
100 requests per minute, and 200 got through
Where the simplest rate limiter leaks, and what real APIs use instead.
System DesignInterview questions12 min
System design interview questions, and the follow-ups you get after your first answer. Each article goes from the first sketch to the part where it gets hard.

Where the simplest rate limiter leaks, and what real APIs use instead.
The classic warm-up question, and the follow-ups that make it hard.
Add one server to a cluster of ten and watch how many keys have to move.
I send one email when a new article is out, and nothing else.