I will develop custom private shopify apps and fix app bugs

F
farzanaalamrume
F
farzanaalamrume
Fahad Hasan
develop custom private shopify apps and fix app bugs
Full Screen
develop custom private shopify apps and fix app bugs

About this gig

Fiverr Gig Description Shopify Custom App Development & Bug Fixes

Need a custom Shopify app built from scratch, or is an existing app throwing errors, breaking checkout, or misbehaving after an update? I build and fix private/custom Shopify apps using Shopify CLI, Admin API, Storefront API, and Web Pixels production apps, not templates, not quick hacks.

WHAT I CAN BUILD/FIX:

  • Custom private apps (Admin API, Metafields, Webhooks)
  • App bugs broken installs, auth/OAuth errors, API rate-limit issues, crashing scripts
  • Checkout/Web Pixel extensions & app embeds (theme app extensions)
  • COD order flows with OTP phone verification (anti-fraud)
  • Courier & payment gateway integrations (Pathao, SteadFast, bKash, SSLCommerz, EPS)
  • Order automation, fraud checkers, marketing/SMS modules
  • Migrating deprecated APIs (Checkout.liquid Extensions)

RECENT WORK:

Built a full COD order-management app for a children's toy Shopify store, replacing native checkout with a custom Buy Now popup delivered as an app embed. It handles OTP verification via SMS to block fake COD orders before they fire Meta/Google/TikTok purchase pixels, plus fraud checking, multi-courier dispatch etc.

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 Fahad Hasan

Fahad Hasan

7 plus years building Shopify apps, stores and mobile apps

5.0(27)
  • FromBangladesh
  • Member sinceMar 2022
  • Avg. response time1 hour
  • Last delivery2 years

  • Languages

    Bengali, English, Hindi, Urdu
I'm Fahad Hasan Rume, a full-time software engineer with 7+ years of experience, working across four things: Custom private Shopify apps built to your spec, plus bug fixes on apps you already run. Shopify and dropshipping stores, designed and launched end to end. Cross-platform Flutter apps, built pixel-accurate from Figma, XD or PSD. Manual white-hat link building on high-DA sites. I reply fast and won't take a job I can't do well. Message me first and let's scope it properly.

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