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Posted July 09, 2026
Robert Half

Senior .NET Developer

Jacksonville, FL 32202, US Temporary

We are seeking a Senior .NET Developer to design, develop, and support modern enterprise applications using C#, .NET, Azure, and AI-enabled technologies. This role will be responsible for building scalable backend services, APIs, cloud-based integrations, and serverless solutions using Azure Functions and other Microsoft cloud services.


Qualifications:

Requirements

  • Strong experience with C#, .NET, and .NET Core / .NET 6+
  • Experience designing and developing RESTful APIs and backend services
  • Strong experience with ASP.NET Core, Web API, MVC, or related .NET frameworks
  • Hands-on experience with Azure Functions and serverless application development
  • Experience with Azure services such as Azure App Service, Azure API Management, Azure Service Bus, Event Grid, Azure Storage, Key Vault, and Application Insights
  • Experience with SQL Server, Azure SQL, stored procedures, queries, and database design
  • Experience building integrations between internal systems, external APIs, and cloud-based platforms
  • Experience with microservices architecture, event-driven architecture, or distributed systems
  • Experience with CI/CD pipelines using Azure DevOps, GitHub Actions, or similar tools
  • Strong understanding of object-oriented programming, SOLID principles, design patterns, and clean code practices
  • Experience with Git or similar source control tools
  • Experience troubleshooting production issues and optimizing application performance
  • Strong communication skills and ability to work with cross-functional teams
  • Ability to mentor developers and contribute to technical design discussions

AI / Emerging Technology Experience

  • Experience building or integrating AI-enabled features into business applications
  • Exposure to Azure OpenAI, OpenAI APIs, Microsoft Copilot integrations, or similar AI platforms
  • Understanding of prompt engineering, AI-assisted workflows, or generative AI use cases
  • Experience with Retrieval-Augmented Generation, vector search, embeddings, or Semantic Kernel is a plus
  • Ability to evaluate where AI can improve automation, user experience, business processes, or application functionality

Compensation

Based on experience

About Us

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.

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