Every Firm Formats It Differently

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

Domain

Pipeline Design

Difficulty

medium

Seniority

L5

Problem

We receive transaction reporting data from tens of thousands of regulated firms under MiFID II, and every firm formats their submission slightly differently. We need a pipeline that can ingest these files, normalize them to a canonical schema, validate them against regulatory rules, and produce an immutable record that auditors can query years later. Build it end-to-end and explain how you handle files whose structure changes without advance notice.

Summary

The regulator changed the format. Again. Handle it.

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