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Vojislav, founder of CartWhy

Founder of CartWhy

Hi, I’m Vojislav.

I’m a Shopify developer with 10 years on the platform and 500+ stores behind me. I find why a store isn’t converting, and I can fix it in the theme.

I’ll tell you when a fix isn’t worth the money.

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Why CartWhy

The same problems, store after store

I help Shopify store owners get more out of the store they already have, through Shopify optimization, custom theme coding and design improvements. That work means going through a store the way a shopper does, page by page, on a phone.

The same problems keep showing up: a product page that is slow to load, options that make people stop and think, shipping costs that appear too late, and products that Google and ChatGPT can’t read properly.

CartWhy turns that into one clear answer: why your store isn’t converting, what to change first, and how to tell when it’s fixed. Your developer can work from it, or I can make the changes for you.

How I work

Four steps, no surprises

  1. 1

    You send your store URL

    A short form. No store access needed for the audit.

  2. 2

    I reply within 1 business day

    With the next steps and a start date.

  3. 3

    Report in 7 business days

    Every finding ranked, with what to change and how to tell it’s done. I answer your questions for 30 days.

  4. 4

    Fixes, if you want them

    Your developer works from the report, or I make the changes in your theme.

What you can expect

Straight answers

  • I’ll tell you what to fix first, and what to leave alone.
  • No guessed percentages. Only what I saw on your store.
  • Changes go live only after you approve them.

What I work with

Your theme, your data

I work directly in your theme’s code: Liquid, JavaScript, HTML and CSS. Product pages, the cart and landing pages are where most of the conversion and design work happens.

For speed and search I use Google’s own tools, like PageSpeed Insights, and for fixes your Search Console and analytics when you share them. I also check whether AI search crawlers can reach and read your products.

Feedback

What clients say about my work

  • He doesn’t tell you what you want to hear; he tells you what needs to be said.

    Store owner, Switzerland

  • We interviewed several candidates for this job and chose him because he was the only one who understood what needed to be done.

    Store owner, United States

  • He’s honestly the best, the only person we let handle our issues and custom work.

    Store owner, United States

  • He doesn’t hesitate to push back and challenge the brief based on his technical knowledge.

    Shopify agency, France

  • He showed strong technical expertise and worked in a structured, professional manner, focusing on real performance issues rather than superficial score improvements.

    Store owner, Turkey

  • He was extremely thorough and professional in his work. He did exactly what he said he would.

    Store owner, United States

  • He’s fast, extremely knowledgeable, and genuinely understands how to squeeze the best performance out of a website without compromising design.

    Store owner, United States

  • The final result exceeded my expectations, and the entire process was smooth and enjoyable.

    Store owner, United States

Write to me about your store

Send me your store URL and what worries you, and I’ll tell you what I’d look at first.

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