### How I used Duolingo to find my family in Poland

Duolingo and a fumbled sausage reunited these two long-lost families.

### How we built an automated unit test generation pipeline for iOS

### How a simple code change reduced CPU usage by 97%

### Triage, ship, debug—all from Slack

### Seeing the future: frontend prediction in Duolingo’s mobile app

### What I learned about incident management from search and rescue