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On June 12, 2025, Cloudflare suffered a significant service outage that affected a large set of our critical services, including Workers KV, WARP, Access, Gateway, Images, Stream, Workers AI, Turnstile and Challenges, AutoRAG, Zaraz, and parts of the Cloudflare Dashboard. This outage lasted 2 hours and 28 minutes, and globally impacted all Cloudflare customers using the affected services. The cause of this outage was due to a failure in the underlying storage infrastructure used by our Workers KV service, which is a critical dependency for many Cloudflare products and relied upon for configuration, authentication and asset delivery across the affected services. Part of this infrastructure is backed by a third-party cloud provider, which experienced an outage today and directly impacted availability of our KV service. ...

June 2025 marks the 11th anniversary of Project Galileo, Cloudflare’s initiative to provide free cybersecurity protection to vulnerable organizations working in the public interest around the world. From independent media and human rights groups to community activists, Project Galileo supports those often targeted for their essential work in human rights, civil society, and democracy building. A lot has changed since we marked the 10th anniversary of Project Galileo. Yet, our commitment remains the same: help ensure that organizations doing critical work in human rights have access to the tools they need to stay online. We believe that organizations, no matter where they are in the world, deserve reliable, accessible protection to continue their important work without disruption. ...

Database schema design plays a crucial role in determining how quickly queries run, how easily features are implemented, and how well things perform at scale. Schema design is never static. What works at 10K users might collapse at 10 million. The best architects revisit schema choices, adapting structure to scale, shape, and current system goals. Done right, schema design can become a great asset for the system. It accelerates product velocity, reduces data duplication debt, and shields teams from late-stage refactors. Done wrong, it bottlenecks everything: performance, evolution, and sometimes entire features. ...

By Alex Hutter, Alexandre Bertails, Claire Wang, Haoyuan He, Kishore Banala, Peter Royal, Shervin Afshar As Netflix’s offerings grow — across films, series, games, live events, and ads — so does the complexity of the systems that support it. Core business concepts like ‘actor’ or ‘movie’ are modeled in many places: in our Enterprise GraphQL Gateway powering internal apps, in our asset management platform storing media assets, in our media computing platform that powers encoding pipelines, to name a few. Each system models these concepts differently and in isolation, with little coordination or shared understanding. While they often operate on the same concepts, these systems remain largely unaware of that fact, and of each other. ...

Note: This article is written in collaboration with the Shopify engineering team. Special thanks to the Shopify engineering team for sharing details with us about their tech stack and also for reviewing the final article before publication. All credit for the technical details and diagrams shared in this article goes to the Shopify Engineering Team. Shopify handles scale that would break most systems. On a single day (Black Friday 2024), the platform processed 173 billion requests, peaked at 284 million requests per minute, and pushed 12 terabytes of traffic every minute through its edge.  ...

We’ve recently added support for the FinalizationRegistry API in Cloudflare Workers. This API allows developers to request a callback when a JavaScript object is garbage-collected, a feature that can be particularly relevant for managing external resources, such as memory allocated by WebAssembly (Wasm). However, despite its availability, our general advice is: avoid using it directly in most scenarios. Our decision to add FinalizationRegistry — while still cautioning against using it — opens up a bigger conversation: how memory management works when JavaScript and WebAssembly share the same runtime. This is becoming more common in high-performance web apps, and getting it wrong can lead to memory leaks, out-of-memory errors, and performance issues, especially in resource-constrained environments like Cloudflare Workers. ...

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> In my spare time I enjoy building Gundam models, which are model kits to build iconic mechas from the Gundam universe. You might be wondering what this has to do with software engineering. Product engineers can be seen as the engineers who take these kits and build the Gundam itself. They are able to utilize all pieces and build a working product that is fun to collect or even play with! ...

Database Benchmarking for Performance: Virtual Masterclass (Sponsored)Learn how to accurately measure database performance Free 2-hour masterclass | June 18, 2025 This masterclass will show you how to design and execute meaningful tests that reflect real-world workload patterns. We’ll discuss proven strategies that help you rightsize your performance testing infrastructure, account for the impact of concurrency, recognize and mitigate coordinated omission, and understand probability distributions. We will also share ways to avoid common pitfalls when benchmarking high-performance databases. ...