I will build a custom shopify app, API integration or store customization

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tariik_velic
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tariik_velic
Tarik V.
build a custom shopify app, API integration or store customization
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build a custom shopify app, API integration or store customization

About this gig

Hi, I'm Tarik - a senior full-stack developer with 5+ years building Shopify apps used by 150k+ merchants (core engineer on top-grossing apps including Releasit, CartHook and Sky Pilot).


What I can do for you:

  • Custom Shopify apps (public or custom): embedded admin UI in React + Polaris with App Bridge
  • - Shopify API & third-party integrations: GraphQL Admin API, webhooks, billing, OAuth
  • - Store & theme customization: Liquid, sections, checkout, speed/performance
  • - Bug fixes, "unauthorized access"/OAuth issues, and high-volume order processing

Why work with me: I've shipped real production Shopify apps at scale, write clean, reliable, well-documented code, and communicate clearly throughout. You get a senior developer who owns the work end to end.


Please message me before ordering with your requirements - I'll confirm the scope, timeline and the right package for you. Let's build something great.

  • Website type

    • E-Commerce store

  • Website features

    • Marketing
    • Payment
    • Shipping
    • Inventory
    • Analytics
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 Tarik V.

Tarik V.

Full Stack and Shopify App Developer, React, Nextjs, Node

  • FromBosnia and Herzegovina
  • Member sinceJun 2026
  • Avg. response time1 hour

  • Languages

    Bosnian, English
Hi, I'm Tarik, a Senior Full-Stack Developer. I build production web apps, SaaS and Shopify apps. Core engineer on top Shopify apps (Releasit COD, Sky Pilot, CartHook) serving 150k+ merchants. Stack: React, Next.js, TypeScript, Node.js, GraphQL, PostgreSQL, Stripe. I also built and launched a full SaaS (Trainera.fit) with web and mobile apps. Clean code, clear communication, and someone who owns the work from idea to deployment. Available for fixed projects, hourly work and long-term / retainer collaboration. Message me and I'll send a custom offer that fits.

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