Self-taught programmer. 35+ years of production code. Still shipping.
I created 📈 yfinance and other open-source tools used by millions of developers — 30M+ downloads per month w/ 50K+ GitHub stars. I wrote 📚 Production-Grade Agentic AI, the handbook for autonomous systems that actually hold up in production.
These days I'm building 🧠 MUXI (open-source infrastructure for AI agents) and Cloop (autonomous engineering control plane), and running 🏢 Automaze (CTO-as-a-Service, 92% retention) and VarOps (systems-level advisory for companies building with AI).
I host 🎙️ Old School; New Tech and write 💌 Code Daddy — a newsletter for developers, indie makers, and solo entrepreneurs.
- 📈 yfinance (20M downloads/mo) - the most popular financial market data library
- 📊 quantstats - the #1 Python library for portfolio analytics
- 💻 ccpm - spec-driven development for AI agents
- 🛣️ vibeproxy - use your Claude / ChatGPT subscriptions with any coding agent
- 👻 muxi-ai - infrastructure for production-grade AI agents
- 💮 proof - visual proof of work for automated code changes
- 🔫 minigun - self-hosted email sender on top of Mailgun and Cloudflare
- 💬 imsg-relay - turn any Mac into a programmable iMessage gateway
- 📧 mailgent email infrastructure for AI agents
- 🐘 tiny - zero-config, batteries-included PHP framework