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Mike Fisher
Product Engineer
Mike Fisher's posts
We turned off Pub/Sub and nobody noticed
Our entire event-driven platform ran through a single message broker, which made it a single point of failure. So we added a second one. This is the story of building an event load balancer, the queuing theory behind it, and the final chaos test where we turned off Pub/Sub in production and nobody noticed.
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August 11, 2026
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.
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.
November 14, 2025
So good, you’ll break things on purpose
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