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I will build, customize, fix your shopify store, checkout, integrations, bfcm ready SEO
Esther G
Level 1
About this gig
Need a Shopify developer to build, customize, fix, or integrate your store?
I help businesses build reliable Shopify systems from theme customization and custom functionality to checkout, payments, APIs, and third-party integrations.
My Shopify services include:
- Shopify store development & customization
- Shopify theme and Liquid customization
- Custom sections and product pages
- Product, variant & collection setup
- Shopify API integration
- Third-party API integrations
- Custom checkout & payment workflows
- Shopify + Whop integration
- Payment gateway integration
- Webhooks & automation
- Order, product & inventory workflows
- Custom backend integrations
- Shopify bugs and functionality fixes
- Mobile responsiveness fixes
- Cart and checkout troubleshooting
- Existing store improvements
I can work with your existing Shopify store or implement a new feature based on your requirements. For technical integrations, I can connect Shopify with external platforms, APIs, databases, payment systems, and custom backend services.
Whether you need a Shopify customization, API integration, checkout fix, Whop connection, or a more advanced technical solution, send me your requirements before ordering.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Esther G
Esther G
Shopify Integration, Backend, APIs and Integrations , Payment and App Setup
Level 1
- FromUnited Kingdom
- Member sinceApr 2026
- Avg. response time5 hours
- Last delivery1 month
Languages
English, Spanish, German
I’m a full-stack developer specializing in Shopify, backend development, APIs, and integrations. I build and fix Shopify stores, custom checkout flows, payment systems, third-party integrations, and Shopify APIs. I also develop reliable backends with Supabase, PostgreSQL, Firebase, Node.js, authentication, RLS, webhooks, and REST APIs. I work with AI/vibe-coded apps built with Lovable, Bolt, and Replit, connecting the frontend to a secure, production-ready backend. If your store or web app is broken, incomplete, or needs a custom integration, I can help.
Other Website Maintenance Services I Offer
FAQ
Can you customize my existing Shopify theme?
Yes. I can modify Shopify themes, Liquid code, sections, layouts, product pages, collections, and other store functionality while working with your existing setup.
Can you integrate Shopify with another platform?
Yes. I can connect Shopify with third-party platforms using APIs, webhooks, backend services, and other appropriate integration methods.
Can you connect Shopify to Whop?
Yes. I can set up Shopify–Whop workflows including product mapping, checkout connections, payment flows, order handling, and related backend integration.
Can you fix a Shopify bug or broken functionality?
Yes. Send me the issue, screenshots or error messages, and the expected behavior. I can investigate the cause and implement the appropriate fix.
Do you work with Shopify APIs?
Yes. I can work with Shopify APIs for products, orders, customers, inventory, checkout-related workflows, external integrations, and automation.
Can you integrate payment systems?
Yes, depending on the required workflow and Shopify's supported integration options. I can also work with external payment APIs and backend payment flows.
Can you create custom Shopify functionality?
Yes. I can develop custom functionality using Shopify Liquid, APIs, webhooks, JavaScript, and external backend services where required.
Can you fix Shopify checkout or cart problems?
Yes. I can troubleshoot checkout, cart, product, variant, payment-flow, and related integration issues.
Can you connect Shopify to my custom backend?
Yes. I can connect Shopify with custom backend systems through APIs, webhooks, authentication, and data synchronization workflows.
What do you need before I place an order?
Send your Shopify store URL, a clear description of what you need, screenshots or error messages if applicable, and any relevant API/integration documentation. For larger projects, please message me first so I can review the scope.
