A reading room for system design

How the hardest systems are actually built.

A curated archive of engineering writing from Netflix, Meta, AWS, Cloudflare, Stripe, and others — distilled into concepts, patterns, and systems you can actually cite.

1,858Articles read

608Distilled

3,101Concepts

2,008Patterns

1,764Systems

40Companies

Start here

• Concept

  Control Plane / Data Plane Separation

  The single most-cited pattern in the corpus: keep the fast path independent from the thing that configures it.

• Concept

  Observability

  Logs, metrics, traces — and the unresolved debate about what belongs in each.

• Concept

  Write-Ahead Logging

  How databases, message queues, and filesystems all survive crashes the same way.

• Concept

  Eventual Consistency

  What you actually get when you scale a read-heavy system past one region.

• Concept

  Backpressure

  Unbounded queues are the most common production bug. This is how systems push back.

• Concept

  Tail Latency at Scale

  Why the p99.9 matters more than the mean, and the hedged-request playbook for taming it.

• Concept

  Blast Radius

  The discipline of designing so a single failure doesn't take everything with it.

Latest additions

1. 2026-08-03Cloudflare Workers and Containers now support inbound TCP connections and gRPCCLOUDFLARE
2. 2026-07-31Don't stop early: Case-folding source code at memory speedGITHUB
3. 2026-07-30GenRec: Towards LLM-Native Recommendation at Netflix
4. 2026-07-31Cloudflare — An API for MoQ: provision your own isolated relaysCLOUDFLARE
5. 2026-07-30Dogfooding at scale: migrating cdnjs to Cloudflare's Developer PlatformCLOUDFLARE
6. 2026-07-29Single-query scaling in Redpanda SQL on 1TB
7. 2026-07-29Post-quantum authentication to origins is now supportedCLOUDFLARE
8. 2026-07-29Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a MonthATLASSIAN
9. 2026-07-28Scaling StreamHub: Transitioning from Kinesis to Kafka for 145 Billion Daily EventsATLASSIAN
10. 2026-07-29Natural disasters and government interference: examining Q2 2026's major Internet disruption eventsCLOUDFLARE
11. 2026-07-29We're open sourcing our privacy proxy CLICLOUDFLARE
12. 2026-07-28How Databricks manages its own coding agent spend with Unity AI Gateway BudgetsDATABRICKS

Browse

• Reference

  Concepts — 3101

  The primitives: CAP, WAL, consistent hashing, backpressure, leader election.

• Reference

  Patterns — 2008

  Repeatable solutions: circuit breaker, sidecar, saga, event sourcing, outbox.

• Reference

  Systems — 1764

  Named systems in production: Dynamo, Kafka, Spanner, Borg, Colossus.

• Primary source

  Sources — 608

  Every ingested article with full metadata, tags, and backlinks.

How this works

An ingestion pipeline pulls engineering blog posts from ~30 company feeds, de-duplicates them, and runs each through a curator agent that distills the piece into structured notes and cross-links it against the existing concept graph. See the overview for the full methodology and corpus stats.

The LLM-readable catalog mirrors every page for agent consumption.