Gonzalo Peña-Castellanos

I'm a Colombian software engineer with 11+ years of profesional experience, and entrepreneur working in Python, Typescipt and open source development. I currently work as an AI Developer at Datalayer, building tools at the intersection of Jupyter, AI, and collaborative computing. I am also a hobby climber and musician, and I co-founded Trepa, a climbing gym in Bogotá, Colombia.

Recent Posts

How I Use Claude Code: Meta Repos, Plan Persistence, and Iteration Logs — Practical patterns for AI-assisted development: meta repos for multi-project context, persisting plans in claude-plans/, and iteration logs for debugging hard bugs.
Jupyter Mimetypes for Datalayer SDK — Announcing the jupyter-mimetypes package for simplified data exchange between Jupyter kernels using Apache Arrow serialization.
Open Source and Open Science in Latin America — Exploring language localization challenges, infrastructure barriers, and community-building initiatives for open source and open science across Latin America.

Featured Projects

Datalayer for Visual Studio Code — Built the Datalayer VSCode Extension providing local and remote Jupyter Notebooks and rich executable Lexical editors. AI Copilot integration and MCP tools.
Datalayer — AI Developer building collaborative Jupyter tools with Lexical editor integration and CopilotKit-powered AI assistance for data science workflows.
conda-forge — Core contributor. Created 400+ recipes in the community-led conda package distribution.
setup-miniconda — GitHub Action for setting up Miniconda and conda environments in CI/CD workflows. Used by thousands of projects for reproducible Python environments.