BEHIND THE SCENES: EVOLVING NETFLIX'S ADS EVENT PIPELINE FOR LIVE

Summary from the TLDR Data newsletter

Netflix rebuilt its live ads event pipeline on Apache Flink, moving metadata enrichment out of the ad-serving critical path and into stateful streaming joins. The design handles region-aware routing, late events, hourly Spark recovery, best-effort deduplication, and dual-run validation that reached over 99.99% agreement before the legacy system was retired.