My wife, Catherine, and I started Jellifish to make shopping for interiors clearer. We’re starting with wallpaper. That means apples-to-apples pricing regardless of whether the manufacturer sells single rolls, double rolls, by the yard — whatever — and sorting products by how much it would cost to wallpaper your room. You shouldn’t need to make a spreadsheet or have a friend with an interior decorator’s license to wallpaper your powder room.

I’ve got an ever-growing org chart of AI agents handling product, design, engineering and more. I’m learning in public as I go and posting about it as @johnhamlin on X.

Before Jellifish, I was a senior full-stack engineer at Deutsche Bank and Buildertrend. At Deutsche Bank I worked on the first internal AI tool to hit production, and I contributed reusable skills to Buildertrend’s internal AI tools.

When I’m not working, I’m a bar trivia champion, hot sauce daredevil and kombucha home brewer. I’ll talk your ear off about reverse searing steaks, the best way to make a martini (obviously gin, almost no vermouth) and the uselessness of the Oxford comma.