E-Commerce / Retail
Bespoke Checkout & Payment Gateway Engineering
A unified WooCommerce checkout and multi-gateway payment engine, engineered without third-party plugin dependencies — reduced checkout latency by 40%.
Project Overview
Industry
E-Commerce / Retail
Solution
Bespoke Checkout & Payment Gateway Engineering
Services
Technologies
The Challenge
Where This Started.
Before
- Checkout assembled from 3+ stacked third-party plugins
- Every gateway added its own scripts and its own failure points
- Diagnosing a payment issue meant checking three separate plugins
After
- One unified checkout and multi-gateway payment engine
- PCI-compliant transaction handling built on WooCommerce Core
- A single, consolidated transaction log instead of three
Business Impact
Why It Mattered
Checkout is the one page on a WooCommerce store where every millisecond and every error directly costs revenue. The store had outgrown a plugin-stacked checkout, and every new payment method added made the page slower and harder to maintain.
Engineering Approach
How We Approached It
Rather than adding a fourth plugin, the checkout and payment logic was rebuilt as one unified engine directly on top of WooCommerce's own Core REST API and transaction logic — removing the third-party gateway plugins entirely rather than working around them.
Architecture
How It's Wired Together.
A single checkout controller now owns the full order-to-payment flow, dispatching to each gateway through one consistent internal interface instead of letting each gateway plugin run its own independent logic and enqueue its own scripts.
Implementation
What We Built
Rebuilt gateway integrations directly against provider APIs, consolidated client-side JS into a single checkout bundle, and replaced plugin-specific transaction logging with one unified, auditable transaction record.
Technical Highlights
What Made This Work.
-
One checkout engine handling multiple payment gateways
-
PCI-compliant transaction handling built on WooCommerce Core
-
Single consolidated transaction log instead of one per gateway plugin
Results
The Outcome.
A faster, more reliable checkout with one system to maintain and audit instead of three, and a PCI-compliant transaction flow that scales as new payment methods are added.
Lessons Learned
What This Taught Us
Plugin-per-gateway is the default path in WooCommerce, but it compounds — every additional gateway multiplies the number of independent systems that can fail. Owning the checkout logic directly, even though it takes more upfront engineering, pays off in speed and maintainability.
Facing a Similar Challenge?
Let's talk about what your store or system actually needs — no template pitch, just an engineering conversation.