Mike Fisher's posts

Customers over control: how we measure On-call reliability

Instead of thinking about reliability as an exercise in figuring out what we can control, and ignoring anything beyond that, we think about what we'll be really proud to offer to customers.

Mike Fisher

May 28, 2026

Bloom filters: the niche trick behind a 16× faster API

This post is a deep dive into how we improved the P95 latency of an API endpoint from 5s to 0.3s using a niche little computer science trick called a bloom filter.

Mike Fisher

November 14, 2025

So good, you’ll break things on purpose

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