The Challenge
The retailer's monolithic storefront buckled under load. During promotions, pages slowed to a crawl and the site occasionally went down entirely — directly costing sales at the most valuable moments of the year. Their team knew Black Friday would break the existing system.
Our Approach
We ran a performance audit, then moved to a headless, performance-first architecture with aggressive caching and a global CDN:
- Migrated to a headless storefront with statically rendered, CDN-cached pages
- Offloaded product and inventory reads to a caching layer
- Introduced autoscaling for checkout and cart services
- Optimized images and critical rendering path for Core Web Vitals
- Load-tested at 10x expected peak before launch
The Results
The rebuilt platform sailed through Black Friday with zero downtime, absorbing a 10x traffic spike without breaking a sweat. Median page load time dropped 63%, and the faster experience lifted conversion rate by 27% — turning peak season from a source of anxiety into the retailer's best-performing period ever.
"For the first time, our biggest sales day was completely stress-free. The site was fast, stable, and our revenue proved it."
Technologies Used
A headless commerce frontend, a global CDN, Redis caching, autoscaling containerized services, and a continuous load-testing pipeline.