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New Jan 14, 2026
Adapting the Facebook Reels RecSys AI Model Based on User Feedback
We’ve improved personalized video recommendations on Facebook Reels by moving beyond metrics such as likes and watch time and directly leveraging user feedback. Our new User True Interest Survey (U...
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New Jan 12, 2026
CSS at Scale With StyleX
Build a large enough website with a large enough codebase, and you’ll eventually find that CSS presents challenges at scale. It’s no different at Meta, which is why we open-sourced StyleX, a so...
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New Dec 22, 2025
Python Typing Survey 2025: Code Quality and Flexibility As Top Reasons for Typing Adoption
The 2025 Typed Python Survey, conducted by contributors from JetBrains, Meta, and the broader Python typing community, offers a comprehensive look at the current state of Python’s type system and de...
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New Dec 19, 2025
DrP: Meta’s Root Cause Analysis Platform at Scale
Incident investigation can be a daunting task in today’s digital landscape, where large-scale systems comprise numerous interconnected components and dependencies DrP is a root cause analysis (RCA) pl...
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New Dec 17, 2025
How We Built Meta Ray-Ban Display: From Zero to Polish
We’re going behind the scenes of the Meta Ray-Ban Display, Meta’s most advanced AI glasses yet. In a previous episode we met the team behind the Meta Neural Band, the EMG wristband packaged with th...
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New Dec 15, 2025
How AI Is Transforming the Adoption of Secure-by-Default Mobile Frameworks
Meta’s secure-by-default frameworks wrap potentially unsafe OS and third-party functions, making security the default while preserving developer speed and usability. These frameworks are designed to...
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New Nov 21, 2025
Zoomer: Powering AI Performance at Meta’s Scale Through Intelligent Debugging and Optimization
We’re introducing Zoomer, Meta’s comprehensive, automated debugging and optimization platform for AI. Zoomer works across all of our training and inference workloads at Meta and provides deep pe...
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New Nov 20, 2025
Key Transparency Comes to Messenger
We’re excited to share another advancement in the security of your conversations on Messenger: the launch of key transparency verification for end-to-end encrypted chats. This new feature en...
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New Nov 18, 2025
Efficient Optimization With Ax, an Open Platform for Adaptive Experimentation
We’ve released Ax 1.0, an open-source platform that uses machine learning to automatically guide complex, resource-intensive experimentation. Ax is used at scale across Meta to improve AI models, tu...