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

11,689 articles
AI & ML — The Internet has a second audience

The Internet has a second audience

More than half the traffic reaching sites on Cloudflare is now automated, and AI agents are the fastest-growing part of it. We're giving site owners the tools to see who's visiting, decide who gets in, and charge for access.

MCMatthew ConroyMatthew Conroy·September 30, 2026AI & ML
Engineering — Summary of reading: July - September 2026

Summary of reading: July - September 2026

"Wuthering Heights" by Emily Brontë - good writing, but the protagonists are quite something. There's barely a likable character in the whole story - they are all either crazy, evil, stupid or a combination of these. It's also remarkable to consider how small the world of some people in those times was …

EBEli Bendersky·September 30, 2026Engineering
AI & ML — Using AI to chart a course for our post-quantum migration

Using AI to chart a course for our post-quantum migration

We’re building CryptoLabe, an internal AI-powered tool that discovers cryptography across our codebase, surfaces dependencies, and helps us progress toward a full post-quantum migration by 2029. Here’s what we’ve learned so far.

SGSharon Goldberg·September 29, 2026AI & ML
Security — Building a certificate authority for the whole Internet

Building a certificate authority for the whole Internet

Twelve years after launching Universal SSL, Cloudflare is applying to become a certificate authority. By combining an established root, an ACME-first approach, and Merkle Tree Certificates, we are building a post-quantum CA for the open web.

SGSteve Goldsmith·September 29, 2026Security
AI & ML — We tested our own WAF with frontier AI models. Here’s what we found

We tested our own WAF with frontier AI models. Here’s what we found

We built a WAF tester that adapted each request based on what the WAF blocked or passed. This helped us explore variations that a fixed test might miss. We ran it across six attack categories on an authorized staging environment and discovered detection gaps worth fixing. Here’s how the loop worked, what got through, and what we did about it.

VGVikram Grover·September 29, 2026AI & ML
Security — Preventing quantum downgrade attacks against IPsec

Preventing quantum downgrade attacks against IPsec

A sophisticated attacker with a quantum computer can exploit a protocol design flaw to downgrade post-quantum IPsec tunnels to classical crypto. We helped the IETF develop a transcript authentication extension to prevent these attacks.

CPChristopher PattonChristopher Patton·September 29, 2026Security
AI & ML — The road to the agentic browser: A Kitesurf update

The road to the agentic browser: A Kitesurf update

We’ve updated Kitesurf, our Workers-based browser for AI agents, with WebMCP support, improved DOM performance, and terminal-based rendering. With over 730,000 Web Platform subtests passing, agents can now navigate complex sites faster.

CMCelso Martinho·September 28, 2026AI & ML