Select Page

Orange County's go-to agency for custom software and digital media

Full stack development of custom mobile apps, custom websites, desktop app development, video and audio production. We service local customers in Orange country, CA –  as well as remote customers anywhere in the US.


What We Do

Mobile Apps

With over 10 years of iOS and Android app development, and multiple apps deployed to the app stores, we have the know-how to build the app of your dreams.

Website Development

From elegantly designed sales sites, to advanced CMS with custom programming, we can bring your website to the latest standards and technology.

Cloud Services

If reliability and speed is important for your web presence, you’ll want a dedicated secure cloud server, with backup and recovery, and monitoring.  We can help!

Digital Advertising

SEO, Social Media Marketing, sales funnels, commercial production – We have the tools and knowledge to target the perfect audience and bring you business.

Custom Software

Looking for a dependable full stack software developer to supplement your team, or work solo on your next project?  Look here.


Media Production

Software is not allweI do.  Video and audio production, 3D animation, motion graphics, and Photoshop work – we have the tools and creativity to make your productions soar.


Professional Software Development for over 30 years

Hi, I’m Nathan Gopen, freelance software developer, multimedia producer, and owner of Diadem Productions. 

I’m an MIT graduate, and I’ve been writing computer
software both as a hobby since age 12, and professionally for all of my adult life. I’m a full-stack developer with many years of desktop, multimedia, web and mobile experience, and can solve any technical or creative challenge that comes my way.

I’m also an entrepreneur and business owner, and I’ve been on your side of the table more times than I can count. You’re looking for a freelancer who can understand your vision, take the initiative and think through solutions and creative concepts that you may have overlooked, and deliver results on time and within budget.

I’ve spent over 20 years working with direct and contract jobs for Fortune 500 companies, as well as many years freelancing for creative agencies or direct clients. I know how to stay organized, communicate well, stay on top of a project and get it done.

Don’t waste time and money on bottom of the barrel overseas programmers who always get it wrong, or junior programmers who just don’t have the know-how – only to have to come back here six months later and thousands of dollars poorer. Get it done right and well the first time. Let’s set up a phone call to discuss your project in detail. I look forward to gaining your trust and helping you achieve your vision.

We Create Fully Connected Systems So You Can Focus On Your Business

You shouldn’t have to spend the time or resources hiring and managing multiple different companies and developers to work on web, mobile, and backend infrastructure, and advertising/media production.  Let us be the focal point, and you keep you attention on what you do best.

Get Started


2160 Barranca Parkway #1041 Irvine, CA 92606