I will develop custom shopify apps and API integration

M
marvjames950
M
marvjames950
Marv J

Level 2

develop custom shopify apps and API integration
Full Screen
develop custom shopify apps and API integration
Full Screen
Full Screen
View Presentation
develop custom shopify apps and API integrationdevelop custom shopify apps and API integrationdevelop custom shopify apps and API integrationdevelop custom shopify apps and API integration

About this gig

Is your Shopify store held back by limitations in the default theme or app ecosystem? I build custom Shopify apps and connect third party APIs so your store works exactly the way your business needs it to.

What I offer:

  • Custom private & public Shopify apps (Node.js, Remix, Shopify CLI)
  • REST & GraphQL API integration (payment gateways, shipping, ERP, CRM, inventory, marketing tools)
  • Shopify Admin API, Storefront API, and Webhook automation
  • App UI built with Shopify Polaris for a native admin feel
  • Bug fixes and upgrades to existing Shopify apps
  • Clean, documented, scalable code

Why work with me: ️

  • Hands-on experience with the Shopify App Bridge, OAuth, and App Store guidelines ️
  • Clear communication and realistic timelines ️
  • Code delivered with testing on a development store before going live ️
  • Post-delivery support to make sure everything runs smoothly


Whether you need a small automation, a full custom app, or an integration between Shopify and an external platform, I will scope it clearly before we start so there are no surprises.


Message me with your requirements for a free scope review before ordering I will tell tell you honestly which package fits your project.

  • Website type

    • E-Commerce store

  • Website features

    • Marketing
    • Forum
    • Social media
    • Shipping
    • Inventory
    • Analytics
    • Chat
    • API integration
    • AI integration
    • Contact form

  • Plugins

    • Nudgify
    • Free Shipping Bar
    • Product Reviews
    • Product Filter & Search
    • PageSpeed Monitor
    • PageFly
    • Smart SEO
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 Marv J

Marv J

Shopify Store Setup, GMC Product Feed, TikTok Fixes, Virtual Staging

5.0(11)

Level 2

  • FromNigeria
  • Member sinceMar 2026
  • Avg. response time1 hour
  • Last delivery3 weeks

  • Languages

    English, German, Spanish, French, Hindi
Hi, I'm Marv, a versatile eCommerce and digital specialist with 5+ years of experience in Shopify and WooCommerce. I fix product feed errors, build and redesign online stores, and handle landing page design. I also do winning product research, dropshipping supplier sourcing, and TikTok shadowban fixes with ad appeal restoration. My services include Shopify store cloning, real estate virtual staging, and virtual assistant support for order fulfillment and store management. Let's work together to grow your online business and boost your sales!

My Portfolio

Related tags