José David Baena – Distributed Systems Engineer https://josedavidbaena.com Production notes and source-backed analysis on distributed systems, messaging infrastructure, open-source internals, and model engineering. en-us josedab@gmail.com (José David Baena) josedab@gmail.com (José David Baena) Tue, 08 Sep 2026 00:00:00 GMT https://josedavidbaena.com/blog/kafka-reliability/consumer-progress Commit the Completed Kafka Prefix, Not the Last Completed Record https://josedavidbaena.com/blog/kafka-reliability/consumer-progress Compute safe Kafka consumer progress across concurrent handlers, sparse offsets, rebalance, shutdown, async commits, and poison records. Tue, 08 Sep 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkareliabilityconsumersconcurrency