When it comes to eCommerce website development, ensuring a smooth and reliable checkout experience is critical for both customer satisfaction and conversion rates. At TuhamWorld CC, we specialize in building high-performing, well-optimized online stores for clients in Nigeria and beyond.
In this case study, we’ll walk you through how we solved a critical issue involving live shipping rate integration that was causing checkout errors, and how we turned a frustrating obstacle into a technical victory.

eCommerce Website Development Project Background
Our client needed a custom-built eCommerce website development that not only supports local and international orders, but also offers:
- Smart coupon discounts based on item quantity
- Seamless integration with email marketing tools
- Reliable SMTP email configuration for email deliverability
- Multiple payment gateway options
- Real-time shipping rates are displayed on the checkout page
We used WordPress and WooCommerce to build the store, leveraging custom plugins and APIs to meet the business goals.
The Challenge: Checkout Page Failing for Some Users
Shortly after the website went live, we received a report:
“Tuham, the website we were working on is failing on the checkout page for some users.”
The checkout page issues can directly affect revenue, and we did an extensive internal testing before launch, so this was unexpected.
We then immediately began troubleshooting, suspecting the issue could stem from the live shipping rate API or payment gateway integration.
Diagnosis & Root Cause
Using error logs and different troubleshooting tactics, we discovered the culprit:
The third-party shipping software used to pull real-time shipping rates was making too many requests on the server at a time, and this was interrupting the checkout flow entirely.
The Solution
To maintain performance and ensure uninterrupted checkout flow:
- We replaced the shipping API plugin with a more stable and faster alternative
- Reconfigured the API to support international destinations
- Re-tested all payment gateways and coupon logic
- Optimized the checkout page speed and responsiveness
The Outcome
- No more checkout failures
- Improved performance at checkout
- Seamless local and international shipping rate calculation
- Better user experience across devices and regions
Conclusion
This case study highlights the importance of going beyond surface-level eCommerce website development. At TuhamWorld CC, we specialize in:
- Reliable eCommerce website development
- Troubleshooting API and plugin issues
- Custom WordPress and WooCommerce builds
- Checkout optimization for better conversions
Need a Reliable eCommerce Website?
Need a Reliable eCommerce Website?
If you’re planning to build or upgrade your online store, we can help you create a fast, secure, and scalable eCommerce website solution tailored to your business needs.