7 shotsB—01 · Alo Yoga
Storefronts
that sell
harder.
scroll
Shopify Development✦Performance Engineering✦Upsell & Cross-Sell Systems✦Core Web Vitals✦Liquid · JS · APIs✦Headless Commerce✦Conversion UX✦
Shopify Development✦Performance Engineering✦Upsell & Cross-Sell Systems✦Core Web Vitals✦Liquid · JS · APIs✦Headless Commerce✦Conversion UX✦
01 — Profile
I’m Mamdouh — most people call me Dan. I engineer Shopify storefronts that are fast, conversion-obsessed and built to scale. I think in funnels, write clean Liquid & JavaScript, and treat every millisecond like it owes the business money.
9+
Years front-end
8
Years on Shopify
13+
Global brands
∞
Perf obsession
01.5 — Live metrics
This page, measured live.
Real Core Web Vitals captured in your browser, right now — because a performance engineer’s site should prove it.
—score
Performance
Lighthouse-style
—LCP
Largest Paint
Target < 2.5s
—CLS
Layout Shift
Target < 0.1
—Page loaded
—First paint
—Transferred
—Requests
02 — Selected builds
Stores I’ve engineered.
7 shots
9 shotsB—02 · Volcom Spain
Collection + PDP, Klarna & Get-the-Fit
View gallery →
5 shotsB—03 · Oshoplin
CK-inspired multi-brand storefront
View gallery →Also engineered & contributed for
Cole Haan US · Footwear
Vestiaire Collective Global · Resale
The Giving Movement UAE · Activewear
Pier 1 US · Home
Skechers Global · Footwear
ECCO Global · Footwear
ANTA Global · Sportswear
Umbro Global · Sportswear
The Bradery France · Flash sales
KOI UK · Footwear
dressbarn US · Apparel
Cizaro Egypt · Fashion
03 — Featured case
A high-performance upsell & cross-sell system.
// scope
- Upsell system development
- Cart-page upsell features
- Custom popup systems
- UX-focused enhancements
// built
- Upsell sections wired into cart logic
- Dynamic offers from cart contents
- High-performance popups, no load hit
- Performance-safe DOM manipulation
// tech
- Shopify Liquid customization
- JavaScript-driven upsell logic
- Optimized, lazy asset loading
- Zero render-blocking behavior
Higher AOV
Contextual upsells on cart
More engagement
Frictionless cart interaction
Zero compromise
Premium feel, full speed
04 — Capabilities
Three modules. Zero distractions.
04 / 01
Shopify Development
Custom themes · Liquid
Custom theme development with advanced Liquid, JavaScript and storefront logic — features built precisely to brand & business needs.
- Custom theme architecture
- Advanced Liquid & JS
- Shopify APIs
04 / 02
Performance Optimization
Core Web Vitals · Audits
Core Web Vitals optimization, speed audits and fixes, JS & asset optimization — conversion-focused improvements that make stores feel instant.
- Speed audits & fixes
- Asset & JS optimization
- CWV tuning
04 / 03
Experience Engineering
Upsell · Cart · UX
Upsell & cross-sell systems, cart & checkout optimization, custom popups and engagement logic — seamless UX for high-traffic stores.
- Upsell & cross-sell
- Cart & checkout
- Engagement logic
05 — Stack
The technical manifest.
// core
Shopify EXPERT
Liquid EXPERT
JavaScript ES6+ ADVANCED
HTML5 / CSS3 EXPERT
Shopify APIs ADVANCED
// specialization
Performance Eng. FOCUS
Ecommerce UX Logic FOCUS
Upsell / Conversion FOCUS
High-traffic stores FOCUS
Theme Optimization FOCUS
// also
React PROFICIENT
Headless / Hydrogen PROFICIENT
Core Web Vitals ADVANCED
Cart & Checkout ADVANCED
A/B & CRO PRACTICAL
06 — Trusted by
Brands I’ve engineered for.
The BraderyVestiaire CollectivePier 1The Giving MovementdressbarnKOIMason’sSkechers
The BraderyVestiaire CollectivePier 1The Giving MovementdressbarnKOIMason’sSkechers
Cole HaanVolcomANTAeccoumbroaloOshoplinCizaro
Cole HaanVolcomANTAeccoumbroaloOshoplinCizaro
07 — About
Mamdouh Aly — aka Dan.
9+ years in front-end. 8 years deep in Shopify. I’ve built ecommerce experiences for brands across Egypt, the US, UK and Spain — from Alo Yoga’s cross-sell engine to Volcom’s full collection & product pages, and Oshoplin’s multi-brand store.
I’ve engineered storefronts alongside global names — Cole Haan, Vestiaire Collective, Pier 1, The Bradery, The Giving Movement, KOI, dressbarn, Mason’s — plus Skechers, ECCO, Umbro and ANTA. I think in conversion funnels, build in clean code, and ship stores that turn browsers into buyers.
lat 30.0444 · lng 31.2357 · CAIRO, EG
dan@portfolio:~$ ./start-a-build.sh
Let’s build something
that ships.
Start a build
mamdohali720@gmail.com · +20 102 212 7566 · CAIRO, EG