Riajul Islam Home
Shopify & CRO Open for builds

Shopify stores,
built to convert.

Two halves of one job: build a store that loads in under a second, then test it into converting. Headless Hydrogen, custom Liquid themes, speed work and the CRO program that turns your existing traffic into orders. No bloated apps, no theme spaghetti.

Build a store that loads in under a second — then test it into converting.

−58%
Faster load times
+24%
Mobile conversion
12
Shopify builds shipped
— Brands I've worked with

Stores that needed to be fast — and stay that way.

VellumHarborlineNorthwindBrightlaneKettle & Co.Field NotesLumenAtlas Supply
— What I do on Shopify

Five ways I help your store.

Start a project ↗
Shopify service 01 / 05

Shopify Store Development

I build high-performing Shopify stores from Figma, custom design or brand requirements — with clean structure, responsive layout and a conversion-focused user experience.

8 capabilities
  • Figma to Shopify development
  • Custom Shopify theme development
  • Responsive storefront design
  • Product and collection setup
  • Payment gateway setup
  • Shipping and tax configuration
  • Shopify app integration
  • Store launch support
Start a project
Shopify service 02 / 05

Shopify Custom Features

I develop custom Shopify features, sections and storefront functionality that make stores more flexible, interactive and business-ready.

7 capabilities
  • Custom Shopify sections
  • Advanced storefront interactions
  • Custom cart features
  • Product filter setup
  • Bundle and offer features
  • Third-party integration
  • Custom Shopify functionality
Start a project
Shopify service 03 / 05

Shopify Performance Optimization

I improve Shopify store speed, Core Web Vitals and overall performance to create a faster shopping experience for your customers.

6 capabilities
  • Shopify speed optimization
  • Core Web Vitals improvement
  • Image and media optimization
  • Script and app cleanup
  • Theme code optimization
  • Performance audit and fixes
Start a project
Shopify service 04 / 05

Shopify Store Customization

I customize existing Shopify stores with better design, improved sections, smoother layouts and storefront features that match the brand properly.

7 capabilities
  • Shopify theme customization
  • UI / UX improvements
  • Custom section development
  • Homepage and product page updates
  • Store layout modifications
  • App-based feature setup
  • Theme update support
Start a project
Shopify service 05 / 05

Shopify Development Support

I provide ongoing Shopify development support for store owners, designers, agencies and ecommerce teams who need reliable technical help.

6 capabilities
  • Ongoing Shopify support
  • Bug fixing and maintenance
  • Store updates and improvements
  • UI and storefront adjustments
  • New feature development
  • Long-term technical support
Start a project
— My approach

How a build actually goes.

Audit & strategy

01/04

A Lighthouse audit and a funnel review, then a plan tied to revenue — not vanity metrics.

Design & build

02/04

Theme or headless, built mobile-first with clean, documented, reviewable code.

Speed & QA

03/04

Real-device testing, a performance budget, and a checkout that survives the edge cases.

Launch & optimize

04/04

A zero-downtime cutover with analytics in place — then we test our way to a better conversion rate.

— By the numbers

Built, then measured.

0
Shopify stores built & optimized
0
A/B tests shipped
−0%
Page load time
+0%
Best single-test lift
$0M+
Extra revenue generated

Figures across recent Shopify engagements. Your numbers depend on your starting point — the audit tells us where the headroom is.

— Conversion rate optimization

More revenue from the
traffic you already have.

A fast store is step one — CRO is how it actually sells. I run data-driven tests on your product pages, cart and checkout to turn more of your existing visitors into buyers. Same traffic, more orders, no extra ad spend.

Conversion audit & funnel analysisA/B & multivariate testingProduct page (PDP) optimizationCart & checkout optimizationMobile conversion optimizationTrust, urgency & social proofHeatmaps & session recordingsLanding page optimization
— Where the money leaks

For every 100 visitors,
92 leave without buying.

Sessions 12,480
−43%slow load · weak hero
Product views 7,140
−56%unclear PDP · no urgency
Add to cart 3,120
−50%forced account · surprise fees
Checkout 1,560
−36%long form · few pay options
Purchase 998

Product pages

Imagery, copy, reviews and a sticky add-to-cart.

Impact

Cart & checkout

Fewer steps, express pay, recovered carts.

Impact

Mobile UX

Speed and tap-friendly flows where most traffic is.

Impact

Store speed

Core Web Vitals that pay back in orders.

Impact

Trust & proof

Reviews, badges and guarantees at the point of doubt.

Impact
— The CRO process

A loop, not a one-off.

01

Audit & data review

GA4, Shopify analytics, heatmaps and session recordings pinpoint exactly where visitors hesitate and drop.

02

Hypotheses & prioritisation

Findings become testable hypotheses, ranked by impact, confidence and effort (ICE) — highest leverage first.

03

Design & build the variant

Built directly in your theme — pixel-clean, fast, and flicker-free.

04

A/B test to significance

Traffic is split and the test runs to 95%+ confidence. No guessing, no peeking.

05

Ship the winner

Winners roll out, the learning is documented, and the lift is banked.

Then back to 01 — at a higher baseline
— Do the math

What a better rate is worth.

Get your number ↗
Extra revenue / year
$0
from a +1.0 pt conversion change
Revenue now$0/mo
After$0/mo
Monthly uplift+$0
Extra orders / yr0

Illustrative — drag the sliders to model your own store. Real projections come from your analytics.

— Tests that moved the needle

Real experiments, ranked by lift.

#TestMetricLift
01 Sticky add-to-cartPDP · mobile Add-to-cart rate +34%
02 One-page checkoutCheckout Checkout completion +19%
03 Trust badges at checkoutCheckout Completion rate +12%
04 Free-shipping threshold barCart Average order value +9%
— What clients say

Shipped, fast, and still standing.

"

Riajul shipped our Shopify rebuild ahead of schedule and our store has never been faster. Clean code, clear updates, zero drama.

SW
Sarah Whitfield Founder, Vellum
"

He took our slow, app-stuffed theme and got it under a second on mobile. Conversion went up the first week.

ML
Marcus Lee Founder, Harborline
— Shopify & CRO FAQ

The questions
I usually get.

Headless or a regular theme — which do I need?
+

Most stores don't need headless. If a fast, well-built theme gets you there, I'll say so. Headless earns its keep once you've outgrown Liquid or want a fully custom front end — I'll be honest about which side you're on.

Can you work with my existing theme?
+

Yes. A lot of the work is improving what's already there — speed, bug fixes, new sections, conversion tests — without a full rebuild.

How long does a Shopify build take?
+

A focused theme build is usually 3–6 weeks; a headless storefront, 6–10. An AI-accelerated workflow does a lot of the theme scaffolding, so more of that time goes into the conversion details. You get a real timeline after a short scoping call, not a guess.

Do you handle migrations?
+

WooCommerce, Magento, BigCommerce or a legacy Shopify theme — I migrate products, content and URLs with redirects so you don't lose rankings.

How much can CRO realistically gain me?
+

It depends on your starting point — a rough, app-heavy store has more headroom than a polished one. Single tests often land 5–30% on the metric they target, and because CRO compounds, those wins stack. I'll give you an honest read after the audit, not a fantasy number.

Do I need a lot of traffic for A/B testing?
+

Some, yes — statistical significance needs volume. Under ~10k monthly visitors we lean on best-practice fixes, heatmaps and session recordings first, and save formal A/B tests for the pages that get enough traffic.

How long does a CRO test take?
+

Usually 2–4 weeks per test to reach 95%+ confidence, depending on traffic and effect size. Rushing it is how you ship false winners — so I let tests run their course.

Will testing slow my store down?
+

No. Variants are built into the theme and performance-budgeted — no third-party flicker, no layout shift. Speed and conversion pull the same direction here.

What happens after launch?
+

I don't vanish at handoff. You get docs, a clean repo, and support options — including a steady cadence of conversion tests if you want to keep compounding the gains.

Ready to make Shopify
actually sell?