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I will do shopify checkout custom extensibility fix shopify checkout customization code
Samuel
About this gig
A broken or plain Shopify checkout quietly kills your store's conversion rate every single day. Whether you need an urgent payment or shipping bug fix, or want to upgrade to Shopify Checkout Extensibility with custom fields, trust badges, and post-purchase upsells, I deliver clean, native liquid and app-free solutions.
What I Handle for Your Checkout:
- Fix checkout errors, shipping calculation bugs, & payment gateway failures
- Custom Checkout Extensibility setup (fields, banners, delivery rules)
- High-converting post-purchase upsells & order bump integration
- Custom styling, brand colors, layout tweaks, & trust badge placement
- Shopify Functions setup for custom discount & shipping logic
- Full 100% app-free native code (zero monthly fees, maximum speed)
Why Merchants Choose This Service:
- Native Shopify 2.0 & Extensibility expert
- Clean, bug-free liquid code that preserves site speed
- Fast resolution to prevent lost sales & revenue drop
- 100% satisfaction guarantee with dedicated post-delivery support
Stop letting checkout issues drain your revenue. Send a message now with your store link and exact requirements to get your checkout running flawlessly!
Respect third-party rights
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Get to know Samuel
Samuel
Prestashop Developer and Ecommerce expert
- FromUnited Kingdom
- Member sinceMay 2026
- Avg. response time1 hour
Languages
English, French, Italian
Hi! I'm Samuel a Prestashop Developer and upgrader also an expert in Ecommerce with years of expertise and experience.
I provide elite technical solutions in two key areas:
PrestaShop Expert: Specializing in complex upgrades (PS 1.7/8 to PS 9), data migrations, and custom modules.
Modern Full-Stack: Building scalable web apps using Next.js, React, Prisma, and Neon (PostgreSQL).
I am a software architect. Whether you need to modernize your PrestaShop store or build a SaaS from scratch, I guarantee clean code, security, and peak performance.
FAQ
Will your checkout customizations slow down my Shopify store?
Not at all. Everything is coded natively using clean Liquid, CSS, and Shopify Checkout Extensibility standards. No heavy external scripts or slow apps are added.
Can you customize the checkout on non-Shopify Plus stores?
Yes! While full Checkout Extensibility branding is native to Plus, standard Shopify plans support native post-purchase apps, custom app extensions, editor branding, and custom checkout apps. Message me your plan to verify!
What do you need to start fixing or customizing my checkout?
I will need staff access (or collaborator code) to your Shopify store, a description or screenshot of the error, and any design/branding details you want added.
What if my checkout is completely failing to process orders?
Select the Basic or Standard package and contact me immediately. Urgent checkout bugs are prioritized to ensure your store stops losing sales right away.
Are there any recurring monthly app fees for these custom features?
No. I focus on native, custom-coded integrations so you get permanent functionality without paying ongoing subscription fees.
