Engineering at Meta engineering.fb.com

The Death of Traditional Testing: Agentic Development Broke a 50-Year-Old Field, JiTTesting Can Revive It

engineering.fb.com·3d·

Discuss: Hacker News

Building Prometheus: How Backend Aggregation Enables Gigawatt-Scale AI Clusters

engineering.fb.com·5d

No Display? No Problem: Cross-Device Passkey Authentication for XR Devices

engineering.fb.com·1w

Rust at Scale: An Added Layer of Security for WhatsApp

engineering.fb.com·2w·

Discuss: Hacker News, r/programming, r/rust

Adapting the Facebook Reels RecSys AI Model Based on User Feedback

engineering.fb.com·4w

CSS at Scale With StyleX

engineering.fb.com·4w·

Discuss: Hacker News

Python Typing Survey 2025: Code Quality and Flexibility As Top Reasons for Typing Adoption

engineering.fb.com·7w

DrP: Meta’s Root Cause Analysis Platform at Scale

engineering.fb.com·8w

How We Built Meta Ray-Ban Display: From Zero to Polish

engineering.fb.com·8w

Zoomer: Powering AI Performance at Meta’s Scale Through Intelligent Debugging and Optimization

engineering.fb.com·12w

Key Transparency Comes to Messenger

engineering.fb.com·12w

Efficient Optimization with Ax, an Open Platform for Adaptive Experimentation

engineering.fb.com·12w·

Discuss: Hacker News

Announcing the Completion of the Core 2Africa System: Building the Future of Connectivity Together

engineering.fb.com·12w

Enhancing HDR on Instagram for iOS With Dolby Vision

engineering.fb.com·12w·

Discuss: Hacker News

Open Source Is Good for the Environment

engineering.fb.com·13w

StyleX: A Styling Library for CSS at Scale

engineering.fb.com·13w

Meta’s Generative Ads Model (GEM): The Central Brain Accelerating Ads Recommendation AI Innovation

engineering.fb.com·13w·

Discuss: Hacker News

Video Invisible Watermarking at Scale

engineering.fb.com·14w·

Discuss: Hacker News

Scaling Privacy Infrastructure for GenAI Product Innovation

engineering.fb.com·16w

Disaggregated Scheduled Fabric: Scaling Meta’s AI Journey

engineering.fb.com·16w

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