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

11,842 articles
Security — Cloudflare 1.1.1.1 Incident on July 14, 2025

Cloudflare 1.1.1.1 Incident on July 14, 2025

On July 14th, 2025, Cloudflare made a change to our service topologies that caused an outage for 1.1.1.1 on the edge, resulting in downtime for 62 minutes for customers using the 1.1.1.1 public DNS Resolver as well as intermittent degradation of service for Gateway DNS. We’re deeply sorry for this outage. This outage was the result of an internal configuration error and not the result of an attack

APAsh Pallarito, Joe AbleyAsh Pallarito, Joe Abley·July 15, 2025Security
Engineering — The Layout Maestro Course

The Layout Maestro Course

Layout. It's one of those easy-to-learn, difficult-to-master things, like they say about playing bass. Not because it's innately difficult to, say, place two

GGGeoff GrahamGeoff Graham·July 11, 2025Engineering
Distributed — Quicksilver v2: evolution of a globally distributed key-value store (Part 1)

Quicksilver v2: evolution of a globally distributed key-value store (Part 1)

This blog post is the first of a series, in which we share our journey in redesigning Quicksilver — Cloudflare’s distributed key-value store that serves over 3 billion keys per second globally. Here we discuss how we migrated from full datasets on each machine to a more scalable distributed design.

ADAnton Dort Golts, Marten Van De SandenAnton Dort Golts, Marten Van De Sanden·July 10, 2025Distributed
Databases — How TimescaleDB helped us scale analytics and reporting

How TimescaleDB helped us scale analytics and reporting

Cloudflare chose TimescaleDB to power its Digital Experience Monitoring and Zero Trust Analytics products. TimescaleDB is a PostgreSQL extension designed for real-time analytics and time series data, and it helped us reduce query latency by 5–35x and cut storage footprint by 33x.

RRobertRobert·July 8, 2025Databases
Design & UX — Design Guidelines For Better Notifications UX — Smashing Magazine

Design Guidelines For Better Notifications UX — Smashing Magazine

As always in design, timing matters, and so do timely notifications. Let’s explore how we might improve the notifications UX. More design patterns in our Smart Interface Design Patterns, a friendly video course on UX and design patterns by Vitaly — from complex data tables and nested filters to FAQs and error messages.

VFVitaly FriedmanVitaly Friedman·July 7, 2025Design & UX