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Eunix Tech - Software Engineering Company

How We Automated Invoice Processing for a US Construction Company

Real-world case study showing how we automated invoice processing using AI, n8n, and QuickBooks integration.

Overview

A US construction company was handling dozens of invoices manually every week. The process was slow and error-prone.

Problem

  • Manual PDF review
  • Incorrect data entries
  • Long approval cycle
  • Delayed payments
  • No tracking

Solution

We built an automated workflow:

  • PDF upload
  • AI data extraction
  • Auto-validation
  • Approval chain
  • QuickBooks entry
  • Status notifications
  • Audit log

Outcome

  • 20 hours saved monthly
  • 80 percent fewer errors
  • Faster approvals
  • Real-time tracking
  • Clean accounting data

Tools Used

n8n

OpenAI

QuickBooks API

Mailgun

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