USA·
UK·
AU·
UAE·
India Dev CentreA high-performance, scalable ecommerce platform built to handle large product catalogues, high traffic volumes, and seamless checkout experiences — designed to maximize conversions and customer retention.
Increased conversion rate by 35%, reduced cart abandonment by 28%, and enabled the platform to handle 10× more concurrent users.
Project Highlights
Scalable Architecture
Built for growth — Web App designed to scale
Secure & Compliant
Enterprise-grade security and data protection standards
Measurable ROI
Legacy slow store → High-performance ecommerce platform
United States Delivery
Delivered for a United States-based Retail client
Tech Stack
Last updated:
Industry
Retail
Sector
Ecommerce
Region
United States
Project Type
Web App
The client is a United States retail brand selling a broad product range directly to consumers online. With a large and growing catalogue, seasonal promotions and marketing campaigns that drive sharp spikes in traffic, its ecommerce store is the primary revenue channel and the main point of contact with customers across the country.
In the competitive US direct-to-consumer market, shoppers expect fast pages, effortless mobile checkout and accurate stock information, and they abandon slow or confusing stores quickly. Search visibility also depends heavily on page experience and Core Web Vitals. For this brand, the ecommerce platform was not a back-office tool but the storefront itself, so its performance had a direct and measurable effect on sales and loyalty.
This project was delivered under a Non-Disclosure Agreement. The client operates in the Retail sector (Ecommerce) and is based in United States.
The legacy store struggled under peak traffic, slowing down or failing just when promotions were driving the most visitors. Mobile shoppers, by now the majority, faced a clumsy experience with slow product pages and a checkout that was hard to complete on a small screen. Every lost session during a campaign translated directly into lost revenue.
Behind the scenes, payments and inventory were not properly integrated. Stock levels were not updated in real time, risking overselling, and the platform lacked flexible payment options and any structured way to recover abandoned carts. The business needed a custom platform that could scale on demand, keep inventory accurate and present a polished, accessible shopping experience in line with US expectations such as ADA-conscious design.
Legacy slow store
High-performance ecommerce platform
PapaSiddhi engineered a fully custom ecommerce platform with a React storefront, a Node.js back end and PostgreSQL for products, orders, customers and inventory. The architecture was designed for high concurrency, with optimised queries and caching so the high-performance product catalogue and advanced filtering stay responsive even with a very large catalogue during sales events.
Checkout was rebuilt as a streamlined, mobile-first flow with multi-gateway payment integration led by Stripe, while a shipping integration via the Shiprocket API supports order fulfilment and tracking. Real-time inventory and order management keeps stock accurate across channels, and automated cart abandonment recovery workflows re-engage shoppers who leave before paying. A customer account portal provides order history and tracking. Throughout development the team focused on Core Web Vitals, image optimisation and code splitting to protect search rankings, and built the interface with accessibility in mind to support ADA and WCAG-aligned usability.
Increased conversion rate by 35%, reduced cart abandonment by 28%, and enabled the platform to handle 10× more concurrent users. Achieved 90+ PageSpeed score across all devices.
Transformation Summary
Legacy slow store → High-performance ecommerce platform
This project was delivered under a Non-Disclosure Agreement (NDA). Specific client details, business data, proprietary workflows, and project credentials remain confidential. Screenshots and live URLs are available upon mutual NDA execution.
Request an NDA to see full detailsFor most retailers we would genuinely recommend Shopify — it is the right answer when your requirements fit its model. Custom made sense here because the client needed deep inventory synchronisation and checkout behaviour that platform constraints made expensive or impossible, and at their traffic volume the per-transaction platform fees exceeded the build cost over a reasonable horizon.
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