Data Products and Domain Ownership
A platform can hold two hundred “data products” that nobody uses. The label is free; the consumer, the contract, and the support are not.
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Data Quality and Data Contracts
A green test suite means the data broke none of the rules you thought to write. Whether the numbers are correct is a different question with a different owner.
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Kafka Log, Replication, and Consumption
Order lives inside a partition, durability comes from in-sync replicas, and consumers hold their own place in the log. The rest is still your problem.
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Data Contract
Define a data contract with meaning, keys, units, ownership, quality rules, and a change process that consumers can actually depend on.