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Website

https://opensource.facebook.com/

External link for Meta Open Source

Industry

Software Development

Company size

10,001+ employees

Headquarters

Menlo Park, California

• Meta Open Source

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  Did you know that 63% of AI training models today are built on PyTorch? When Meta first released the framework in 2016, we wanted to support training and developer experiences for AI researchers. Today, PyTorch’s mission has expanded — helping accelerate the path to AI productization for companies around the world.To learn more about what it’s like to work on AI’s leading deep learning framework, watch this short video about the project:https://lnkd.in/gE-sAw5b or read the latest Meta Career's blog post:https://lnkd.in/gQjC-BDh or

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  How PyTorch Unlocks AI Research and Productization at Scale

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• Meta Open Source

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  🚀 New Podcast Episode Alert!Are you passionate about Python typing, developer experience, or IDE tooling? Check out the latest episode of Talk Python To Me featuring the team behind Pyrefly: Meta’s blazing-fast type checker and language server for Python, written in Rust.🎙️ Episode Highlights:- How did Pyrefly come to be, and the engineering decisions behind it- An overview of powerful IDE features and typechecking capabilities- How Pyrefly is used at Meta in massive codebases like Instagram- What makes Pyrefly different from mypy and other checkers- Why we decided to be open-source from day one, with weekly releases and active community input🔗 Listen here:https://lnkd.in/g-2z3kef 🎥 Watch here:https://lnkd.in/gg2XbmnK#Python#Pyrefly#TypeChecking#OpenSource#DeveloperTools#TalkPython#Meta#Rust

  Pyrefly: Fast, IDE-friendly typing for Python talkpython.fm

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• Meta Open Source

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  🚀 New on the Meta Engineering blog: Branching in a Sapling MonorepoDiscover how Meta solved the tradeoffs between scalability and dev experience by introducing directory branching alongside full-repo branching in Sapling. Dive into the architecture, use cases, and lessons learned:https://lnkd.in/gHm67TSw

  Branching in a Sapling Monorepo https://engineering.fb.com

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• Meta Open Source

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  ⚡️OSS Project Spotlight⚡️Captum is an open source library from Meta for model interpretability in PyTorch. It helps developers understand and visualize the decisions made by deep learning models using attribution methods like Integrated Gradients and DeepLIFT.Learn more:https://captum.ai/

  Captum · Model Interpretability for PyTorch captum.ai

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• Meta Open Source

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  🚀 Big news! Today marks the formation of the React Foundation — a new home for React, React Native, JSX, and the broader React ecosystem.This move formalizes governance, ensures long-term sustainability, and brings more community, industry, and corporate collaboration under one roof. The Foundation will be part of the Linux Foundation and governed by leaders from Meta, Microsoft, Vercel, Expo, Amazon, and more. 🔗 Read more:https://lnkd.in/giTQ5eUHLet’s celebrate a new chapter for React and the open web.#React#OpenSource#WebDev#ReactNative

  Introducing the React Foundation: The New Home for React & React Native https://engineering.fb.com

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• Meta Open Source

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  🚀 Excited to introduce OpenZL, Meta’s new open source, format-aware compression framework!OpenZL uses a unique “graph model” for compression, enabling modular, high-performance codecs and a universal decoder. It delivers top-tier compression ratios and speed, with minimal CPU usage—perfect for structured data at scale.Built for rapid development and real-world production, OpenZL is already showing impressive results at Meta.Curious to make your data smaller and faster?🔗 Learn more:https://lnkd.in/gFSJh8E7📄 Read the whitepaper:https://lnkd.in/gPD7QQyF💻 Try it out:openzl.org#OpenSource#DataCompression

  Page not found - Engineering at Meta https://engineering.fb.com

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• Meta Open Source

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  How do you make sure your IDE works smoothly when your codebase has more than 20 million lines of python code? 🤔For developers at Instagram the answer is to use the Pyrefly VSCode extension 👩🏼💻Read our latest blog here about how Pyrefly can improve your IDE experience, whatever the size of your codebase:https://lnkd.in/gzhEKCBq

  Give your Python IDE a Glow-Up with Pyrefly | Pyrefly pyrefly.org

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• Meta Open Source

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  🔎 Meta Open Source 101🔎Meet Sapling, Meta’s next-gen source-control system. It’s Git-compatible but designed for massive repos and lightning-fast operations, even at Meta’s scale. Perfect if you need speed and a smooth developer experience.Learn more 👉https://sapling-scm.comWhy Sapling?• Git-compatible CLI & workflows• Blazing performance on huge monorepos• Built-in smart history rewrite & interactive rebaseYou can adopt it incrementally—use Sapling’s client while keeping your existing Git server.Getting started:1️⃣ Install Sapling (brew install sapling on macOS)2️⃣ Clone a repo: sl clone <repo>3️⃣ Work as usual—commands like sl commit, sl log, and sl pull mirror Git’s feel but are optimized for speed.Want deeper insights—architecture, scaling lessons, and Meta’s journey from Git?Check out the engineering deep dive:https://lnkd.in/g_XnESfi⚡ Faster commits, friendlier workflows—give Sapling a try today!

  Sapling from Meta | Sapling sapling-scm.com

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• Meta Open Source

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  Hello Python Developers!We’re excited to share that the 2025 Python Type System and Tooling Survey is live - and the typing community would love to hear from you! ✨You don’t need any prior experience with typing to participate - your perspective as a Python developer is what matters most.💡💻If you have 10 minutes, please take the survey - your feedback can make a real difference in helping improve Python typing for everyone.👉 Take the survey here:https://lnkd.in/eMKQHPxUThank you for your time and insights!#Python#PythonTyping#DeveloperSurvey

  Python Type System and Tooling Survey 2025 docs.google.com

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• Meta Open Source

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  Missed the Second EgoVis workshop at CVPR 2025? Catch up now on YouTube! Hear from keynote speakers @xiaolonw, @SiyuTang, and @NagraniArsha. Plus, discover the winners & honorable mentions of HD-EPIC, EPIC-KITCHENS, Ego-Exo4D, and Ego4D Challenges#EgoVis#CVPR202Link:https://lnkd.in/d37BwAJw

  Project Aria CVPR 2025 - EgoVis Workshop youtube.com

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