How We Built Uber Engineering’s Highest Query per Second Service Using Go

eng.uber.com

In early 2015 we built a microservice that does one thing (and does it really well), geofence lookups. One year later, this service is Uber’s highest queries per second (QPS) service out of the hundreds we run in production. Here’s the story of why we built this service, and how the relatively recent Go programming language helped us build and scale it so fast.

Background

At Uber, a geofence refers to a human-defined geographic area (or polygon in geometry terms) on the Earth’s surface. We use geofences extensively at Uber for geo-based configurations.

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