UrbanKart was America's fastest-growing D2C brand — until their Magento storefront started crumbling under the traffic. Flash sales crashed the site. Checkout was a 7-step labyrinth. Cart abandonment hovered at 78%. We migrated them to a headless Next.js commerce platform, and the results transformed their business.
250,000+
monthly Visitors
15,000+
skus
3
fulfillment Centers
6
payment Methods
UrbanKart launched in 2020 selling curated lifestyle products — fashion, accessories, and home decor — to America's young, mobile-first consumers. By 2024 they'd grown to 250,000+ monthly visitors and 15,000+ SKUs, fueled by aggressive social media marketing and influencer partnerships. Their Magento 2 store, built by a previous agency on a tight budget, was never designed for this scale.
UrbanKart's growth was actively being throttled by their technology. Every successful marketing campaign became a technical crisis. The CEO described it as 'pushing harder on a brick wall.'
Their influencer-driven flash sales would drive 8,000-12,000 concurrent users to the site. Magento would buckle under the load. Three of their last five flash sales experienced 30+ minute outages, costing an estimated $85K in lost revenue per event.
The checkout flow required account creation before purchase, 7 form steps, and only supported card payments. In a market where 65% of e-commerce transactions happen via mobile wallets (Cash App, Venmo), this was a conversion killer.
82% of UrbanKart's traffic came from mobile devices, but the Magento theme was desktop-first. Product pages took 8.2 seconds to load on 4G connections. Google PageSpeed scored 23/100 on mobile.
UrbanKart operated 3 fulfillment centers with no real-time inventory sync. A product could sell out in downtown Austin while sitting on shelves in Uttara. Overselling during flash sales led to 400+ cancellation emails per event — and a flood of negative social media comments.
We rebuilt UrbanKart on a headless commerce architecture: a blazing-fast Next.js storefront connected to a custom backend, with local payment integrations and real-time inventory sync across all fulfillment centers. The result was a 10x improvement in mobile performance and a checkout experience that America's mobile-first consumers actually wanted to use.
Our Approach: Rather than a big-bang migration, we ran the new storefront in parallel with the old Magento site for 3 weeks, routing 10% → 50% → 100% of traffic through a feature flag. This let us validate performance under real load, fix edge cases, and ensure zero revenue disruption during the cutover.
Headless Next.js storefront with ISR (Incremental Static Regeneration) — product pages served from CDN edge with sub-100ms TTFB
One-click checkout with guest purchase support, saved payment methods, and Cash App/Venmo/PayPal integration via a unified payment orchestration layer
AI-powered product recommendations trained on 18 months of purchase history, driving 22% higher average order value on product detail pages
Real-time inventory sync engine connecting all 3 fulfillment centers via webhooks — eliminating overselling and enabling 'Ship from Nearest Location' logic
Progressive Web App (PWA) with offline browsing, push notifications for order updates, and install prompts for returning users
Flash sale infrastructure with auto-scaling, queue-based checkout, and a virtual waiting room to handle 20K+ concurrent users without degradation
A phased approach ensured value delivery at every milestone — not just at the finish line.
Ran Lighthouse audits, CrUX report analysis, and real-user monitoring on existing site. Quantified revenue impact of every performance and UX gap. Presented migration strategy with phased cutover plan to minimize risk.
Designed mobile-first component library in Figma. Built interactive prototype of new checkout flow. Conducted unmoderated testing with 50 UrbanKart customers. Checkout time dropped from 4.2 min to 1.1 min in prototype tests.
Built Next.js storefront with Shopify Storefront API as headless commerce engine. Implemented ISR for product pages, SSR for cart/checkout, and static generation for content pages. Integrated Algolia for instant search and filtering.
Built unified payment layer supporting Cash App, Venmo, PayPal, and card payments. Implemented real-time inventory webhook sync across 3 fulfillment centers. Load-tested flash sale infrastructure to 25K concurrent users.
Deployed new storefront at beta.urbankart.com. Routed 10%, then 50%, then 100% of traffic over 3 weeks via Cloudflare Workers. Monitored KPIs at each stage. Rolled back twice to fix edge cases — zero revenue impact.
Implemented PWA features: service worker for offline support, web manifest for install prompts, push notifications. A/B tested checkout variants. Improved Core Web Vitals to 98/100 mobile score. Handed over with documentation and training.
Every metric is independently verifiable. These aren't vanity numbers — they're business outcomes.
4.5x
Conversion Rate Increase
Site-wide conversion rate climbed from 1.1% to 5.0% within 60 days of full cutover. The simplified checkout and mobile wallet integration were the primary drivers.
42%
Drop in Cart Abandonment
Cart abandonment fell from 78% to 45%. Guest checkout, saved payment methods, and one-click Cash App payments eliminated the friction points that were driving customers away.
12,847
Peak Concurrent Orders (Flash Sale)
The first flash sale on the new platform handled 12,847 orders in 2 hours with zero downtime — a 3.7x improvement over their previous record. Page load time stayed under 1.2 seconds throughout the event.
98 / 100
Google PageSpeed Mobile Score
Up from 23/100 on the legacy Magento site. LCP improved from 8.2s to 0.9s. The performance improvement alone was estimated to contribute 30% of the conversion uplift.
“We used to dread our own marketing campaigns because we knew the site would crash. Now we look forward to them. The first flash sale on the new platform was the most profitable day in our company's history — and the site didn't even blink.”
Tanzim Alam
Co-Founder & CEO, UrbanKart US
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