A multi-tenant SaaS platform ingests from many sources, has a legacy dual-write inside its order ser

A medium Pipeline Design interview practice problem on DataDriven. Write and execute real pipeline design code with instant grading.

Domain

Pipeline Design

Difficulty

medium

Problem

A multi-tenant SaaS platform ingests from many sources, has a legacy dual-write inside its order service, serves three downstream consumer teams, and has weathered a flash sale that revealed it has no backpressure handling. Compose the resilient ingestion. Replace the dual write with the transactional outbox and a Debezium-driven publisher. Add a durable buffer between producer and consumer with a named depth and overflow strategy. Add resource isolation by tier with a per-tenant lag monitor. Each sink dedupes on a stable key. The three downstream consumers continue to receive events through the new outbox-fed Kafka topics.

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