In this episode of the Sunny Ray Show, host Sunny Ray sits down with Eric Gold, a longtime engineer and operator who has built Media Circle, a cross-platform app that helps people quickly decide what to watch across streaming services, entirely on his own. Eric explains how the rise of AI coding tools has turned solo founders into full engineering teams, letting him architect a scalable consumer infrastructure while AI handles much of the implementation. He draws on decades of experience, including co-founding IG Research, a stint at Bessemer, running the founders-focused fund Peak Opportunity Partners, and currently serving as co-CEO of Mutual Markets alongside his brother. The conversation covers how AI has collapsed the cost and time needed to reach MVP, what makes an opportunity worth pursuing without true competitors, and how Eric thinks about go-to-market for Media Circle, including influencer marketing and a daily companion trivia game called Media Mini. Eric shares that shipping was never in doubt, the real surprise was how little time coding and debugging now takes. The episode closes with where to find Media Circle and Mutual Markets.
A solo founder explains how AI coding tools let him build and ship a full streaming recommendation app alone.
Can you tell us what you're building, what problem it solves, and how you pulled it off without a team of 100 people?
I built Media Circle to solve the problem of spending 20 minutes with my spouse trying to agree on something to watch across all our streaming services. I looked at existing solutions and thought I could build something better. AI made this a builder's paradise, letting me go from idea to execution at the lowest cost and speed ever, across web, iOS, and Android.
What was the specific thing you saw at Mutual Markets that made you realize AI was changing what small teams could build?
The real leap was when models moved from general understanding into actually comprehending code. I'd been using LLMs since they were nascent, starting with BERT models for recommendations at Mutual Markets. Once AI could understand code, it became a massive productivity leap, letting me give it my own development patterns and dramatically speed up how I build.
What did your time as co-managing partner of Peak Opportunity Partners teach you about whose money you'd take today?
Our fund was thesis-agnostic, built around founders backing founders. I learned ideas themselves are rarely unique, it's really about execution across the whole stack, not just technology but go-to-market and CAC. AI now lets founders get to market faster, at lower risk, and iterate more easily since you can deploy a much smaller team to evolve the product.
As co-CEO of Mutual Markets with your brother, what has to carry both your names before it moves, and what do you decide alone?
We step in together when we see a genuinely transformative opportunity with real white space and no true competitors. Mutual Markets fit that from our prior experience at IG Research measuring TV and internet advertising effectiveness. We saw an inability to run brand marketing measurement at scale, and we were the ones best suited to actually build and run it.
How did the first thousand people who installed Media Circle actually find it, and which route surprised you most?
Honestly, we're still in that early awareness phase, and it's just me doing it. The good news is nearly everyone watches TV or streaming, Americans average about four and a half hours a day, so the problem is very real. We're getting the message out across every social platform since people are actively searching for this kind of solution.
Looking at the next 90 days of consumer growth, which channel are you giving the most time to?
Influencer marketing is where we're heading in the next 90 days, since the audience for this problem is so broad it's really about finding the right voices, not just TV and movie enthusiasts. We're also building awareness through content like Media Mini, a daily trivia game similar to the New York Times Mini, tied to Media Circle.
Media Circle has over a million lines of production code built by one person. What was the moment you knew it would actually ship?
Honestly, I never doubted it would ship. My real question was how much time I'd spend editing and reviewing code. That's been surprisingly minimal, especially once the AI learned my specific coding patterns. I still use Cursor for direct control over code structure, but I'm producing less buggy code much faster than traditional development ever allowed.
Building something daring? Sunny talks to founders like this every day. Fifteen minutes to see if your story belongs on the stage.
Claim your pre-interview