Company blogs

What today's software owes to Bronze Age clocks

Admission controls in software determine what does or doesn't happen next, and the most common implementation has ancient roots.

GitHub Engineering·Brian Celenza

Building Git infrastructure for agent-scale development

We're rebuilding GitHub's Git infrastructure while GitHub keeps running, creating a foundation for agent-scale software development.

The Cloudflare Blog·Sebastiaan Neuteboom

The keys to the Internet change on October 11. Are you ready?

On October 11, 2026, the DNS root switches to a new key-signing key (KSK-2024). Learn what this means for you, and how RFC 8509 trust anchor sentinels allow you to test whether your DNS resolver is ready for the rollover.

The Airbnb Tech Blog·Zuofei Wang

Beyond synthetic testing: Capturing and replaying real database workloads at Airbnb

How we capture real production database traffic at Airbnb and replay it offline to load-test, plan capacity, and de-risk upgrades. By: Zuofei Wang, Erluo Li Introduction At Airbnb, MySQL-compatible databases are a critical backbone of our online database infrastructure: a fleet…

Pinterest Engineering

Metrics Board: Building an Agent-ready Metrics Layer

Michele Ceccacci; Software Engineer I | Jason Coffman; Sr. Software Engineer | Colm O’Shaughnessy; Software Engineer II | Laura Palmer; Staff Product Manager | Adam Podraza; Manager, Engineering | Surya Karri; Manager, Engineering At Pinterest, reliable and trustworthy metrics…

NTS: Authenticated Time at Meta

Meta’s public time service now speaks NTS (Network Time Security, RFC 8915) at nts.meta.com. Packets are authenticated, so a device can verify the time came from us and was not modified on the way. Our NTS servers hold no per-client state. Cookie keys are derived, not stored and…

Smarter personalization: How property data helps us understand user price sensitivity

Introduction Existing systems estimate user price sensitivity primarily from spending behavior or demographic proxies. They do not systematically account for residential property values, which can indicate a user’s financial circumstances. This omission creates three…

Building and testing a config management orchestrator for Windows

The following is part of a series of posts about 2026 summer intern projects—for more, see “What the interns have wrought, special jumbo 2026 edition”

Introducing Dedicated Read Replicas for Postgres

Use dedicated read replicas to isolate read-only workloads and distribute your data across data centers around the world.

The Cloudflare Blog·Carlos Armada

Everything we launched during Birthday Week 2026

We celebrated our 16th birthday with 46 announcements across open source, post-quantum security, AI agents, and developer platform upgrades. Here’s a day-by-day roundup of everything we shipped.

The Cloudflare Blog·Kelly Russell

One year later: the power of 1.1.1.1 interns

A year after announcing our goal to hire 1,111 interns, more than 750 early-career builders have shipped real products across 48 teams at Cloudflare. From Birthday Week launches to post-quantum security, our interns prove that AI amplifies human potential instead of replacing it.

Scaling and benchmarking a critical message bus using a new indexing strategy

The following is part of a series of posts about 2026 summer intern projects—for more, see “What the interns have wrought, special jumbo 2026 edition”

Powering AI-led research through simulation

The short story Consider a Friday evening. A food order arrives from a mall in the city center. One driver is nearby; another is finishing a drop-off and will be available shortly; a second order from the same mall may or may not appear in the next two minutes. Dispatch the…

The Cloudflare Blog·Nevi Shah

8 major updates to Cloudflare Observability

Cloudflare is launching eight major updates that bring logs, traces, analytics, alerts, dashboards, querying, and telemetry export into one observability platform, with simpler and more predictable pricing.

The Cloudflare Blog·Willi Geiger

Streamline: custom video pipelines with Cloudflare Stream and Workers

Streamline demonstrates how to build long-running, continuous video processing pipelines by pairing Cloudflare Workers and Durable Objects with a containerized media engine.

How recurring network maintenance exposed 6 bugs

Jane Street does a lot of network maintenance over the weekends. In each maintenance, a cabinet may lose connectivity for 15 to 25 minutes. Our internal Kafka infrastructure is supposed to be resilient to these partitions, and reconnect when connectivity resumes. For several…

Results from the ASIC puzzle

ShopGym: Realistic, reproducible sandboxes for shopping agents

ShopGym creates realistic online stores and generates shopping tasks based on each store’s products and features. Developers can then repeatedly test shopping agents under consistent conditions.

A resilient kernel log reporter

The following is part of a series of posts about 2026 summer intern projects—for more, see “What the interns have wrought, special jumbo 2026 edition”

Designing Neki for performance

How Neki only decodes the parts of a PostgreSQL result the router actually needs.

How we extended Apache DataFusion to execute one query across many machines

Learn how Datadog built Distributed DataFusion to scale interactive Apache DataFusion queries across multiple machines.

How we built an async-aware Python profiler

Learn how we made Python profiling async-aware while reducing profiler overhead and preserving context across asyncio tasks.

The Airbnb Tech Blog·Wei Jiang

Personalization without user identity

How Airbnb uses proximity signals to personalize without relying on individual user history. By: Wei Jiang, Bin Xu, Bharathi Thangamani, Weiwei Guo, Sundar Srinivasavaradhan, Tracy Yu, Huiji Gao, Swapnil Ghike, Michael Kinoti Great personalization starts with knowing your user…

That Which We CAN Do: Sustainability in a World of AI

As computing use grows, so does its environmental footprint. While hardware and software have become significantly more efficient, AI demand is growing even faster, outpacing those efficiency gains and increasing the overall environmental impact of computing. What’s more…

Evolving our calendar assistant Reclaim to be AI-native without starting over

How we redesigned Reclaim for AI and natural-language requests while preserving the scheduling experience people rely on.

Handling hot shards

What makes a good sharding strategy today might not work so well tomorrow. What happens when you have one tenant hitting your database orders of magnitude more than any other? Or product managers knocking down your door with new requirements? If you're already on Neki…

Netflix TechBlog

Trading a Cloud Identity for Your Own: Workload Attestation on Managed Compute

By Dhruv Pratap Introduction Organizations that have been around for a while usually run two identity systems side by side. One belongs to the cloud provider: IAM roles, instance profiles, execution roles. The other is your own, and it is the one your internal services actually…

Pinterest Engineering

Partition Finalization in Pinterest’s Next-Generation DB Ingestion Framework

Qianrui Zhang | Sr Software Engineer, Logging Platform Kanchi Masalia | Software Engineer II, Stream Processing Platform Liang Mou | Sr Staff Software Engineer, Logging Platform Yi Pan | Principal Engineer, Agent Platform Introduction This is the third post in our series on…

GitHub Engineering·Josh Black

Improving site performance by shipping more CSS

How we fully migrated github.com away from CSS-in-JS.

When to choose x86-64 vs aarch64

ARM and x86 can give you different performance at the same vCPU count. Here's what differs, what to measure, and how to choose.

Automated merchant review summary system with integrated feedback

Introduction Merchant reviews contain useful details about food quality, portion size, packaging, and value. Finding these details often requires reading many comments. Aggregate ratings simplify comparisons, but they do not explain what shaped each score. We built the Automated…

Bringing Private Processing to Meta AI Glasses

We believe glasses are the best form factor for having AI help throughout your day. They can understand your personal context better than other kinds of devices and keep you present without picking up a mobile phone. Most of the time, glasses are helping you see well, protecting…

GitHub Engineering·Alberto Gimeno

Rendering huge pull requests in the GitHub Copilot app

How we rebuilt the diff surface in the GitHub Copilot app to open a million-line pull request with hundreds of inline review comments.

Dropbox CTO Ali Dasdan on moving from AI adoption to transformation

Meaningful AI gains depend on rethinking workflows, measuring real outcomes, and keeping human judgment at the center of how work gets done.

Helix: The internal tool powering our Shopify app's native migration

We built Helix to help LLMs rebuild the Shopify app in Swift and Kotlin, using small checkpoints and strict quality gates to keep the code shippable.

Open-Sourcing Rebalancer: A Generic, High-Performance Library for Solving Assignment Problems

We’re open-sourcing Rebalancer, the assignment-problem solver that has been used to solve resource allocation problems throughout Meta for over nine years. Rebalancer separates several related concerns: how to specify an assignment problem, how to store it efficiently in memory…

Introducing our new Dropbox API documentation

Learn about the newly launched version of the Dropbox API documentation and its modern design and features.

Inside Petal: Building the World’s First Petabit-Class Transoceanic Subsea Cable

Petal, the next step in Meta’s subsea innovation, will be the first subsea cable to deliver petabit capacity at transoceanic distances, connecting France and the United States over approximately 7,000 km (4,300 mi). Expected to enter service in 2029, it will be the first subsea…

Netflix TechBlog

Leave the Class Path in the Rearview Mirror

Introducing composable, module system native and agent friendly command line tools for modern Java development By Danny Thomas, JVM Ecosystem Team Recent work on the Java language to pave the on-ramp has made it easier than ever to start a Java program and evolve it using the…

The Airbnb Tech Blog·Pengyu Hou

The guest journey, updated in real time: extending Airbnb’s sequence recommender with Chronon

How two new Chronon capabilities, Push Mode and NRT Model Transform, allows us to provide more relevant search results instantly as a guest explores, rather than waiting for the next batch run. By: Pengyu Hou, Yuli Han, Daochen Zha, Haozhen Ding, Xin Liu, Sophie Wang, Pallavi…

Pinterest Engineering

Beyond Two Towers: Launching the 3-Tower Engagement Co-Train Model (Part 2)

Authors: Longyu Zhao (Staff Machine Learning Engineer), Gwendolyn Zhao (Staff Machine Learning Engineer), Peng Yan (Senior Machine Learning Engineer), Yuanlu Bai (Senior Machine Learning Engineer), Yuan Wang (Senior Machine Learning Engineer), Yao Cheng (Staff Machine Learning…

Worker Backpressure (Part 1)

How we taught Canva's queue workers to slow down when dependencies fail, then speed back up on their own.

AI Changed How Spotify Builds. What We Learned (and Fixed) About Quality at Higher Velocity

Quality and reliability have always been a point of pride for Spotify. We run an extraordinarily complex...

The Airbnb Tech Blog·AirbnbEng

Beyond the model: Engineering AI infra with scientific judgement

How Airbnb’s agent harness transforms unstructured data exploration by encoding scientific methodology into scalable, reproducible, and audit-ready infrastructure. By: Wren Dougherty Ask a coding agent to analyze 100,000 customer support conversations and within minutes you’ll…

Pinterest Engineering

Evolving Pinterest’s Embedding Retrieval Platform

Authors: Bowen Zhou | Staff Software Engineer; Shan Gao | Senior Software Engineer; Jingwen Hu | Software Engineer II; Wenjiang Chu | Staff Software Engineer The Billion-Embedding Challenge At Pinterest, the “signal” is our lifeblood. Whether it’s a home decor enthusiast finding…

Pinterest Engineering

Building Pinterest’s VLM Serving Stack on NVIDIA Dynamo

Lei Pan | Senior Software Engineer; Salina Wu | Senior Software Engineer; Cristian Lopez | Software Engineer I; Guangtong Bai | Staff Software Engineer; Soam Acharya | Principal Engineer; Saurabh Vishwas Joshi | Principal Engineer; Chia-Wei Chen | Staff Software Engineer; Ambud…

Lyft Engineering·Manjunath Shettar

Refreshing the Travel-Time Map Behind Lyft’s Marketplace: Rebuilding Neighborhood Reachability…

Refreshing the Travel-Time Map Behind Lyft’s Marketplace: Rebuilding Neighborhood Reachability Signals Every time Lyft calculates pricing to balance a market, nudges a driver toward an under-served pocket of a city, or paints a heatmap of where demand is building, there is a…

Migrating Shop app from React Native to native

We migrated the Shop app from React Native to Swift and Kotlin. Assisted by AI, the team was able to go from a proof of concept to a fully rebuilt native app published in the app stores in just 12 weeks.

Native is now the future of mobile at Shopify

Coding agents changed what it costs to build mobile apps twice. Here’s why Shopify is moving from React Native back to Swift and Kotlin.

Why Spotify Is Not Using Bayesian A/B Testing

Clearing the confusion about what Bayesian A/B testing is.

Portal by Spotify cut my Claude Code token usage by 90%

Most of what an AI coding agent does for me isn't thinking. It's I/O.

ZGateway: Learnings from Putting a Proxy in Front of ZippyDB

We’re introducing ZGateway, the proxy we are using to unify traffic through ZippyDB, Meta’s most widely-used key value store. As a bonus, it also enables admission control, load balancing, cross-region resilience, and richer operations. ZippyDB is the most widely used key value…

Your Agent Speaks MCP. Give It a Computer.

Sprites are disposable cloud computers. They appear instantly, always include durable filesystems, and cost practically nothing when idle. They’re the best and safest place on the Internet to run agents and we want you to create dozens of them. Sprites are a place to run agents…

GitHub Engineering·Erik Kristensen

How we make AI coding more cost efficient without sacrificing task quality

Why shorter outputs can cost more, and how GitHub Copilot reduces wasted work across the complete coding task.

How River takes security work from a fix to merge

River, Shopify’s AI agent in Slack, enables autonomous vulnerability remediation, not just detection.

Making Rust observability reliable at scale with OpenTelemetry

Learn how Datadog improved Rust tracing by building an opinionated OpenTelemetry-based library to help ensure consistent sampling, propagation, and trace quality at scale.

Lyft Engineering·Maheep Myneni

Rerouting the Stream: How Lyft Moved to the Apache Flink Operator

Written by Maheep Myneni, Arda Kuyumcu, and Prem Santosh Udaya Shankar at Lyft. Why We Migrated: Technical Debt Meets Modern Streaming Demands Over the past several quarters, Lyft’s Streaming Compute team retired our internally developed Flink Kubernetes operator and moved our…

Testing cookie behavior across hundreds of web surfaces with our in-house auditor

Our cookie auditor acts like a privacy-conscious user by visiting web pages and checking that they only load cookies consistent with that user’s preferences.

Netflix TechBlog

MAPS: Netflix’s Multimodal Asset Personalization at Scale

By Emma Yanyang Kong, Aditya Deshpande, Asad Abbasi, Bowei Yan, David Fagnan, Ashish Rastogi, Dhaval Patel, Ray Zhang Introduction The Netflix experience is a journey of discovery. Every visual cue, from the artwork on a title to the video previews that autoplay while you…

Data Mesh at Grab (Part III): Operationalizing data reliability with automated DPIs

Introduction In the first two parts of this series, we described how Grab approaches data mesh through the Signals Marketplace: a way for teams to publish, discover, and reuse trusted data products across domains. Part II introduced the foundational tools behind certification…

The Airbnb Tech Blog·Adam Bloomston

Project Lighthouse — Part 3: Introducing project-lighthouse-anonymize

Project Lighthouse — Part 3: Introducing project-lighthouse-anonymize The data in Project Lighthouse is powered by privacy-preserving anonymization code. We’ve put this code into open source, and published two new technical papers detailing the scalable algorithms and data…

GitHub Engineering·Taarik Ashenafi

Your alt text passes automated checks. That doesn’t mean it’s any good.

We built a plugin for the GitHub Accessibility Scanner to make sure your alt text is actually accessible. Here's how it works.

Netflix TechBlog

A Tale of Two Flink Autoscalers

Samuel Yeboah, Francesco Di Chiara and Mingliang Liu Today, Netflix runs two Flink autoscalers. That is exactly one more than we want. We built the first one in-house years ago, when there was no mature option suited to our platform. The second came from the Apache Flink…

Building Jarvis Pro: Route first, answer later

Introduction The first Jarvis Pro prototype could produce answers that sounded right. That was the problem. One early answer looked polished: it named the merchant, summarized the week, and recommended pushing promotions before the next review. It was also wrong. The merchant’s…

20× the CI traffic without getting slower: How we rebuilt Git serving at Datadog

Learn how Datadog built gitretriever to handle 20× more CI Git traffic while maintaining low latency and reducing backend CPU usage.

Improving infrastructure efficiency for growing demand in the age of AI

As demand for AI continues to grow, so does the infrastructure needed to support it.

When Can LLMs Replace Humans in A/B Tests?

TL;DR: LLM predictions can stand in for human outcomes in A/B tests, but only by assumption, not by design....

How we improved APM Java startup by encoding a prefix trie as a JVM constant

Learn how the Datadog APM team improved Java startup performance by encoding a prefix trie as a JVM string constant.

Netflix TechBlog

How and Why Netflix Built a Real-Time Distributed Graph: Part 3 — Querying the graph with gRPC…

How and Why Netflix Built a Real-Time Distributed Graph: Part 3 — Querying the graph with gRPC execution API Authors: Nilesh Mishra and Ajit Koti This is the third entry of a multi-part blog series describing how we built a Real-Time Distributed Graph (RDG). In Part 1, we…

Kafka App? There’s a Skill for That

Etsy is home to over 100 million listings from 5.6 million active sellers. Because the items for sale are unique and creative, there is no standard product catalog that tells us what they are. When someone searches for “light linen dress for summer,” our models must infer what…

Indexing the Data Lake for Online Point Queries

Companies like Spotify need vast quantities of data accessible at low latency for online services and,...

Turn And Face The Strange

We’re Fly.io, a public cloud platform that is both our favorite way to put an app on the Internet and our favorite way to safely let a frontier agent coding harness cook. This is a post about our company, the future, and Sprites, which are computers for agents that you can check…

Session revocations at scale

How Canva keeps hundreds of millions of user sessions fast and secure

Slack Engineering·Archie Gunasekara

Shipyard: How We Built Slack’s Next-Generation EC2 Platform

Over the past few years, we’ve been on a journey to modernise how we run Amazon Elastic Compute Cloud (EC2) instances at Slack. In our first post, Advancing Our Chef Infrastructure, we shared how we moved from a single Chef stack to a resilient, multi-stack setup with versioned…

Lyft Engineering·Sagarbaronia

From Day 1 to Production: Building Lyft’s Analytics & Rides Intelligence Assistant as Onboarding…

From Day 1 to Production: Building Lyft’s Analytics & Rides Intelligence Assistant as Onboarding Project Written by Sagar Baronia at Lyft. A Different Kind of Day One Most onboarding journeys follow a familiar arc: orientation sessions, benefits enrollment, setting up your…

Slack Engineering·Sergii Gorbachov

Agentic Testing: Where Agents Fit in the E2E Testing Stack

Abstract Agent-driven end-to-end (E2E) tests add a new exploratory layer to testing, but should they replace traditional deterministic tests? We ran more than 200 agentic E2E workflows using the Playwright MCP, Playwright CLI, and agent-generated Playwright tests in test…

Lyft Engineering·Iraklikhorguani

Metric Semantic Layer: How Lyft Governs and Scales Key Data Definitions

Written by Rohit Channe and Simran Mirchandani at Lyft. Motivation At Lyft, data isn’t just a resource — it’s woven into everything we do. Metrics drive key forecasts, steer operational decisions, and put our boldest hypotheses to the test. But as Lyft scaled, products launched…

Lyft Engineering·Atulgupta

From Chaos to Clarity: How We Built a Unified, Self-Routing Support Ops Ticketing System at Lyft

Written by Atul Gupta, Analytics Manager — LUS Support Ops, Lyft At Lyft, getting operators and riders connected quickly and reliably depends on more than technology — it depends on the teams working behind the scenes to keep that technology running smoothly. For the operators…

Building Agents that Don't Break Themselves

Building agents is fun. Rebuilding agents that break themselves… less so. A lot of Fly people are building agents with less of a penchant for self-destruction by teaching their agents to do anything risky in a Sprite. You get an agent that stays alive long enough to actually use…

Slack Engineering·Shaurya Kethireddy

Slack AI: The Path to Multi-Cloud

In early 2023, Slack faced a foundational challenge: serving Large Language Models (LLMs) at enterprise scale with the security, reliability, and performance our customers expect. Over three years, we evolved from basic infrastructure to orchestrating a sophisticated multi-cloud…