Senior .NET Software Developer

Description

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.

Responsibilities:

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.

Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app and get 1-tap apply, notifications of AI-matched jobs, and much more.

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.

2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use and Privacy Notice.