Hi, I'm Daniel. Welcome to my website!

I'm a son, brother, friend, 🚴 enthusiast, software engineer, and Thiel Fellow.

In past lives I was CTO of MyEtherWallet, the first wallet to support ERC-20 tokens, and founder of Rep.ai.

I lead the Agents team at Owner building Owner Agent. I feel the AGI.

Writing

Keeping Anthropic's 1-hour prompt cache when you use the Vercel AI Gateway

Jun 22, 2026

Routing Claude through the Vercel AI Gateway can quietly shorten your prompt cache from an hour to five minutes. Here's how to spot it and how to avoid it.

Fixing "fsevents" deployment errors on Heroku

Mar 17, 2020

Experiencing issues deploying your node based web application on Heroku? Here's a potential fix!

Experiments

Luminous streamlines around a concentrating vortex

Interactive explanationNavier–Stokes: the proposed blowup, illustratedExplore the flow