• Tailwind CSS
  • Shopify Hydrogen
  • Google PageSpeed
  • Hotjar
  • VWO
  • GTM

VIN Lookup & Sticky
Fitment Bar Integration

scroll

Client challenge

 Although mobile traffic made up 63% of the total sessions, mobile conversion rate remained stuck below 1%. Product pages loaded slowly, were cluttered, and lacked trust elements. Checkout had multiple friction points on smaller screens

Our solution

We ran a mobile-first UX sprint

Mobile-Optimized 
PDP Design

Rebuilt product detail page (PDP) for mobile: clean hierarchy, sticky CTA, lazy-loaded images

Above-the-Fold 
Trust Labels

Added trust labels (“Genuine OEM”, “Free Returns”, “24h Dispatch”) visible above the fold

Smart Mini-Cart with 
VIN Display

Created responsive mini-cart with part confirmation and VIN display

Streamlined Checkout Experience

Optimized checkout flow with Apple Pay, Google Pay, and 1-step address autofill

CTA A/B Testing for Conversions

Ran A/B tests for CTA language (“Buy now” vs “Fits your [Car Model]? Buy with confidence”)

Built for Mobile.
Optimized for Sales

Results & Measurable Impact

1.3

%

increase

Mobile CR increased from 1.1% to 2.4%

-22

%

reduction

Bounce rate dropped

2.1

S

Improved

Site speed improved from 4.2s to 2.1s on mobile

17

%

Improved

Mobile revenue within 30 days

Summary:

 The mobile experience was holding the business back. With more than 60% of traffic coming from mobile devices, every friction point was costing money. This case proves that mobile-first UX and performance improvements deliver fast, measurable ROI..

✅  If you fix mobile, you unlock growth – instantly

Ready to bring your vision to life?

Let’s chat about how we can design an experience that not only captivates but also converts and grows your business. 🚀

Get started

PORTFOLIO

Our Portfolio

Explore our portfolio to see the diverse range of projects we have successfully completed. They prove our commitment to excellence and impactful results.

GA4Shopify

Boosting Revenue Without Increasing Ad Budget

The marketing team reported high monthly traffic from paid sources but flat revenue growth. ROAS was declining. The company used standard product...
Read More

Shopify

Building Trust to Reduce Cart Abandonment

New users landed on product pages, added items to cart… but never completed checkout. Usability tests and session recordings revealed a clear...
Read More

GTMHotjarShopify

Optimizing Mobile Conversion in a High-Traffic Store

Although mobile traffic made up 63% of the total sessions, mobile conversion rate remained stuck below 1%. Product pages loaded slowly, were...
Read More

GA4, Shopify

Boosting Revenue Without Increasing Ad Budget

The marketing team reported high monthly traffic from paid sources but flat revenue growth. ROAS was declining. The company used standard product pages with generic recommendations, no segment-based personalization, and basic filters

Shopify

Building Trust to Reduce Cart Abandonment

New users landed on product pages, added items to cart… but never completed checkout. Usability tests and session recordings revealed a clear pattern: users didn’t trust the product or the site — no signs of compatibility, no warranty information, no signals of authenticity

GTM, Hotjar, Shopify

Optimizing Mobile Conversion in a High-Traffic Store

Although mobile traffic made up 63% of the total sessions, mobile conversion rate remained stuck below 1%. Product pages loaded slowly, were cluttered, and lacked trust elements. Checkout had multiple friction points on smaller screens

Magento 2, Vue.js

Eliminating Fitment-Based Returns (DACH Market)

A mid-sized B2C & B2B retailer operating in Austria and Germany had an 18% return rate — the majority due to users selecting the wrong parts. Their PDP lacked clarity, and filtering by vehicle was hidden or unavailable. They also served workshops and fleets with unique compatibility needs

GTM, React.js

VIN Lookup & Sticky Fitment Bar Integration

A leading German automotive eCommerce store faced a consistent problem: over 20% of returns were caused by customers ordering parts that didn’t fit their vehicles. Product pages lacked compatibility information, and filters didn’t account for car model specifics. This resulted in user frustration, poor reviews, and increased customer support costs.

UI/UX

TechGear CRO Case

TechGear is a leading online retailer of high-end consumer electronics, including laptops, gaming accessories, and home automation devices.
Shops

Angular, JavaScript

MoveBoard Project

MoveBoard is an innovative application designed to streamline package transportation processes, developed by Kozak Group. Focused on front-end development, the project involved repairing existing functionality and addressing bug fixes to enhance user experience.
Logistics

Blockchain

AllianceBlock Project

AllianceBlock is a pioneering blockchain-based crowdfunding platform developed by Kozak Group, designed to securely conduct initial coin offerings (ICOs) while generating and distributing tokens. This full-stack development project involves creating front-end modules and microservices from scratch, aimed at disrupting traditional fundraising and financing models, particularly for early-stage projects.
Finance

Magento

Vintage Sport

Vintage Sports Fashion is a cutting-edge e-commerce platform developed by Kozak Group, dedicated to offering a curated selection of unique vintage sports apparel and accessories. The project emphasizes both aesthetic appeal and high performance, featuring a full-stack development approach that ensures seamless functionality across the site.
Fashion

Magento

Fashionesta

Fashionesta is an advanced multistore e-commerce platform developed by Kozak Group, designed to meet the diverse needs of fashion retailers and consumers alike. Leveraging cutting-edge technologies like Varnish for high-speed caching and Sphinx for optimized search functionality, Fashionesta provides a seamless and engaging shopping experience.
Fashion

We specialize in IT staff augmentation services and solutions for ecommerce.
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Contact Info

Address:

Yevhena Konovaltsia St, 36d Kyiv, Ukraine 02000

Email:

info@kozak-group.com

Phone:

+380987568230

Address: 36d Konovaltsia St., Kyiv, Ukraine

Email: info@kozak-group.com

Phone:+380987568230

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