Design an AI pipeline that extracts structured data from unstructured documents (invoices, contracts, forms).

Document extraction (IDP) is a huge enterprise use case with a hard correctness bar: a wrong extracted number is worse than none. The signal is the parse, extract, validate, human-review pipeline and confidence-based routing. Here is the design.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.