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    For engineers who build with AI

    AI writes the config. You decide if it holds.

    Play Kafka Play Redis

    First chapter free with a free account. Nothing to install.

    Start with these 12.

    Kafka: Siege

    1. Wave 04 Producer acks, min.insync.replicas, Unclean leader election, Idempotent producerMoney Never Sleeps Free
    2. Wave 05 Offset commits and delivery semantics, Idempotent consumersCrash Course Free
    3. Wave 07 Keys, partitioners and hot partitionsCelebrity Effect Free
    4. Wave 16 Stream processing with Kafka Streams, Transactions and exactly-onceFraud Ring
    5. Wave 19 Schema Registry and compatibilityBreaking Change
    6. Wave 29 An acquired topic with bad defaults and no ACLsThe Merger

    Redis: Voxel Defense

    1. Lesson 02 Atomic commands and lost updatesCounter Rush Free
    2. Lesson 04 Cache-aside, misses, and invalidationCache Gate Free
    3. Lesson 05 Cache stampedes and coordinated refreshCold Start Free
    4. Lesson 11 Memory limits and eviction policyMemory Tide
    5. Lesson 19 Asynchronous replication, offsets, and backlogMirrors
    6. Lesson 34 Reclaim, duplicate delivery, and business idempotencyLost Parcel

    The first chapter takes a few minutes.

    Play Kafka Play Redis

    Also for: Backend engineers new to Kafka or Redis, SREs and platform engineers, System design interviews