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I will develop custom shopify checkout ui extensions and upsell features
DevXTech
About this gig
Are you looking to optimize your Shopify checkout experience, increase Average Order Value (AOV), and convert more visitors using native Checkout Extensibility?
Welcome! I am a full-stack e-commerce developer specializing in building custom, high-performing Shopify Checkout UI Extensions using React, Remix, and GraphQL. Whether you need custom upsell offers, checkout validation rules, or personalized banners, I deliver clean, production-ready code aligned with Shopifys latest best practices.
Services I Offer:
- Custom Checkout UI Extensions (Order Summary, Main Checkout, Thank You & Order Status pages)
- In-Checkout One-Click Product Upsells & Cross-sells
- Free Gift Progress Bars & Cart Threshold Banners
- Custom Checkout Fields (Delivery Date Pickers, Gift Notes, Order Instructions)
- Custom Checkout Validation Rules & Gating Logic
- Metafield Integration for Dynamic Product/Order Content
- Seamless integration with Shopify Plus and Shopify Functions
Note: Custom Checkout UI extensions natively require a Shopify Plus plan or compatible Shopify development store settings. Please send me a message before placing an order to discuss your exact logic and workflow!
Respect third-party rights
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Get to know DevXTech
DevXTech
Shopify Wix Expert and Custom Checkout UI Developer
- FromPakistan
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English
Welcome to DevXTech. We are a specialized web development and e-commerce agency dedicated to crafting high-converting online storefronts and custom web solutions.
Our Core Expertise:
Custom Shopify & Wix store design and theme development
Custom Shopify Checkout UI extensions & app integrations
Speed optimization, responsive UI, and custom Liquid/React code
We turn complex technical requirements into seamless, modern shopping experiences that drive conversions.
Let's build something exceptional for your business. Contact us today to discuss your project!
My Portfolio
FAQ
Do I need Shopify Plus to use custom Checkout UI extensions?
Custom Checkout UI extensions on the main checkout page natively require a Shopify Plus subscription. However, extensions for the Thank You and Order Status pages work on all Shopify plans. If you are developing on a Shopify Partner dev store, we can build and test them before going live.
What technologies do you use to build Checkout UI extensions?
Extensions are developed using Shopify's official Checkout UI Components, React, Remix, GraphQL, and Shopify Functions. This ensures maximum loading speed, seamless mobile responsiveness, and future-proof compatibility with Shopify updates.
Can you build custom upsell and cross-sell offers inside the checkout?
Yes! We can create dynamic product upsells, free shipping progress bars, gift-with-purchase triggers, and post-purchase upsell banners directly within the order summary or checkout steps to boost your Average Order Value (AOV).
Can we collect custom buyer details like gift notes or delivery dates?
Absolutely. We can implement custom form fields (delivery date pickers, VAT numbers, gift messages, radio buttons) that save data directly to Shopify order metafields for seamless fulfillment.
What do you need from me to start the project?
To get started, I will need collaborator access to your Shopify store (or development store) with permissions for Apps, Checkout settings, and Metafields, along with a brief outline of the exact logic or visual layout you want to implement.
