NET Software Developer - Sunnyvale CA
Sunnyvale, California
Contract
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
As part of our promise to talent, Kelly supports those who work with us through a variety of benefits, perks, and work-related resources. Kelly offers eligible employees voluntary benefit plans including medical, dental, vision, telemedicine, term life, whole life, accident insurance, critical illness, a legal plan, and short-term disability.
As a Kelly employee, you will have access to a retirement savings plan, service bonus and holiday pay plans (earn up to eight paid holidays per benefit year), and a transit spending account. In addition, employees are entitled to earn paid sick leave under the applicable state or local plan.
Click here for more information on benefits and perks that may be available to you as a member of the Kelly Talent Community.
What you didn’t know about us:
- Competitive salary
- Health, Dental and Vision Benefits
- Short/Long Term Disability and Critical Care/Illness Protection
- Life Insurance and Retirement Plans
- Employee Assistance Program
- With this position, you will get the opportunity to work with our game changing clients and further advance your already valuable experience in the telecom industry!
We are Connectors. We thrive on ‘quality over quantity’ and put in the work building strong relationships. We create connections, discover qualities, uncover skills, and place people with accuracy. We are your true partner!
We are Collaborators. You’ll be working with a wholly-owned subsidiary of Kelly and part of the Kelly Telecom division. It allows us to be as nimble and fiercely competitive as a startup while having the backing of a multibillion dollar publicly traded company which has been in business for 75 years. With direct access to hiring managers, services don’t stop at standard recruiting processes. We use our expertise to improve your application skills and provide ongoing career support.
We give 24/7 Support. We are in this together. We provide around the clock availability, competitive employee benefits, and continuously check-in to make sure things are going smoothly. Check out our Glassdoor page!
Kelly Telecom is an equal opportunity employer and will consider all applications without regard to race, genetic information, sex, age, color, religion, national origin, veteran status, disability, or any other characteristic protected by law. For more information click Equal Employment Opportunity is the law.
You should know: Your safety matters! Vaccination against COVID-19 may be a requirement for this job in compliance with current client and governmental policies. A recruiter will confirm and share more details with you during the interview process.