People

Patrick Dowell

Founder

Patrick founded Phase Six in 2008, after co-founding Strategy Mobile (2005 to 2008). He studied computer science and mathematics at Cornell University, graduating with a B.S. and M.Eng. in computer science, and co-authored research there on consistent replication for distributed systems.

At Facebook, from 2013 to 2018, he started and led the team that built MobileConfig, the configuration system behind the company’s mobile apps, published at SOSP 2015. He worked on YouTube VR at YouTube from 2018 to 2020, and architected transaction relay contracts at 0x from 2022 to 2023. At Chainlink Labs, from 2023 to 2025, he was a staff engineer and the tech lead of the EVM transaction manager. In 2025, at Coinbase, he built the USDC payment system for Shopify on Base, including an ERC-4337 bundler.

Since 2025 he has built software full time with AI coding agents, including a children’s app for the board game Go and a real-time strategy game. He lives in Las Vegas.

Email: patrick@phasesix.net

Carmen Krol

Accessibility engineering

Carmen is a software engineer with more than a decade of experience, including nearly five years on Meta’s central accessibility team, most recently as a tech lead. She now does accessibility engineering for product teams, across web, Android and iOS.

She focuses on accessibility engineering, developer guidance and tooling, and the accessibility of AI-generated software. Her recent writing audits an Android app built with Claude against WCAG 2.2 AA and follows what happened when Claude fixed the failures.

More on her site.