Senior .NET Full-Stack Application Developer

ZipStaff Inc.; Clearwater (FL); On-site; USD 120,000 - 160,000; Full time

Job summary

ZipStaff Inc. is hiring two Senior .NET Full-Stack Application Developers to support a large local government/public-sector organization in the Tampa Bay area.

This on-site role requires hands-on development across legacy VB.NET/WPF/WinForms and modern Blazor web apps, plus API/service integration with WCF/REST and SQL Server. You will work across UI, application, API, and database layers, participate in CI/CD deployments, and help modernize enterprise applications.

Qualifications

• 8+ years of hands-on .NET development required.
• Strong C# and .NET Framework experience.
• Proficient in Blazor and VB.NET/WPF/WinForms as needed.
• Experience with SQL Server and REST/WCF services.

Responsibilities

• Design, develop, enhance, maintain, and support enterprise applications across the .NET stack.
• Support desktop/client-server applications (VB.NET, WPF/WinForms) and modern Blazor web apps.
• Build and integrate Blazor web apps with REST/WCF APIs and SQL Server.
• Troubleshoot production issues across UI, API, and database layers; perform root-cause analysis and durable fixes.
• Contribute to modernization efforts and CI/CD deployments using Git/TFS/Azure DevOps.

Skills

NET/C#

Blazor

VB.NET/WPF/WinForms

SQL Server

Git/Azure DevOps

CI/CD

Tools

WCF

REST APIs

Azure DevOps

Job description

Job Title: Senior .NET Full-Stack Application Developer
Location: Clearwater, FL (On-site)
Employment Type: Contract-to-Hire (W2 through ZipStaff — No C2C or 1099)

About the Opportunity:

ZipStaff is seeking two Senior .NET Full-Stack Application Developers to support and modernize enterprise applications for a large local government / public-sector organization in the Tampa Bay area.

This is a hands‑on development and production-support role. You must work across legacy Microsoft desktop / client-server apps and modern Blazor web applications — UI, application, API/service, and database. Specialists who only do web, or only do desktop, will not be a fit.

What You’ll Do:

• Design, develop, enhance, maintain, and support enterprise applications across the Microsoft .NET stack.
• Support existing desktop / client-server applications (VB.NET, WPF and/or Windows Forms).
• Build modern Blazor web applications.
• Integrate applications with WCF / REST APIs and SQL Server.
• Troubleshoot production issues across UI, application, API, and database layers.
• Perform root-cause analysis and implement durable fixes — not temporary patches.
• Contribute to application modernization.
• Work with Git and/or TFS / Azure DevOps and participate in CI/CD deployments.

Required Qualifications:

• 8+ years of hands‑on Microsoft .NET application development.
• Strong C# and .NET / .NET Framework.
• Strong hands‑on Microsoft Blazor.
• Working proficiency in VB.NET — must maintain and enhance existing VB.NET applications.
• Experience with WPF and/or Windows Forms.
• Strong Microsoft SQL Server.
• Strong WCF and RESTful APIs / web services.
• Strong Git and/or TFS / Azure DevOps.
• Working knowledge of CI/CD pipelines and deployments.
• Strong troubleshooting and root‑cause analysis across multiple application layers.
• Ability to work on‑site in Clearwater, FL.
• Must be legally authorized to work in the United States without sponsorship now or in the future.

Preferred Qualifications:

• Azure / Azure DevOps.
• Entity Framework / EF Core.
• Power BI.
• Automated / unit testing.
• Application performance tuning.
• Enterprise integration and large, complex application support.

About ZipStaff:

ZipStaff partners with leading organizations to connect skilled technology professionals with high‑impact contract opportunities. We focus on quality matches and long‑term success.