CCC @ccc.de Der Chaos Computer Club ist eine galaktische Gemeinschaft von Lebewesen für Informationsfreiheit und Technikfolgenabschätzung. https://ccc.de
Andy Grove @andygrove.io Apache Arrow & DataFusion PMC Member. Original creator of Apache DataFusion.
Andrew Lamb @andrewlamb1111.bsky.social Apache {DataFusion PMC}, Database Internals
Pydantic @pydantic.dev The end-to-end AI engineering stack
AI observability at scale without fail with Pydantic Logfire. Iterate with Pydantic Evals. Build type-safe agents with Pydantic AI. Track costs with AI Gateway.
Columnar @columnar.tech At https://columnar.tech, we're building the future of fast universal data connectivity.
Ruoshi @ruoshiz.bsky.social computational methods for metagenomics | former Söding Lab MPI-NAT
matplotlib @matplotlib.org Python library for creating static, animated, & interactive visualizations. Chat w/ us @ https://discourse.matplotlib.org/
Sponsored by NumFocus
Prefect @prefect.io Modern workflow orchestration for data and ML engineers.
Website: https://prefect.io
Code: https://github.com/prefecthq/prefect
Slack: https://prefect.io/slack
EuroPython 2026, Kraków @europython.eu The European Python Conference - by the community & for the community.
Lysandros Nikolaou @lysnikolaou.com Python nerd with a special interest for compilers. CPython core developer. PyGreece organizer. Working @Quansight-Labs. He/him.
Gary Marcus @garymarcus.bsky.social AI and cognitive science, Founder and CEO (Geometric Intelligence, acquired by Uber). 8 books including Guitar Zero, Rebooting AI and Taming Silicon Valley.
Newsletter (100k subscribers): garymarcus.substack.com
Arthur Mensch @arthurmensch.bsky.social Co-founder and CEO, Mistral AI
Savannah Ostrowski @savannah.dev Python 3.16 & 3.17 Release Manager. Python Steering Council. Python Core Developer. Building @fastapicloud.com. Likes compilers, open source, film, physical computing + cats.
savannah.dev
github.com/savannahostrowski
@coredispatch.xyz
Ethan Mollick @emollick.bsky.social Professor at Wharton, studying AI and its implications for education, entrepreneurship, and work. Author of Co-Intelligence.
Book: https://a.co/d/bC2kSj1
Substack: https://www.oneusefulthing.org/
Web: https://mgmt.wharton.upenn.edu/profile/emollick
Sara Hooker @sarahooker.bsky.social I lead Cohere For AI. Formerly Research
Google Brain. ML Efficiency, LLMs,
@trustworthy_ml.
Dr. Kareem Carr, Ph.D. @kareemcarr.bsky.social Statistician. PhD @Harvard • Masters degree in pure math • Follow me for fun, nerdy content.
Sign up to my newsletter: kareemcarr.substack.com
Kristian Lum @kldivergence.bsky.social Research Scientist at GDM. Statistician. Mostly work on Responsible AI. Academia-industry flip-flopper.
Jeff Dean @jeffdean.bsky.social Google Chief Scientist, Gemini Lead. Opinions stated here are my own, not those of Google. Gemini, TensorFlow, MapReduce, Bigtable, Spanner, ML things, ...
Jess Hamrick @jhamrick.bsky.social Building open models @ Reflection AI. Previously: Google DeepMind, UC Berkeley, MIT. I post about: AI 🤖, flowers 🌷, parenting 👶, public transit 🚆. She/her.
Hynek Schlawack @hynek.me Pythonista & PSF fellow 🐍🏆, Gopher 🐹, blogger 📝, speaker 📢, YouTuber 📺. ❤️ nuance & outcomes, 🗣️🇨🇿🇩🇪🇺🇸
• https://hynek.me/
• https://github.com/hynek
• https://www.youtube.com/@The_Hynek
• https://mastodon.social/@hynek
• https://x.com/hynek
Micha @michareiser.bsky.social Engineer @ Astral
Prev: Biome, Facebook
Sebastián Ramírez @tiangolo.com Creator of @fastapi.tiangolo.com, Typer, SQLModel, Asyncer, etc 🚀
From 🇨🇴 in 🇩🇪
Open Source, APIs, and tools for data/ML 🤖
Building @fastapicloud.com ⚡️
@apachedatafusion.bsky.social @apachedatafusion.bsky.social Apache DataFusion is an extensible query engine written in Rust that uses Apache Arrow as its in-memory format.
antirez @antirez.bsky.social Reproducible bugs are candies 🍭🍬
I like programming too much for not liking automatic programming.
Seth Larson @sethmlarson.dev Python core developer, Security & Fellow of Python Software Foundation (@python.org) 🐍 Minnesoootan, he/him, #Python, #opensource, #security #retrogaming
🌐 https://sethmlarson.dev
@wellingmax.bsky.social @wellingmax.bsky.social 
Python Package Index @pypi.org The Python Package Index (PyPI) is the repository of software for the Python programming language. Pronounced 🥧 🫛 👁️
Chris Olah @colah.bsky.social Reverse engineering neural networks at Anthropic. Previously Distill, OpenAI, Google Brain.Personal account.
Sovereign Tech Agency @sovereign.tech Strengthening digital infrastructure & open source ecosystems in the public interest. Home of the Sovereign Tech Fund, Sovereign Tech Resilience, Sovereign Tech Fellowship, & other programs supporting critical FOSS technologies.
https://www.sovereign.tech
Karthik Nadig @kanadig.com Building Python extension and tools for VS Code. Developer Manager at Microsoft
https://github.com/karthiknadig
https://linkedin.com/in/karthiknadig/
Visual Studio Code @vscode.dev The open source AI code editor
Eleanor Boyd @eleanor-py.bsky.social Python for VS Code engineer @ Microsoft
Transit enthusiast
find me on: http://github.com/eleanorjboyd, http://linkedin.com/in/eleanorjboyd/
opinions are my own
pytest.org @pytest.org The pytest framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries.
http://github.com/pytest-dev/pytest
Also on https://fosstodon.org/@pytest
Bruno Oliveira @soliv.dev Python, Rust & C++, pytest core maintainer. Dark Souls and RPGs.
Hugging Face @hf.co The AI community building the future! 
Marcelo Trevisani @marcelotrevisani.com Enthusiastic dev, Python/C++/Rust
Core member of conda-forge
Maintainer of grayskull
Phil Elson @pelson.bsky.social Scientific Python engineer & problem solver. Builder of communities and tools, including SciTools (Iris, cartopy), conda-forge, and former maintainer of matplotlib. Working on accelerator controls at CERN.
Quansight @quansight.com Forging the bridge between enterprise innovation and open source sustainability.- T @teoliphant.bsky.social @teoliphant.bsky.social
Sebastian Raschka (rasbt) @rasbt.bsky.social ML/AI researcher & former stats professor turned LLM research engineer. Author of "Build a Large Language Model From Scratch" (https://amzn.to/4fqvn0D) & reasoning (https://mng.bz/Nwr7).
Also blogging about AI research at magazine.sebastianraschka.com.
karpathy @karpathy.bsky.social AI @ OpenAI, Tesla, Stanford
Mark Riedl @markriedl.bsky.social AI for storytelling, games, explainability, safety, ethics. Professor at Georgia Tech. Director of ML Center at GT. Time travel expert. Geek. Dad. he/him
Thomas Wolf @thomwolf.bsky.social Co-founder @huggingface
Thomas Wiecki @twiecki.bsky.social That PyMC guy
Jeremy Howard @howard.fm https://Answer.AI & https://fast.ai founding CEO; previous: hon professor @ UQ; leader of masks4all; founding CEO Enlitic; founding president Kaggle; various other stuff…
:probabl. @probabl.ai Own Your Data Science
https://probabl.ai
Hadley Wickham @hadley.nz R, data, 🐕, 🍸, 🌈. He/him.
Olivier Grisel @ogrisel.bsky.social Software engineer at probabl, scikit-learn contributor.
Also at:
https://sigmoid.social/@ogrisel
https://github.com/ogrisel
Chris Holdgraf @choldgraf.com Executive Director of @2i2c.org
🪐 Jupyter Project distinguished contributor
👬 mybinder.org and hub.jupyter.org team
📚 jupyterbook.org mystmd.org and executablebooks.org
open communities 🙌
open infrastructure 💻
open science 🧪
Vincent D. Warmerdam @koaning.bsky.social Prefer common sense over hype. Employed at @marimo.io, known for calmcode.io and koaning.io. Also working on remember.cards these days.
Posit @posit.co We make free, open-source software for data scientists like the RStudio IDE.
We're formerly known as RStudio. You can always download our open-source IDE here. https://posit.co/download/rstudio-desktop/
Yann Lechelle @ylechelle.bsky.social Cofounding Executive President and Chairman at probabl.ai, the @scikit-learn.org company. Tech exec, repeat entrepreneur, advisor, angel investor. MBA @INSEAD. Plays 🏀
Fernando Pérez @fernandoperez.org Open source, open science, AI in science for earth/ice and healthcare. IPython creator, @projectjupyter.bsky.social and 2i2c.org co-founder.
Prof @ UC Berkeley Stats, director of @ucbids.bsky.social, co-director @schmidtdse.bsky.social; LBL scientist.
Skrub @skrub-data.bsky.social skrub is a Python library to ease preprocessing and feature engineering for tabular machine learning.
Our long-term goal is to directly connect database tables to machine learning estimators.
https://skrub-data.org
https://discord.gg/ABaPnm7fDC
Jake VanderPlas @jakevdp.bsky.social Write code. Mostly Python.
scikit-learn @scikit-learn.org Machine learning in Python • Open Source
https://scikit-learn.org
Julien Chaumond @julien-c.hf.co I build tools that propel communities forward
Yoshua Bengio @yoshuabengio.bsky.social Working towards the safe development of AI for the benefit of all at Université de Montréal, LawZero and Mila.
A.M. Turing Award Recipient and most-cited AI researcher.
https://lawzero.org/en
https://yoshuabengio.org/profile/
Ian Goodfellow @ian-goodfellow.bsky.social Research Scientist at DeepMind. Opinions my own. Inventor of GANs. Lead author of http://www.deeplearningbook.org . Founding chairman of www.publichealthactionnetwork.org
Yann LeCun @yann-lecun.bsky.social Professor a NYU; Executive Chairman at AMI Labs..
Researcher in AI, Machine Learning, Robotics, etc.
ACM Turing Award Laureate.
http://yann.lecun.com
Polars @pola.rs Dataframes powered by a multithreaded, vectorized query engine, written in Rust.
Wes McKinney @wesmckinney.com Principal Architect @posit.co, GP Composed Ventures, Co-founder Voltron Data. Open source: Apache Arrow, pandas, Ibis. "Python for Data Analysis" book
Mariatta @mariatta.ca Python Core Developer. F"Yes!" 🐍🇨🇦
#PyPodcats
#PyCon US Chair 2023-2024.
PSF Fellow Member & Community Service Award recipient.
Keynote speaker.
Foodie. Traveler. Picky eater.
Opinions are mine.
#Python #PyLadies #kdrama
Shantanu @hauntsaninja.bsky.social @OpenAI since 2020. CPython core dev, making Python typing better
hauntsaninja.github.io
David Lord @davidism.bsky.social Lead maintainer of Flask, Jinja, Click, and others on Pallets. Python Software Foundation @python.org Fellow. he/they
https://davidism.com
https://github.com/davidism
https://mas.to/@davidism
Carol Willing @willingc.bsky.social Python is forever🐍
Thomas Wouters @yhg1s.bsky.social Cat owner, Release Manager for Python 3.12 and 3.13, Meta employee, Python Steering Council member. (He/him or they/them.) Primarily on Mastodon: @Yhg1s@social.coop.
Microsoft @microsoft.com AI, Cloud, Productivity, Computing, Gaming & Apps ☀️
GitHub @github.com The AI-powered developer platform to build, scale, and deliver secure software.
Mark Raasveldt @markraasveldt.bsky.social 
Tania Allard @ixek.bsky.social Director Quansight Labs
✨ MLOps, OSS, Research Software Engineering
🚀 GDE - ML @ Google | PSF fellow and vice-chair of the board of directors
Pyladies Global Council
🌱 Disability justice activist, feminist, neurodivergent, developer 
Martin Kleppmann @martin.kleppmann.com Associate Professor at @cst.cam.ac.uk, researching decentralised systems and security protocols. Advisor to the Bluesky team. Wrote “Designing Data-Intensive Applications” (O’Reilly). he/him
Our World in Data @ourworldindata.org Our World in Data is a free, nonprofit website with a mission to increase understanding of the world’s largest problems and drive informed action to solve them. Based out of Oxford University (@ox.ac.uk), founded by @maxroser.bsky.social.
Hannah Ritchie @hannahritchie.bsky.social Deputy Editor, Our World in Data
Senior Researcher, University of Oxford
Climate, energy, environment, all things data.
Max Roser @maxroser.bsky.social — Founder of Our World in Data
— Professor at the University of Oxford
Data to understand global problems and research to make progress against them.
Zarr @zarr.dev Chunked, Compressed, & Cloud-native N-dimensional arrays
See https://zarr.dev/ for more information.
Ulf Buermeyer @buermeyer.de Human Being
Co-Host, @lagedernation.org
OpenStreetMap & iOS, OpenStreets.app
Former Judge @ Berlin District Court (Landgericht)
Julia Evans @b0rk.jvns.ca programming and exclamation marks
blog: jvns.ca
zines: wizardzines.com
Lage der Nation - der Politik-Podcast @lagedernation.org Lage der Nation - der wöchentliche Politik-Podcast mit Philip Banse & Ulf Buermeyer @Buermeyer.de
Jetzt Lage-Mitglied werden und unabhängigen Journalismus unterstützen: https://lagedernation.org/plus
Freiheitsrechte.org - GFF @freiheitsrechte.org Wir gehen für die Grundrechte vor Gericht. Deine Unterstützung zählt: freiheitsrechte.org/mitmachen
konsti @konstin.bsky.social cat in your python packages • he/him
Brett Cannon @snarky.ca #Python core developer who also works on packaging; works on Python stuff at #Microsoft (although this is a personal account). Proudly #Canadian.
Gregory P. Smith @gpshead.bsky.social `def code(bugs) -> 🐜: yield from code(bugs)`
#Python Software Foundation supporter & CPython Core Dev.
Always riding a bicycle. 🚴🏻 #bikelife #bikecommuter
I'm _probably_ not really here / name-🏋️-ing #markdown
Victor Stinner @vstinner.bsky.social Maintain Python upstream (http://python.org) and downstream (RHEL and Fedora) for Red Hat. Python core developer.
Paul Moore @pfmoore.bsky.social Python core developer, pip maintainer, gamer (board and video), occasional guitarist
Anthony Shaw @anthonypjshaw.bsky.social Technical Advisor at Microsoft. PSF Fellow. Creator of VS Code Pets and other useful software
Barry Warsaw @pumpichank.bsky.social 
Carl Meyer @carljm.me Engineer at #Astral, building Python tooling in Rust. github.com/carljm
Ned Batchelder @nedbat.com Python, Boston, mathy fun, juggling, autism parenting. https://nedbat.com
Zanie Blue @zanieb.bsky.social they/them — building Python developer tools in Rust at Astral
Hugo van Kemenade @hugovk.dev Python 3.14 & 3.15 release manager, core developer, Sovereign Tech Fellow, PSF Fellow, open-source maintainer, PEP editor, NaNoGenMo organiser, winter bicycler
Charlie Marsh @crmarsh.com Building Astral: Ruff, uv, and other high-performance Python tools, written in Rust.
Alex Waygood @alexwaygood.bsky.social Software dev at OpenAI (formerly Astral) 🦀. Sometimes do freelance journalism: Guardian, Telegraph, openDemocracy. Python core dev in my spare time 🐍. Studied 🎶 a while back.
Silvio Traversaro @traversaro.bsky.social Robotics Applied Scientist
@ami_iit @iCub @IITalk .
Robotics Software @condaforge @RoboStack .
Aria Desires @gankra.bsky.social it's me, the gay cat who writes your docs~!
author of the rustonomicon and learn rust with entirely too many linked lists; worked on homestuck, rust-lang, swift-lang, firefox
she/her, trans, 30
Julian Hofer @julianhofer.eu @prefix.dev software engineer who loves languages and trains 🚅
Wolf Vollprecht @wolfvollprecht.bsky.social Working on software package management at @prefix.dev
@ruben-arts.bsky.social @ruben-arts.bsky.social