Senior .NET Software Developer

We are looking for an experienced Senior .NET Software Developer to join a Long-term Contract opportunity based in Utah. This role will partner closely with a senior technical lead to evaluate legacy application customizations and help shape how essential functionality is incorporated into a modern .NET Core platform. The ideal candidate brings strong engineering judgment, enjoys working through complex application behavior, and can contribute effectively in a collaborative, low-ego team environment., * Assess legacy Web Forms application components and identify business-critical functionality that should be incorporated into the modern .NET Core solution.

• Work closely with the lead developer to review customized code paths, clarify system behavior, and recommend practical implementation approaches.

• Translate older application logic into scalable configuration patterns and maintainable features within the current platform architecture.

• Build, enhance, and support backend services using C#, ASP.NET, and related .NET technologies aligned with modern development standards.

• Develop and optimize data access layers using Entity Framework, with awareness of environments that may also include NHibernate.

• Contribute to cloud-based application delivery using Azure services, including hosted applications, database services, and containerized workloads.

• Support migration-related development efforts by helping move functionality from legacy frameworks into a more modern, service-oriented architecture.

• Partner with teammates to troubleshoot issues, improve application performance, and deliver reliable solutions that meet long-term business needs.

Requirements * 10+ years of software development experience with strong depth in C# and the .NET ecosystem.

• Hands-on experience building applications with ASP.NET, including work in both Web Forms and modern .NET Core environments.

• Proven background supporting or executing migrations from legacy Web Forms applications to newer .NET-based architectures.

• Solid experience with Entity Framework; familiarity with NHibernate is beneficial.

• Practical knowledge of Azure services such as App Services, Azure SQL Database, and cloud-based application deployment patterns.

• Experience working with Docker and containerized development or deployment workflows.

• Ability to analyze existing codebases to understand both technical implementation and underlying business intent.

• Strong collaboration skills with a proactive approach to asking questions, aligning with team members, and delivering work responsibly. Technology Doesn't Change the World, People Do.®, All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

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