🌍 Overview

The client wanted their sales system (GHL CRM) and accounting system (Fortnox) to work seamlessly together. Previously, sales teams and accounting teams had to manually re-enter data, leading to:

• Duplicate customer records
• Inconsistent invoices
• Lost discounts or incorrect taxes
• Hours of wasted manual effort

I built a custom integration that automated the entire process, ensuring that customers, invoices, orders, and products synced smoothly between the two platforms.

✨ Key Business Benefits

• Saved Time: Sales and accounting teams no longer re-entered data.
• Improved Accuracy: No duplicates, no missing discounts, no mismatched taxes.
• Flexible Workflows: Clients could choose whether orders went into Fortnox as draft orders first (for review) or directly as invoices.
• Scalable for Growth: The integration currently powers 1,000+ GHL subaccounts, each with their own Fortnox connection.
• Peace of Mind: Built-in retry mechanisms ensured nothing was ever lost if one system went down.

⚙️ Technical Details

My Role

Backend Developer — designed and implemented the full integration logic, error handling, and deployment.

Tech Stack

• Language: Python
• Database: SQL (for storing tokens, feature flags, failed requests)