Developed a comprehensive, end-to-end automation engine using n8n to replace slow, error-prone manual profit margin calculations with real-time, data-driven visibility. The system synchronizes order data across ShipStation, BigCommerce, and major marketplaces like Amazon and Walmart, integrating complex logic for item-level costs, multi-currency conversions (via Frankfurter API), and customer-specific discounts within Airtable. This automation reduced processing time to seconds per order and eliminated manual entry errors. Key strategic features include a low-margin detection system with an integrated team review workflow, automated management reporting, and a robust architecture handling deduplication and missing data fallbacks. The solution provides immediate, reliable profitability insights for pricing and operational decision-making.