AI & Product Builder

I'm Bill Prin, a San Francisco-based engineer writing the AI Engineering Report and building indie software products.

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About

Over 13 years in Google, Pinterest, and various startups, I've built everything from cloud infrastructure to ML systems. While my core work has been in engineering, I've always been deeply interested in product strategy and the intersection of technical and business decisions.

Work With Me

Projects

♠️ Live Poker Theory: my most popular project, a flashcard trainer to learn GTO (game-theory optimal) poker and GTO strategy blog.Web app written in React and native app for iOS and Android written in React Native, 5000 registered users and 200 weekly active users. I also wrote a book on GTO strategy called GTO for Live Poker and have a poker strategy Youtube.

📈 Interstitch: an app for interstitial journaling, a time-tracking tool for personal productivity.

Contact

📧 Email me at waprin@gmail.com. I enjoy hearing from readers and potential collaborators and do my best to respond to all relevant emails. (I typically reply to everyone except agency recruiters and cold sales pitches.)

Resources

Useful guides, deep dives, and reference posts from billprin.com (not on Substack).

Older Articles

I have two Substacks and the subscription box above is for AI Engineering Report. If you're interested in my writing on product, marketing, business, or general life topics, head to writing.billprin.com and subscribe.