Static generation at build time
The frontend was rebuilt with Next.js using Static Site Generation for product pages, so heavy HTML rendering happens at build time and is removed from the request path.
E-Commerce
High-Traffic E-Commerce Scalability & Performance Tuning — serverless-first on AWS, 15,000+ orders per minute and page loads 3.2 seconds faster
The core problem was catastrophic system failure during high-profile flash sales. Their existing infrastructure, built on a traditional LAMP stack of Linux, Apache, MySQL and PHP, was completely incapable of handling the sudden spikes in concurrent users.
- 750K
- 15K+
- 3.2s
The engagement
Client background
The client is a rapidly expanding global e-commerce platform specializing in limited-edition fashion and exclusive product drops. They operate in over 30 countries and have a highly engaged customer base that eagerly anticipates new product releases. Their business model relies heavily on flash sales, where high-demand items are released in limited quantities at specific times, creating massive, instantaneous surges in website traffic and transaction requests.
The challenge
During a major product drop, traffic would surge from a baseline of 5,000 concurrent users to over 500,000 within seconds. This resulted in database deadlocks, server crashes and an unresponsive frontend, leading to massive revenue losses, extreme customer frustration and severe brand damage.
The challenge was to re-architect the platform to handle extreme, sudden traffic spikes dynamically, ensure zero downtime during flash sales, and maintain a seamless, fast user experience.
The build
What we built
The architectural moves that replaced the system described above, in the order they shipped.
Global CDN delivery
Those static pages are served worldwide via AWS CloudFront, holding sub-100ms load times.
Serverless transactional tier
Cart management and checkout run as AWS Lambda functions behind API Gateway, scaling the compute layer from zero to tens of thousands of instances in response to demand.
DynamoDB product catalogue
The core product catalogue moved to DynamoDB, removing the relational database bottleneck.
Inventory cache
Amazon ElastiCache (Redis) provides an aggressive caching layer for inventory counts, preventing overselling during high-concurrency purchases.
- Next.js
- React
- Tailwind CSS
- AWS Lambda
- Amazon API Gateway
- Amazon DynamoDB
- Amazon ElastiCache
- Amazon CloudFront
- Amazon SQS
- Terraform
- PCI-DSS
Global limited-edition fashion and product-drop platform
Over 30 countries
Stack & architecture
Security built into every layer
Security was not a phase at the end of this build. It was engineered into the same release as the functionality it protects.
AI-driven WAF
AWS WAF applies custom rate-limiting rules and advanced bot detection algorithms against automated traffic.
Checkout CAPTCHA
A robust CAPTCHA system is triggered specifically during checkout flows.
PCI-DSS and 3D Secure 2.0
Payment processing is security-audited and PCI-DSS compliant, with 3D Secure 2.0 to reduce fraudulent chargebacks.
Scalper blocking
Anti-bot measures blocked over 2 million automated requests during a single sale, keeping access fair for legitimate customers.
Measured results
Outcomes we can defend
Every figure below was reported by the client after go-live.
- 750K
- 15K+
- 3.2s
- 400%
The re-architecture completely eliminated downtime during flash sales, handling a record-breaking product drop.
Processed with no server failure and no database deadlock.
Average page load times fell by 3.2 seconds, improving the user experience and SEO rankings.
Revenue generated during flash sale events, against the previous year.
Next step
Facing a similar constraint?
Tell us where the legacy system is holding you back. We will tell you honestly whether a rebuild, a strangler migration or a targeted fix is the right answer.
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