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Intermediate ~20 hours

Structured Output Extraction System

Build a service that extracts structured data (tables, entities, classifications) from messy text with high accuracy.

PythonAnthropic SDK or OpenAIPydanticInstructor or BAML

About this project

Structured extraction is one of the highest-business-value AI tasks: parse contracts, extract entities from emails, classify customer support tickets. This project teaches schema-driven extraction with function calling, the validation patterns that catch hallucinations, and the eval methodology. Pick a real domain — invoices, resumes, support tickets — and ship a service with measurable accuracy.

Why build this in 2026?

Document/data extraction is one of the highest-ROI AI use-cases in enterprises. Specialty hiring opportunity.

What you'll ship

  • GitHub repo
Eval set with 50+ examples
Accuracy report by field

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Skills you'll practice

pythonlarge language modelsrest apis