NET Software Developer – Sunnyvale CA

By myKelly | October 14, 2026

NET Software Developer - Sunnyvale CA

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Job ID: kt-888406

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Sunnyvale, CA, US

Information Technology

Contract,

On-site

Other/Non Classified

Sunnyvale, CA, US

Contract,

Other/Non Classified

On-site

Information Technology

Apply On Kelly Telecom Applied

Job details

Bring your .NET expertise to a hands-on development role supporting software used in a manufacturing and production environment. You’ll design, build, maintain, and improve Windows and web applications while working across modern .NET technologies, rich user interfaces, databases, and hardware-connected systems.

This opportunity is ideal for a developer who likes owning applications from start to finish—not just writing code, but helping shape solutions, troubleshoot real production challenges, and make systems faster and more reliable. You’ll work with C#, Blazor, WPF, WinForms, MVVM, SQL, Oracle, and automation tools while collaborating with technical teams and internal users to deliver practical software that supports daily operations.

Required Skills & Experience

· 5+ years of professional .NET development experience, preferably in manufacturing, semiconductor, or industrial environments

· Strong experience with C#, VB.NET, .NET Core, .NET 6+, .NET Framework 4.7+, and object-oriented programming

· Experience developing Windows, web, and rich user-interface applications using WPF, WinForms, Blazor, and MVVM

· Experience with LINQ, ADO.NET, design patterns, Visual Studio 2019+, Git, or Bitbucket

· Experience working with Oracle and SQL Server databases, including stored procedures

· Bachelor’s degree in Computer Science or a related field—or equivalent professional experience

Desired Skills & Experience

· Experience working with manufacturing equipment, semiconductor processes, or hardware-connected applications

· Familiarity with SEMI communication protocols, including SECS/GEM or Modbus TCP

· Experience with SPC software, NI DAC I/O, Advantech remote I/O, or serial-to-Ethernet systems

· Knowledge of microservices, MySQL, MariaDB, C, C++, or Visual Studio Code

· Scripting experience with Linux Bash, PowerShell, or Windows Batch

· Experience with Python or Java

What You Will Be Doing

· Design, develop, test, and maintain scalable .NET applications

· Build and enhance Windows, web, desktop, and front-end user interfaces

· Work with engineering and business teams to define requirements and deliver new features

· Troubleshoot, debug, upgrade, and optimize applications for performance and reliability

· Participate in code reviews, architectural discussions, and software development lifecycle activities

· Develop and maintain applications that communicate with databases, manufacturing systems, and hardware devices

Tech Breakdown

· 30% .NET Application Development and Software Engineering

· 20% Windows, Web, and User Interface Development

· 15% Database Development and Integration

· 15% Application Troubleshooting, Testing, and Optimization

· 10% Manufacturing, Hardware, and Device Integration

· 10% Code Reviews, Documentation, and Technical Collaboration

Daily Responsibilities

· Develop and maintain C# and VB.NET applications

· Build user interfaces with WPF, WinForms, Blazor, and MVVM

· Work with Oracle, SQL Server, stored procedures, LINQ, and ADO.NET

· Debug application issues and improve performance, reliability, and security

· Review code, document solutions, and participate in technical planning

· Collaborate with engineering teams and internal users to support application needs

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