I created pandas and co-created Apache Arrow and Ibis. I'm a Principal Architect at Posit and a GP at Composed Ventures. Apache Member. I blog sometimes.

What I'm working on

roborev -- Continuous code review for AI coding agents. Reviews every commit via git hooks, catches issues while context is fresh, and can fix them autonomously. Works with Claude Code, Cursor, Copilot, Gemini, and others. Runs locally, no external infrastructure.

Positron -- A next-generation data science IDE built on VS Code, supporting Python and R.

Spicy Takes -- An archive of 20+ prolific tech writers (Paul Graham, Martin Fowler, and others) analyzed by LLMs. Every post gets a TL;DR, quotations, and a spiciness rating.

My book Python for Data Analysis (3rd Edition, 2022) covers the Python data stack -- pandas, NumPy, IPython, Jupyter. Used by hundreds of thousands of people.

  I donate at least $1000/year to NumFOCUS and encourage you to as well.