• Vue.js
  • ElasticSearch
  • Magento 2
  • B2B modules
  • Fitment microservice (Node.js)
  • User session profiling

Eliminating Fitment-Based Returns (DACH Market)

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Client challenge

 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

Our solution

 We began with a UX audit and behavioral analytics (Hotjar, GA4) to pinpoint where users dropped off. Based on insights, we introduced

Advanced Fitment 
Filters

Enhanced product listing filters based on car make/model/engine

Dynamic Fitment 
Display Modules

Added dynamic PDP modules that show fitment by vehicle type (table and visual layout)

Multi-Vehicle Compatibility Checker

Developed “Check compatibility with another vehicle” option

User Garage 
Profiles

Integrated garage profiles for registered users to store multiple vehicles

B2B Bulk 
Fitment Tools

For B2B users, added structured fitment categories for quick bulk ordering

Built for B2B &
B2C Efficiency

Results & Measurable Impact

-30

%

return

rate over 6 weeks

Better experience for workshop buyers and 
fleet managers

15

%

increase

in customer service inquiries about compatibility

Streamlined reordering and lower cart abandonment

Summary:

 Our work helped the client turn compatibility into a competitive advantage – not just a checkbox feature. By combining smart filtering, clear messages, and structured fitment content, we reduced returns while streamlining the shopping process for both B2C and B2B audiences.

✅ Clarity drives conversion – structure wins over confusion

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.

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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.

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TechGear CRO Case

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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

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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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