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PolyGrabbers

A fully custom e-commerce platform for a manufacturer that needed more than Shopify could offer.

// calculateShipping(realTime, notGuessing)

The Need

A Made-in-the-USA manufacturing company needed more than a brochure site. They had two completely different customer types — retail buyers ordering single units and wholesale accounts ordering in bulk — each needing different pricing, different shipping rates, and different checkout flows. No off-the-shelf cart handled their model.

What I Built

A fully custom e-commerce system from the ground up. The ordering flow walks customers through quantity selection, address entry, and real-time UPS shipping rate calculation via OAuth 2.0. Wholesale customers log in and see tiered pricing that adjusts automatically based on their account level and order volume — plus discounted shipping rates. The system handles invoicing, packing slips, order status tracking, and delivery date estimates. I recently migrated the UPS integration from their legacy XML/SOAP API to the modern REST API, with token caching that dramatically reduces API calls.

The Result

A sales platform that handles the complexity of dual customer types without making either one jump through hoops. Retail customers get a simple buying experience. Wholesale accounts get the pricing and workflow they expect. And the business owner can manage it all without needing to understand the plumbing underneath.

PHP MySQL Stripe UPS OAuth 2.0 API Custom E-Commerce Tiered Pricing Invoicing

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