Grassias Stock Matrix is the custom stock management software we built for a client selling across Amazon, Shopify, and eBay. The platform centralizes inventory tracking, sales analytics, profit calculations, delivery and platform fee monitoring, and product management into one unified dashboard. Replacing a complex Excel-based workflow, the system now provides real-time insights, visual sales graphs, and streamlined operations tailored to multi-platform e-commerce businesses.
One of our clients named Davvy operates across multiple e-commerce platforms, including Amazon, Shopify, and eBay. Each of these marketplaces has different conditions, rules, and fee structures. The client needed stock management software that could track stock, sales, profit, delivery fees, platform fees, sales profit graphs, product lists, and more in one place.
Previously, the client managed everything using Excel, which became tedious and inefficient. Seeking a better, all-in-one solution, he turned to an AI software builder platform. Using React.js and a PostgreSQL database, he attempted to build the software himself. After hours of effort, debugging, and frustration, he realized the system wasn’t working properly and lacked the “human touch” needed to bring it to life.
Our team took on the challenge of this complex task. The client provided us with the full source code, Excel sheets, product data, and profit calculations. We carefully studied the codebase over the course of seven days to identify the core issues and determine how to enhance the system with additional features.
After 30 days of development, we delivered a working version of the Grassias stock matrix management system. The client reviewed it, requested a few corrections and additional features, which we quickly implemented.
In the end, we built a powerful, all-in-one stock and sales management solution, with every marketplace rule, fee, and margin visible in one place instead of scattered across spreadsheet tabs. The client was extremely satisfied with the result. We also handled Shopify theme development for Grassias to increase sales.
For another build where an external data source drives the site, see our case study on the WordPress Multisite for Het Groene Brein.
NeoDigify did an incredible job transforming my messy, half-built stock management system into a fully functional solution. I was struggling to manage sales and inventory across Amazon, Shopify, and eBay using Excel and an unfinished AI tool. Their team took over, cleaned up the code, added key features like profit tracking and sales graphs, and delivered exactly what I needed. Fast, responsive, and professional—highly recommended!
UK
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