Emscripten @emscripten.org 
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
Prefix.dev - the Pixi company @prefix.dev Escape dependency hell with Pixi - your new favorite package manager!
Discord: https://discord.com/invite/kKV8ZxyzY4
Bartosz Sypytkowski @horusiath.bsky.social Yrs/Yjs core dev team. Interested in distributed systems, databases and CRDTs. Blogging: https://www.bartoszsypytkowski.com- D Thorsten Beier @derthorsten.bsky.social
Orhun Parmaksız @orhun.dev Terminal Chef 🐀
@ratatui.rs · @jetbrains.com · @archlinux
Open source: https://github.com/orhun
Livestreams: https://youtube.com/@orhundev
Ratatui @ratatui.rs A Rust library that's all about cooking up terminal user interfaces (TUIs)
https://github.com/ratatui
https://ratatui.rs
James Balamuta @coatless.bsky.social omnipresent explorer of the unknown, fashionably caffeinated informatics phd, amorous cavalier. design, build, analyze. #rstats on #macos + #webr and #python with #pyodide
Emma @emmatyping.dev Python Core Dev & Rust for CPython co-lead. mypy core team. Former quantum compiler engineer, now at NVIDIA working on Python & packaging. Opinions my own.
🏳️⚧️
https://emmatyping.dev
Masto: @emmatyping@hachyderm.io
Profile pic by Caleb Rippetoe
she/her
FastAPI Cloud @fastapicloud.com You code. We cloud.
By the team behind @fastapi.tiangolo.com 🚀
https://fastapicloud.com
mozilla.ai @mozilla.ai Open, transparent AI for real world impact. Built for developers, creators, and teams shaping what’s next.
Tim Head @betatim.bsky.social Trained scientist building software. Also: hike, bike, run, swim, ski, pizza
Chris Fonnesbeck @fonnesbeck.bsky.social Quantitative hack, PyMC Labs
Hydroclimat @hydroclimat13.bsky.social Hydroclimat est une entreprise française.
Nous avons pour #mission de résoudre les #enjeux liés à l’eau et au changement climatique.
Anticiper aujourd'hui, protéger demain : des solutions innovantes pour un futur #résilient face au #changementclimatique
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 🏀
Hadley Wickham @hadley.nz R, data, 🐕, 🍸, 🌈. He/him.
Alonso Silva @alonsosilva.bsky.social AI Researcher @ Nokia Bell Labs. Interested on Large Language Models (LLMs), Machine Learning and Data Analysis.
Riccardo Cappuzzo @riccardocappuzzo.com Research engineer at Inria Saclay, working on the Skrub library. PhD in computer science.
Python, data preparation, ML, tabular learning.
ORCID: 0000-0002-4448-2959
Hoshiyomi ☄️
https://www.riccardocappuzzo.com
https://github.com/rcap107
Rodrigo Girão Serrão 🐍🚀 @mathspp.com I'll help you take your Python skills to the next level!
Python deep dive every Monday 🐍🚀 -> https://mathspp.com/insider
Short daily drop of Python knowledge 🐍💧 -> https://mathspp.com/drops
Uwe Korn @xhochy.bsky.social 
Patrick Kidger @patrickkidger.bsky.social 🚀 Doing something new. Curing uncured diseases.
🧪 antibodies+AI, neural ODEs, open-source JAX ecosystem.
👨💻 ex-{Cradle, Google, Oxford}.
📍 Zürich, Switzerland
Kubernetes @kubernetes.io #Kubernetes: open source production-grade container orchestration management. #CNCF #K8s
@geojupyter.bsky.social @geojupyter.bsky.social 
Kirstie Whitaker @kirstiejane.bsky.social ☀️ Executive Director for @ucbids.bsky.social
💽 Previously: Director for #OpenSource Tools, Practices and Systems at The Alan Turing Institute
🌱 Founder @turingway.bsky.social
🌎 #Inclusive #Communities
💕 Solo mum by choice
Schmidt DSE at UC Berkeley @schmidtdse.bsky.social The Eric and Wendy Schmidt Center for Data Science & Environment (Schmidt DSE) builds tangible, replicable, and inclusive solutions to environmental problems. https://dse.berkeley.edu/about
Anthropic @anthropic.com We're an Al safety and research company that builds reliable, interpretable, and steerable Al systems. Talk to our Al assistant Claude at Claude.ai.
STAC @stacspec.bsky.social The STAC specification is a common language to describe geospatial information, so it can more easily be worked with, indexed, and discovered.
https://stacspec.org
@nicolasbrichet.bsky.social @nicolasbrichet.bsky.social 
🟡🐍Sviatoslove.pie♥🇺🇦#StandWithUkraine🙏 | українець на чужині @webknjaz.me https://savelife.in.ua/en
Rabbit hole explorer & serial #FOSS maintainer: @aiohttp.org, ansible-core, CherryPy, pip-tools, pypi-publish, CPython.
💘💍 @bluebirrrrd.bsky.social
🗣️🇺🇦🇺🇸
🤏🇨🇿🇪🇸
https://github.com/sponsors/webknjaz
#opensource #укрблу #укртві :wq
PyCon US @pycon.us PyCon US is a community-focused conference for Python users and developers. Join us in Long Beach, CA from May 13 - May 19, 2026!
Pyodide @pyodide.org Pyodide is an open source Python distribution for the browser and Node.js based on WebAssembly/Emscripten.
Find us at https://pyodide.org 🐍
Contribute at https://github.com/pyodide/pyodide 🤗
Also, find us on Mastodon: https://fosstodon.org/@pyodide
Julien Barnier @lapply.bsky.social 
Darren Wiens @darrenwiens.github.io Team lead, geospatial dev/honorary data science at Sparkgeo. Sharing proofs of concept and other map weirdness. Skeets my own, sadly.
PyCon DE & PyData @pyconde.bsky.social Join 1500 🐍 🤓 🦄 at our annual Python & PyData conference 23.-25.04.2025 in Darmstadt / Frankfurt. https://pycon.de
#aio-libs: aiohttp and ecosystem @aio-libs.org We maintain #asyncio libraries including @aiohttp.org and dependencies.
https://opencollective.com/aio-libs
#aiohttp #aio-libs #python
---
This account is under control of @bdraco.org, Sam Bull and @webknjaz.me.
#aiohttp @aiohttp.org Asynchronous HTTP client/server framework for asyncio and Python by @aio-libs.org.
https://opencollective.com/aiohttp
#aiohttp #aio-libs #asyncio #python
---
This account is under control of @bdraco.org, Sam Bull and @webknjaz.me.
Barry Warsaw @pumpichank.bsky.social 
Victor Stinner @vstinner.bsky.social Maintain Python upstream (http://python.org) and downstream (RHEL and Fedora) for Red Hat. Python core developer.
Josh Moore @joshmoore.bsky.social Standardizing open bioimaging data infrastructure
Technical Director – @gerbi-gmb.de
Member & Co-Founder – @image.coop
TA1 Lead – @nfdi4bioimage.bsky.social
#OSS Maintainer for @openmicroscopy.org and @zarr.dev
Sandrine Pataut @sandrinep.bsky.social Pythonista 🐍 Data Scientist 💻 @AIClubGenderMin @HumbleData👩🏻💻 Back from the other side of the Channel 🇫🇷🇬🇧 Maths • Cooking • Sport & Outdoors- She/Her
@mistralai.bsky.social @mistralai.bsky.social 
Proton @proton.me Choose a better internet where privacy is the default. Start protecting your personal information online with Proton Mail, Proton VPN, Proton Drive, Proton Pass, Proton Wallet, and Lumo: https://proton.me/
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
Deno @deno.land A modern runtime for JavaScript and TypeScript
https://deno.com
Jenny Wong (she/her) @jnywong.github.io Open Source Applications Engineer @2i2c.org 👩💻 Maths and fluid dynamics PhD 🌊 Yorkshire, UK 🇬🇧
@alexis-jeandet.bsky.social @alexis-jeandet.bsky.social 
Marcelo Trylesinski @marcelotryle.bsky.social The FastAPI Expert
Starlette & Uvicorn maintainer
🇧🇷🇮🇹🇺🇾
Jeremiah Lowin @jlowin.dev CEO @prefect.io. Building FastMCP. Mostly harmless.
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
Zarr @zarr.dev Chunked, Compressed, & Cloud-native N-dimensional arrays
See https://zarr.dev/ for more information.
Anthony Shaw @anthonypjshaw.bsky.social Technical Advisor at Microsoft. PSF Fellow. Creator of VS Code Pets and other useful software
Tin Tvrtković @tinche.bsky.social Sleep when the baby sleeps; cry when the baby cries.
M B @mbussonn.bsky.social Python Dev – If you know who I am, feel free to follow me – if not I'm probably not interesting, and a bit private.
Joris Van den Bossche @jorisvandenbossche.bsky.social Open source #python software developer and teacher. Pandas core developer. GeoPandas and Shapely maintainer. Apache Arrow PMC.
Software engineer at fused.io
Apache Arrow @arrow.apache.org Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics.
Find more at https://arrow.apache.org/
@xarray.bsky.social @xarray.bsky.social 
Pangeo @pangeo.io A community for open, reproducible, scalable geoscience. Join us at https://www.pangeo.io/
TEGNicholas.bsky.social @tegnicholas.bsky.social Open-Source Software for science at Earthmover.io, built on Pangeo.io.
One of many xarray.dev core devs. https://tom-nicholas.com/
Previously dabbled in oceanography at [C]Worthy and Columbia Uni., originally did fusion plasma physics.
QGIS @qgis.fosstodon.org.ap.brid.gy Official account of QGIS - the user friendly Open Source Geographic Information System
🌉 bridged from ⁂ https://fosstodon.org/@qgis, follow @ap.brid.gy to interact
FastAPI @fastapi.tiangolo.com FastAPI framework, high performance, easy to learn, fast to code, ready for production. 🚀
Web APIs with Python type hints. 🐍
By @tiangolo.com 🤓
GitHub: https://github.com/fastapi/fastapi
Web: https://fastapi.tiangolo.com/
Bruno Oliveira @soliv.dev Python, Rust & C++, pytest core maintainer. Dark Souls and RPGs.
NumFOCUS @numfocus.bsky.social Open Code = Better Science NumFOCUS is a 501(c)(3) nonprofit that supports and promotes world-class, innovative, open source scientific computing.
@thebetolink.bsky.social @thebetolink.bsky.social 
Raúl Cumplido @raulcumplido.bsky.social Software and stuff. Working on Apache Arrow
The PyPy Project @pypyproject.bsky.social The developers of the PyPy project: a fast, compliant, open source Python interpreter.
https://pypy.org/
https://github.com/pypy/pypy
@matti-p.bsky.social @matti-p.bsky.social 
Sylvain Corlay @sylvaincorlay.bsky.social @QuantStack.bsky.social founder
@jupyter.org maintainer
@computeparis.bsky.social organizer
ACM software system award 2017.
Sid @sid-sub.bsky.social Founder terrafloww.com, Data engineer
Loves nature, space, and geo tech
Antoine Pitrou @pitrou.net Logiciel libre / free software (core developer of @arrow.apache.org, #ApacheParquet, #Python #CPython). Engineer at @quantstack.bsky.social. Membre de l'Afis @afis.bsky.social.
(profile picture: Sophie Taeuber's lion)
Max Lenormand @maxlenormand.bsky.social Geospatial Data Scientist & Podcaster
I’m curious about the modern mapping & satellite imagery world
Podcast: https://www.mindsbehindmaps.com
Videos about maps: https://youtube.com/@maxlenormand
Tom MacWright @macwright.com bikes, runs, makes val.town, writes macwright.com, open source, geo, music, sewing and other stuff.
twitter archive: https://bsky.app/profile/archive.macwright.com
Panel @panel.holoviz.org The powerful data exploration & web app framework for Python 🐍
GridSound @gridsound.com gridsound.com is a project focused on musical creation, in a close future it will become a friendly social network where users could share their compositions
#webaudio
Compute! Paris @computeparis.bsky.social 🇫🇷 The Compute! Paris conference.
November 25-26 2026 • Sorbonne Université
CNG @cloudnativegeo.org Where geospatial data users create the future together.
Join - cloudnativegeo.org/join
aimeeb @yayyyimee.bsky.social geospatial data and cloud engineering @developmentseed.org
David Guénel @handle.invalid Amoureux du cyclisme des pionniers.
Matt Fisher @mfisher87.bsky.social He/him 🏳️🌈. Research software engineer @ UC Berkeley Schmidt Center for Data Science and Environment. Open Science / open source enthusiast. Nature lover 🌱🐕🌵🦌🌼🐦. Music lover 🎶🎹🥁🎵. Tinkerer 🛠️.
github.com/mfisher87
Dr. Chelle Gentemann @cgentemann.bsky.social Open Science Program Scientist at NASA HQ.
Some things I love: data, code, compute, AI, art, & open science.
More at: https://cgentemann.github.io/
All opinions here 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
George Stagg @gws.phd Software Engineer @ Posit working on Open Source & AI. Maths. Physics. I like making things.
Darren Burns @darren.bsky.social Software engineer 💻, fantasy book enjoyer 📚, 日本語 learner 🇯🇵
Building posting.sh, the HTTP client that runs in the terminal.
https://darren.codes
Paul “π” Ivanov - @ivanov@mastodon.sdf.org @paulivanov.bsky.social onward and awkward.
Gilles Louppe @glouppe.bsky.social AI for Science, deep generative models, inverse problems. Professor of AI and deep learning @universitedeliege.bsky.social. Previously @CERN, @nyuniversity. https://glouppe.github.io
Lorena A Barba @labarba.bsky.social Engineering professor, computational scientist, jazz buff, techie, academic writer & font geek. Faculty director of the GW Open Source Program Office.
https://lorenabarba.com
www.linkedin.com/in/lorenabarba
Charles Lowell @cogentdude.com Secretary of State
https://github.com/cowboyd
@maartenbreddels.bsky.social @maartenbreddels.bsky.social 
Iisakki Rotko @iisakki.rtko.eu Postmodern relative truth spinner.
SWE @widgetti, working mainly on Solara & PyCafe
Sanket Verma @sanketverma1704.bsky.social Open Source Scientific Software and Communities — https://bsky.app/profile/zarr.dev, https://scientific-python.org/, https://bsky.app/profile/ossci.bsky.social, and more. ;)
Past: Forensics, Dunnhumby, startups and organisations.
https://sanketverma.com/
Chris Holmes @opencholmes.bsky.social Working towards a Cloud-Native Geospatial future, through involvement in GeoParquet, Planet Labs, Taylor Geospatial Engine, Fiboa, STAC & Source Cooperative.
Tobias Gårdhus @handle.invalid Research Assistant @cphsodas.bsky.social working on @ainterviewer.bsky.social
Main research interests:
- Public conversation & attention on SoMe
- Expanding the social science toolbox
- Applied NLP
#python #linux
www.gaardhus.dk
Real Python @realpython.com Online #Python Training & Expert Community: Tutorials, Video Courses, Books, Quizzes...and More! Join 1M+ Pythonistas at http://realpython.com
Nikolay Koldunov @oceanographer.bsky.social Oceanographer, climate and ocean modeler, interested in ML for climate and LLMs. Senior scientist at AWI. Working on FESOM2 unstructured ocean model, km-scale climate modelling, data visualisation. More info: https://koldunovn.github.io/
Thomas Grainger @graingert.co.uk https://fosstodon.org/@graingert
https://twitter.com/graingert
scikit-learn @scikit-learn.org Machine learning in Python • Open Source
https://scikit-learn.org
Pierre @pierreraybaut.bsky.social Creator of Spyder (the Scientific Python IDE, http://spyder-ide.org), WinPython (the Python distribution) and DataLab (https://datalab-platform.com).
https://pierreraybaut.github.io/
Samuel Colvin @sa.muelcolvin.com Building Pydantic Logfire - uncomplicated observability for Python. Sequoia Scout.
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 ⚡️