Event Logging

on YouTube ↗11m

" summary

Truecaller rebuilds event logging around two concrete choices: a single, immutable schema repo using Apache Avro to generate cross-language libraries so events don’t desync, and modeling inbound telemetry as reactive streams with Akka Streams so backpressure and buffering propagate failures upstream. The stack serves ~200 million users, blocks about 400 million spam calls per month, and fewer than 90 engineers, and these changes have prevented production data loss multiple times while eliminating version-mismatch bugs.

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" chapters (4)

1. 0:00Start
2. 3:14Block Spam and Unwanted Calls
3. 4:04Event Logging
4. 6:38Schemas

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