Illustrative impact based on published industry benchmarks — not results from a specific client.
Conversion lift per 0.1s mobile LCP improvement (retail)
Bounce-rate cut after fixing Core Web Vitals (AliExpress, published case)
Developer time lost weekly to tech debt & bad code, industry avg
The challenge
A mid-sized retailer's decade-old monolithic storefront carried slow Core Web Vitals scores and rising maintenance costs — both well-documented drivers of cart abandonment and shrinking developer velocity industry-wide.
Our approach
We migrate incrementally with a strangler-fig pattern: a headless Next.js frontend goes in front of the existing catalog first, then checkout and account services move behind it one at a time, avoiding a risky big-bang rewrite.
Expected impact
Google's own published Core Web Vitals case studies (NDTV, AliExpress) show meaningful bounce-rate and conversion gains once major performance bottlenecks are resolved — the pattern this blueprint targets.
Legacy storefronts rarely fail all at once — they slow down a few hundred milliseconds a year until checkout abandonment quietly becomes the norm. Deloitte and Google's joint 'Milliseconds Make Millions' research found a 0.1-second mobile speed improvement correlates with an 8.4% conversion lift in retail, and Google's own published Core Web Vitals case studies show real sites (AliExpress, NDTV) cutting bounce rate materially after fixing LCP and CLS.
Where the time actually goes
Before touching any code, we profile the real bottleneck — render-blocking third-party scripts, an unindexed database query on the product page, or a monolithic checkout flow that can't be cached at all. The chart below shows the kind of before/after split a typical re-platform targets, based on the published Google/AliExpress and NDTV case studies.
Where a re-platform typically moves the needle
Illustrative before/after split, modeled on published Google Core Web Vitals case studies
Illustrative — modeled on Google/AliExpress and NDTV's published Core Web Vitals case studies, not a specific client's measured results.
| Category | Legacy monolith | Re-platformed |
|---|---|---|
| Largest Contentful Paint (s) | 4.2 | 1.4 |
| Bounce rate (%) | 58 | 43 |
| Mobile conversion (%) | 1.8 | 2.6 |
Why incremental beats a full rewrite
A big-bang rewrite is the single riskiest way to modernize a revenue-generating storefront — it freezes feature work for months and bets the whole migration on one cutover night. The strangler-fig pattern instead puts a new headless Next.js frontend in front of the existing catalog and inventory systems from day one, so the storefront keeps taking orders throughout, and each service — checkout, search, account — cuts over independently once it's proven in production.
This pairs naturally with a broader accessibility pass too — a re-platform is the cheapest moment to fix WCAG gaps, since our accessibility remediation blueprint shows the same component-level work needed for performance (semantic markup, reduced DOM complexity) also closes most common accessibility failures.
Built with
Frequently asked
- Are these performance numbers guaranteed for our specific site?
- No — this is a solution blueprint. Every figure is a cited industry benchmark (Deloitte/Google, Google's own Core Web Vitals case studies) framed as typical impact, not a result NeuralYug delivered for a named client. Your actual gains depend on your current stack, traffic mix, and how much technical debt you're starting from.
- Do we have to rewrite everything at once?
- No — the strangler-fig approach is specifically designed to avoid that. We put a new frontend in front of the existing system and migrate one service at a time (catalog, then checkout, then accounts), so the storefront keeps taking orders throughout.
- How is this different from just optimizing images and calling it done?
- Image optimization helps but rarely fixes a legacy platform's core problem — architecture and technical debt. This blueprint targets the actual bottlenecks (render-blocking JS, unoptimized data fetching, monolithic coupling) that image compression alone can't touch.
➜ ~ ready to ship
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