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lecture · 13:33 · 4 checkpoints · browser voiceIntermediate

Uber: the right car in under 3 seconds

How Uber matches a rider to a driver in under 3 s while ~500K driver pings a second land at peak: live locations as soft state in an H3 hexagon index in Redis, trips created exactly once in Spanner, ETA-led scoring with one PENDING offer at a time, per-cell smoothed surge, and a failover that replicates trips and rebuilds locations.

Read the side quest: Uber→

01 · Friday night, downtown

SQ-09 · Uber

One tap. One driver. Three seconds.

Friday, 11 PM, downtown

Picture a Friday night, 11 o'clock, downtown.

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0:00 / 13:33Friday night, downtown

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