B2B Wholesale Platform for Automotive Parts Distributor

Duration11 weeks

Budget$15,000 – $22,000 USD

IndustryB2B / Automotive aftermarket

RegionCentral Europe

The Challenge

A mid-sized automotive parts distributor was processing wholesale orders through email and spreadsheets. Each order took 20–30 minutes of manual data entry across their warehouse system, accounting software, and shipping platform. With 200+ B2B customers on different pricing tiers and a catalog of 4,000+ SKUs, quoting errors were costing them roughly $8K–12K per month in incorrect pricing and manual corrections. Their sales team was spending more time on data entry than selling.

The Solution

Custom WooCommerce B2B store with role-based pricing engine — 200+ customer tiers, each with individual discount matrices across product categories. Prices calculated on-the-fly, cached per session to keep page loads under 200ms.
Automated order pipeline via n8n: WooCommerce order → ERP invoice → warehouse pick list → shipping label generation. Entire flow runs in under 90 seconds with zero manual steps.
Real-time inventory sync between warehouse API and WooCommerce stock levels. 15-minute polling interval with webhook fallback for critical stock changes. Products automatically marked as “backordered” or hidden when stock hits zero.
Custom checkout flow with PO number capture, net-30/net-60 payment terms selection, and automated PDF invoice generation attached to order confirmation email.

The Result

85% fasterOrder processing time: from 25 min to under 4 min average

$0 quoting errorsDown from ~$10K/month in pricing mistakes

32 hours/weekFreed up for the sales team to focus on new accounts

Within the first month after launch, the client onboarded 40 existing customers onto the B2B portal. By month three, 78% of all orders were coming through the platform instead of email. The sales team redirected saved hours into outbound prospecting and grew their customer base by 15% in the following quarter.

Tech Stack

WooCommerce Custom B2B Plugin n8n REST API Action Scheduler MySQL PHP 8

What was unique

The pricing engine had to compute discounts across 4,000 SKUs × 200 customer tiers without slowing down product browsing. A naive database approach would have meant 800K price lookups on the shop page. We built a transient-backed cache layer that pre-computes prices per customer tier on login, then invalidates selectively when the warehouse sync updates specific product categories. Result: product listing pages load in under 180ms even for customers with the most complex pricing structures. The n8n pipeline processes 800+ order line items per day across three downstream systems with a zero-loss retry queue — if any system is temporarily down, the pipeline holds and retries without losing data.

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