Engineer’s Codex

Diving into Claude Code's Source Code Leak

Engineer’s Codex is a publication about real-world software engineering.

Apr 1 • Engineer's Codex

182

2

27

December 2025

Everyone is a Staff Engineer Now

Engineer’s Codex is a newsletter about real-world engineering.

Dec 22, 2025 • Engineer's Codex

90

9

3

September 2025

How to Write "Garbage Code" (by Linus Torvalds)

Linus Torvalds, Creator of Git and Linux, on reducing cognitive load

Sep 12, 2025 • Engineer's Codex

461

57

52

May 2025

How Cursor Indexes Codebases Fast

Merkle Trees in the real world

May 10, 2025 • Engineer's Codex

191

2

23

March 2025

Metric-Driven Development and The Claude Effect

Sometimes, feels have to be trusted over figures

Mar 9, 2025 • Engineer's Codex

36

1

November 2024

5 Non-LLM Software Trends To Be Excited About

Innovations outside the AI spotlight

Nov 12, 2024 • Engineer's Codex

143

4

13

October 2024

How Fireship became YouTube's favorite programmer

How Fireship wins YouTube

Oct 9, 2024

41

September 2024

The Boolean Trap

Use enums instead

Sep 5, 2024

87

20

4

July 2024

Good programmers worry about data structures and their relationships

Wisdom from Linus Torvalds, the creator of Git and Linux

Jul 8, 2024

161

12

10

April 2024

4 Software Design Principles I Learned the Hard Way

If there’s two sources of truth, one is probably wrong. And yes, please repeat yourself.

Apr 22, 2024

165

14

11

February 2024

Meta's new LLM-based test generator is a sneak peek to the future of development

Meta's TestGen-LLM is a sneak peek to the future of developer productivity: specialized, orchestrated, and rigorously filtered.

Feb 23, 2024

52

4

5

January 2024

How Apple built iCloud to store billions of databases

Apple uses Cassandra and FoundationDB for CloudKit, their cloud backend service. We take a look into how exactly each is used within their cloud and the…

Jan 14, 2024

112

10

7