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I will develop shopify functions fix migrate shopify script checkout shopify custom app
Jerry D
About this gig
Need a Shopify Functions developer to fix, migrate or build custom Shopify logic? I can help with Shopify Functions, Shopify Scripts migration, checkout extensibility and custom Shopify apps
I work on:
- Shopify Functions for discounts, cart validation, delivery/shipping and payment customization
- Shopify Scripts migration to Shopify Functions
- Checkout extensibility, Checkout UI extensions and checkout customization
- Custom Shopify apps, app extensions, webhooks and Shopify API integration
- Shopify GraphQL/Admin API, Storefront API, metafields and metaobjects
- Custom checkout logic, cart transforms, bundles, upsells and pricing rules
- Shopify Plus development, Shopify Flow and automation
- Bug fixing, broken checkout, app conflicts and custom functionality
Whether you need a legacy checkout.liquid/Script migration, a custom Function, checkout extension, API integration or a new Shopify custom app, I can build or fix it with clean, upgrade-safe implementation
Message me before ordering with your requirements so I can recommend the right Shopify solution
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Get to know Jerry D
Jerry D
Vibe coding developer claude code specialist Shopify developer
- FromUnited Kingdom
- Member sinceMar 2026
- Avg. response time4 hours
Languages
English, French, Spanish, German
I am a Lovable AI developer specializing in SaaS MVPs, AI startups, dashboards, automation tools, and production-ready web apps using Lovable, Replit, Base44, Supabase, and Vercel.
I help founders build scalable AI web apps, PWAs, SaaS platforms, and Shopify solutions. Services include AI app development, Supabase backend, authentication, API integration, dashboards, deployment, Shopify Functions, Shopify custom apps, Checkout Extensibility, Shopify Scripts migration, and Shopify API integration.
I deliver fast, reliable, production-ready solutions
FAQ
Can you migrate Shopify Scripts to Shopify Functions?
Yes. I can review your existing Script logic, rebuild the required functionality using Shopify Functions, test the new logic and help replace legacy checkout customizations with supported Shopify extensions.
Can you build custom Shopify Functions?
Yes. I can develop custom Functions for discounts, cart validation, delivery customization, payment customization, cart transforms, fulfillment rules and other supported Shopify business logic
Can you customize Shopify Checkout?
Yes. I can work with Checkout Extensibility, Checkout UI Extensions, Functions, post-purchase extensions, Thank You page and Order Status page functionality where supported by your Shopify plan.
Can you fix broken Shopify Scripts or checkout code?
Yes. I can troubleshoot Shopify Scripts, checkout issues, Function errors, app conflicts, broken custom logic and other Shopify development problems and recommend a supported solution.
Can you build a custom Shopify app?
Yes. I can build custom Shopify apps and app extensions using Shopify APIs, GraphQL, webhooks, Shopify Functions, checkout extensions and other required Shopify technologies
Do you work with Shopify GraphQL API?
Yes. I can work with Shopify GraphQL/Admin API, Storefront API, webhooks, OAuth and API-based integrations depending on your project requirements.
Can you create custom discount or pricing logic?
Yes. I can build supported Shopify Function logic for discounts, cart validation, pricing rules and related checkout business requirements
Can you build Shopify checkout extensions for Shopify Plus?
Yes. I can develop supported Checkout UI Extensions and checkout functionality for eligible Shopify Plus stores, including custom workflows and checkout UI components.
Can you build Shopify bundles using Functions?
Yes. I can develop supported bundle and cart logic using Shopify Functions, cart transforms, metafields/metaobjects and custom storefront functionality where applicable
