PDF Anomaly Detection Tool

I need a Python expert to develop a program that reads Purchase Order (PO) and Invoice PDFs to identify anomalies. The invoice PDFs are unstructured with a non-fixed format.

Requirements:
- Compare line items from PO and invoice
- Identify anomalies:
- Pricing differences
- Quantity mismatches
- Missing line items
- Present findings in a summary report

Ideal Skills and Experience:
- Proficiency in Python
- Experience with PDF parsing and data extraction
- Familiarity with anomaly detection techniques
- Ability to generate summary reports

Please provide relevant work samples.