Techreport blog

Engineering Insights & Guides

The best problem-solving writing in software engineering — databases, performance, security, frontend and distributed systems, in one feed.

11,842 articles
Engineering — A year of improving Node.js compatibility in Cloudflare Workers

A year of improving Node.js compatibility in Cloudflare Workers

Over the year we have greatly expanded Node.js compatibility. There are hundreds of new Node.js APIs now available that make it easier to run existing Node.js code on our platform. This has been a major initiative for us, and we are excited to share the progress we've made.

JJasnellJasnell·September 25, 2025Engineering
Performance — Cloudflare's developer platform keeps getting better, faster, and more powerful. Here's everything that's new.

Cloudflare's developer platform keeps getting better, faster, and more powerful. Here's everything that's new.

We're making it easier for developers to build amazing things, by introducing major upgrades like external model support in AI Search (previously AutoRAG), updates to Node.js compatibility, support for larger and more concurrent container instances, and more! Plus, new tools like, transactional email, and GAed support for Workers Builds, Media Transformations, and Browser Rendering with Playwright

BIBrendan Irvine Broque, RitaBrendan Irvine Broque, Rita·September 25, 2025Performance
AI & ML — Choice: the path to AI sovereignty

Choice: the path to AI sovereignty

As governments around the world eye AI for national transformation, Cloudflare champions AI sovereignty through choice: diverse tools, data control, and no vendor lock-in. We're enabling this in India, Japan, and Southeast Asia, offering local, open-source models on Workers AI, fostering innovation.

CSCarly, Smrithi RameshCarly, Smrithi Ramesh·September 25, 2025AI & ML
Databases — R2 SQL: a deep dive into our new distributed query engine

R2 SQL: a deep dive into our new distributed query engine

R2 SQL provides a built-in, serverless way to run ad-hoc analytic queries against your R2 Data Catalog. This post dives deep under the Iceberg into how we built this distributed engine, from its metadata-driven planner to its parallel execution model.

YNYevgen, Nikita LapkovYevgen, Nikita Lapkov·September 25, 2025Databases
Security — Safe in the sandbox: security hardening for Cloudflare Workers

Safe in the sandbox: security hardening for Cloudflare Workers

Cloudflare Workers are constantly being updated to be as secure and efficient as possible. We are further hardening Workers by making use of the latest software and hardware features. We use defense-in-depth, including V8 sandboxes and the CPU's memory protection keys, to keep your data safe.

ECErik Corry, Ketan GuptaErik Corry, Ketan Gupta·September 25, 2025Security
Engineering — Announcing Cloudflare Email Service’s private beta

Announcing Cloudflare Email Service’s private beta

Today, we’re launching Cloudflare Email Service. Send and receive email directly from your Workers with native bindings—no API keys needed. We're unifying email sending and routing into a single service built for developers. Sign up for the private beta.

TGThomas Gauvin, CelsoThomas Gauvin, Celso·September 25, 2025Engineering
Frontend — Quick Hit #59

Quick Hit #59

A working draft for CSS Environment Variables is posted. Same concept as var(), but env() is a “global” variable at the document level for values the user

GGGeoff GrahamGeoff Graham·September 25, 2025Frontend
Security — Securing data in SaaS to SaaS applications

Securing data in SaaS to SaaS applications

The recent Salesloft breach taught us one thing: companies do not have visibility over data in SaaS applications. Cloudflare is committing to providing additional security tools to companies who use SaaS applications and downstream integrations.

MTMichael Tremante, Bill SobelMichael Tremante, Bill Sobel·September 24, 2025Security
Engineering — Video Streaming With the AV1 Video Codec in Mobile Devices

Video Streaming With the AV1 Video Codec in Mobile Devices

Today, Meta, Vodafone, and Google released a white paper, “Video Streaming with the AV1 Video Codec in Mobile Devices,” detailing the benefits of the AV1 codec, an advanced video compression technique, to enhance the streaming video experience on mobile devices. The white paper recommends that: Vendors of core processors (SoCs) should evaluate the adoption of […]

CWChris Wiltz·September 24, 2025Engineering
AI & ML — Intent Prototyping: The Allure And Danger Of Pure Vibe Coding In Enterprise UX (Part 1) — Smashing Magazine

Intent Prototyping: The Allure And Danger Of Pure Vibe Coding In Enterprise UX (Part 1) — Smashing Magazine

Yegor Gilyov examines the problem of over-reliance on static high-fidelity mockups, which often leave the conceptual model and user flows dangerously underdeveloped. He then explores whether AI-powered prototyping is the answer, questioning whether the path forward is the popular “vibe coding” approach or a more structured, intent-driven approach.

YGYegor GilyovYegor Gilyov·September 24, 2025AI & ML