About Gwenn & du web development
About Us

Our Mission

"We listen to your needs and design solutions that serve your goals."

Yes we design software applications, but what we really provide are tools that make your work day easier and your business more efficient. At the end of the day, we want you to feel that our applications made your company better.

We understand that every company works within a budget. We work with you to maximize that budget by identifying your project’s highest priority components, thus increasing your return on investment. Our software is designed to allow for easy updates and to maintain compatibility with both third party applications and future components. Our websites adhere to the best search engine optimization (SEO) practices.


Gwenn & Du Design was established in 1998 in the San Francisco Bay Area and has been at the forefront of online application development from the beginning. We were developing websites with content management systems before most of today’s frameworks even existed. We contributed to early graphic user interface guidelines and worked with web technologies across a variety of industries.

List of expertise

  • Search Engine Optimization (SEO)
  • Full Stack .NET Framework
  • MVC, Asp.NET, Web API
  • .NET Core
  • Entity Framework
  • Azure, Amazon Web Services
  • Android, iOS
  • SQL Server
  • JQuery, Bootstrap
  • Unity 3D Engine

Gwenn & Du Design

  • Open: 24 hours
  • Serving: Antioch and nearby areas