Voiceovers

Walkthrough of the engine — why stream processing exists, Kafka partitions to readers, source, router, the stateless and stateful worker stages, sinks, and backpressure.

System design walkthrough of Reddit — how posts, feeds, votes and comments fit together, and the tradeoffs behind each piece.

System design walkthrough of BetterStack — logs, metrics, alerts, ingestion pipelines, storage choices, and the tradeoffs behind observability systems.