DataPipelines

Series Posts

Conceptual Every Record Counts: Data Engineering for Backend Engineers

Part 2: "Think in Pipelines" — The Data Engineer's Mental Model

Rohan's first daily sales job doubles a day's revenue on a retry and loses late till uploads. Rebuilding it teaches the data engineer's mental model: pipelines as functions, idempotency, partition-scoped overwrites, raw/silver/gold layers, and the five promises behind "every record counts".

Conceptual Every Record Counts: Data Engineering for Backend Engineers

Part 25: "Design Review II" — The Batch Reporting Platform, End to End

Season 2 ends where it began: with Farah and a quarter to sign. Rohan defends Larkspur's batch platform end to end in interview order, from sources and ingestion through contracts, reconciliation, governance and cost: sized from the lab's own tables, with every failure mode named against the part that caught it, what changes at ten times the volume, and what still isn't finished. Then the board pack is recomputed from the lakehouse and the restatement approved. Plus a self-host vs managed matrix, a printable checklist and a clinical-trials drill.