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I will restore your shopify checkout customizations with checkout extensibility
Andrew Mathew
About this gig
Your Shopify checkout lost its power. Checkout. liquid is gone. Custom upsells, trust badges, order bumps vanished. You need them back.
I rebuild lost checkout features using Shopify Checkout UI Extensions & Post-Purchase API fast, affordable, safe.
I restore:
- Order upsells & cross-sells
- Thank-you page customization
- Trust badges & compliance messages
- Abandoned cart recovery flows
- Payment customizations
Why choose me:
- Specialist in Checkout Extensibility (not generic Shopify dev)
- 12 day turnaround (you need this NOW)
- Affordable vs. $5k+ agencies
- Unlimited revisions you control the outcome
- Full source files & documentation
- Responsive support throughout
My process: Review requirements Design extension Test sandbox Deploy live Full walkthrough.
Ready? Message me first. I'll explain exactly what's possible for your checkout. Let's get your revenue back.
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Get to know Andrew Mathew
Andrew Mathew
Shopify Web Pixels, Tracking Specialist, Meta CAPI, GA4, TikTok Conversion Fix
- FromFrance
- Member sinceJul 2026
- Avg. response time1 hour
Languages
English, French, Spanish
I fix the Shopify problems that quietly drain revenue: broken checkout tracking, missing purchase events, and customizations wiped out by Shopify's platform migrations.
Since checkout.liquid and Additional Scripts began shutting down, most stores don't notice until Meta and GA4 stop reporting conversions and ad performance tanks. The orders still come in — the data doesn't.
I migrate legacy scripts to the Web Pixels API, rebuild checkout customizations with Checkout UI Extensions and Functions, and verify every event fires end-to-end before I hand it back.
FAQ
What exactly is Checkout Extensibility, and how is it different from checkout.liquid?
Checkout.liquid was Shopify's old custom checkout code access (deprecated 2023). Checkout Extensibility = new Shopify system using UI Extensions + Post-Purchase API. It's more limited in scope but more stable. I rebuild lost features (upsells, thank you pages, trust badges) using this new system.
Will this break my existing checkout?
No. I build extensions in a sandbox first, test thoroughly, then deploy to your live checkout. Shopify's Checkout Extensibility is officially supported. Unlimited revisions until it's perfect. I also provide rollback instructions if needed (though rarely nee
How long does this actually take?
Basic package = 2 days. Standard = 3 days. Premium = 5 days. This includes sandbox testing & live deployment. I prioritize speed—merchants need their checkout features back ASAP. Expedited delivery available for rush orders.
Can you recreate my exact lost checkout feature?
Depends on what it was. Most common lost features (upsells, trust badges, order bumps, thank-yous) = 100% recreatable. Extremely complex dynamic logic = might need simplification. Message me first with your specific feature, and I'll confirm feasibility with zero-obligation estimate.
Do I get the source code?
Yes. Full source files + documentation included in all packages. You own everything. I also provide setup guide + video walkthrough for deployment. You can use it forever or hand it to another dev if needed.
Do I get the source code?
Yes. Full source files + documentation included in all packages. You own everything. I also provide setup guide + video walkthrough for deployment. You can use it forever or hand it to another dev if needed.
