Case studies/CS_01/2026

Engineering a high-scale headless commerce architecture handling $18M+ annual GMV.

+47%
Mobile Conversion
0.38s
LCP Performance
$18M+
Annual GMV Processed
99.99%
Peak-Season Uptime
Client
Apex Commerce
Industry
E-Commerce / Headless
[ Brief ]

The short version

Legacy storefront infrastructure was causing checkout friction and high bounce rates during peak sales. We architected a headless Next.js edge-rendered experience with instant cart state and sub-second page loads.

Services
Headless EngineeringPerformance OptimizationSubscription Architecture
Stack
Next.js 15SupabaseStripe EdgeVercel EdgeSanity CMS
01

The Challenge

Apex Commerce faced growing technical debt with their legacy monolithic theme. Flash campaign traffic spikes caused severe database locking and checkout drops. Conversion rates on mobile devices had regressed significantly over two consecutive quarters.

02

Architectural Approach

We decoupled the frontend presentation layer from backend merchandising services. We engineered a static-first, edge-revalidated architecture using Next.js 15, storing core state in Supabase and leveraging Stripe Edge APIs for instantaneous 1-click customer checkouts.

03

Engineering & Migration

Migration executed across three planned phases: Product detail pages first, followed by dynamic cart services and user account portals. All releases were governed by feature flags to ensure zero downtime throughout the transition.

04

Business Impact

The new platform processed record Black Friday traffic effortlessly. Mobile page load speeds dropped from 3.8s to under 0.4s, overall conversion increased by 47%, and recurring subscription revenue grew 24% in the first 90 days.

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