Senior .NET Developer responsible for leading the upgrade of a mission‑critical voter registry system from ASP.NET MVC (.NET Framework 4.x) to a modern, su

Our client is looking for a Senior .NET Developer responsible for leading the upgrade of a mission‑critical voter registry system from ASP.NET MVC (.NET Framework 4.x) to a modern, supported .NET platform.

Must-haves:

• 10+ years .NET development experience using C#, ASP.NET MVC, Razor, and SQL Server
• Proven delivery of multiple legacy .NET modernizations (.NET Framework 4.x .NET 6+ / .NET 7+)
• Strong hands-on experience with Entity Framework (EF6 and/or EF Core) and AutoMapper
• Expertise refactoring tightly coupled MVC applications with complex business rules
• Experience building and maintaining RESTful APIs
• Working knowledge of .NET Core / modern .NET architecture
• Experience using CI/CD pipelines and DevOps practices for deployment
• Demonstrated ability to mentor and upskill developers for long-term application support
• Strong skills in technical documentation, communication, and stakeholder collaboration
• Comfortable working with large, data-intensive systems (1M+ records)

Responsibilities:

• Collaborate with business analysts, solution architects, and project management to define a realistic modernization roadmap
• Lead the design and development of ROVER 2.0, aligning with modern .NET standards and best practices
• Execute the migration and refactoring of legacy ASP.NET MVC components, data access layers, and business logic
• Improve application maintainability, performance, and scalability while preserving data integrity
• Support and guide internal developers through pairing, code reviews, and knowledge transfer
• Contribute to architecture decisions, testing strategies, and deployment approaches
• Produce clear technical documentation to support long-term maintenance and enhancements