S. Permanent Residents (Green Card holders) and able to work in the United States without current or future visa sponsorship
- Undergo fingerprinting as part of the onboarding process
- Successfully complete a government background investigation (CJIS-type clearance)
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