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Shopify Plus · Headless Commerce · 90+ Mobile Performance Guaranteed

Shopify Builds That
Scale Revenue.

Enterprise-grade Liquid coding, sub-2s load times, and seamless migrations. We build high-converting Shopify stores engineered to decrease CAC and maximize LTV for ambitious D2C brands.

200+
Shopify Stores
99%
On-Time Delivery
2.7×
Avg. Conversion Lift
12+
Countries Served

Real Results.
Real Brands.

Every number below is verified. We build scalable technical foundations that directly impact the bottom line.

Shopify Plus Performance Overhaul · UK Fashion Label
The Challenge
A 50+ app store running at 4.2s load time with a PageSpeed score of 22. Conversion rate tanking under the technical debt.
What We Did
Full Liquid audit, app consolidation, image delivery via WebP, and LCP optimization across all critical pages.
Result
Load time: 4.2s → 0.8s · PageSpeed: 22 → 88 · Zero downtime on launch
Zest handled the technical debt so we could focus on growth.
WooCommerce to Shopify Migration · Global Retailer
The Challenge
Complex product catalog, significant SEO equity at risk, and a 3.8s load time that was hurting ad performance.
What We Did
Zero-data-loss migration, custom Liquid theming, and full SEO redirect mapping to preserve hard-earned rankings.
Result
Load time: 0.9s · SEO rankings maintained within 2 weeks of launch
I came with a messy website. The result I got was amazing.

Six Ways We Drive
Your Growth.

Every service is scoped with fixed pricing and built to 2026 performance standards — ensuring your store is ready to scale the moment it launches.

🏗️
Shopify Plus Architecture

Custom themes from Figma or PSD to production-ready code. Enterprise-level scaling, B2B functionality, and Shopify Scripts — built for brands that can't afford performance bottlenecks.

Headless Commerce

Sub-2s storefronts using Shopify Hydrogen and Oxygen frameworks. Maximum speed, maximum control — for agencies pitching the most technically demanding clients.

🔄
Store 2.0 Upgrades & Migrations

Seamless transitions from Magento, WooCommerce, or legacy Shopify themes — with zero data loss, full SEO equity preservation, and a guaranteed performance improvement.

🔌
Custom App & API Integration

We bridge Shopify with your client's ERP, CRM, or custom business logic. From inventory syncing to automated bidding and wallet architectures — the middleware others can't build.

🚀
Speed Recovery & Optimization

Already have a theme your client loves? We optimize it. We audit Liquid code, eliminate app bloat, implement WebP delivery, and compress scripts — without touching a single design element.

📊
Conversion Rate Optimization

We audit every user touchpoint: add-to-cart flow, checkout friction, mobile UX, and abandoned cart triggers — then implement changes that measurably improve revenue.

The Metrics That Actually
Impact Revenue.

Slow stores don't just frustrate customers — they actively destroy Google rankings and ad ROI. Our technical approach targets the metrics that move business outcomes.

Test Your Store's Speed
LCP — Largest Contentful Paint
Under 1.2s. Guaranteed.

We eliminate render-blocking resources and optimize above-the-fold delivery to consistently hit sub-1.2s LCP on every build we produce.

CLS — Cumulative Layout Shift
Visual Stability on Every Element.

We stabilize every visual element so your client's store passes Google's stability benchmarks — no jumping, no reflows, no failed audits.

INP — Interaction to Next Paint
Instant Response to Every Tap.

We optimize JavaScript execution to ensure the store responds instantly to every user action — especially critical on mobile commerce flows.

Core Web Vitals
2026 Google Thresholds. Pre-Launch.

All builds are tested against current Google performance thresholds before handoff — no post-launch surprises, no failed Lighthouse audits.

Shopify vs WooCommerce
Which is Right For You?

Choosing the right platform is critical for scaling. We build on both, but recommend them for entirely different business models.

✓ When to Choose Shopify Plus
You are a rapidly scaling D2C brand. You need bulletproof uptime during traffic spikes (Black Friday), seamless inventory syncing, and zero server maintenance. You want a massive app ecosystem built for conversion.
✓ When to Choose WooCommerce
You have a highly complex, non-standard product catalog. Your business model relies heavily on long-form content/SEO, or you require deep, proprietary custom logic that SaaS platforms cannot support.

Modern, Scalable,
Lightning Fast.

Liquid / PHP
Core Logic
Alpine.js
Lightweight Interactivity
Tailwind CSS
Utility Styling
Hydrogen & Oxygen
Headless Commerce

Shopify FAQs.
Answered Honestly.

Everything you'd want to know before trusting a technical partner with your storefront.

Most builds are delivered within 7–14 days. Migrations and complex custom builds may require 14–21 days depending on catalog size and integration requirements. All timelines are fixed upfront — no surprises.
Yes. We provide continuous technical SEO and Core Web Vitals monitoring to ensure your store maintains its performance as you add products, campaigns, and content.
Absolutely. We specialize in Shopify Plus enterprise features, custom Liquid, and Headless commerce using Hydrogen and Oxygen — delivering sub-2s performance at scale.
We specialize in "Speed Recovery" — optimizing the existing theme without changing its visual identity. We clean app code bloat, implement WebP delivery, minify scripts, and typically restore 90+ PageSpeed without your client noticing any design difference.
Yes. We perform a targeted performance audit, identify the exact sources of bloat, and resolve them surgically — your client's design stays completely intact.
Yes. All partnerships include post-launch monitoring, security updates, and performance scaling. We offer ongoing white-label maintenance retainers for agencies that need continuous support for their clients.

Ready to Scale Your
Shopify Store?

Join high-growth D2C brands that use Zest as their technical growth engine. Free technical scoping and speed audits included for all new partners.

Data-Driven ROI
Conversion Focused
High-Performance Architecture