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I will develop a custom shopify app with shopify functions and API
Jaber
Level 2
5.0
5.0
Gig Summary
About this gig
Need a custom Shopify app, Shopify Function, or checkout extension your store's default settings can't do? I build it using Shopify's current, approved tools, not outdated Scripts.
2 apps published & approved on the Shopify App Store, built to Shopify's real technical standards, not just "works on my test store."
What I build:
- Custom Shopify apps (Admin & Storefront API, GraphQL)
- Shopify Functions discounts, shipping, cart & checkout logic
- Checkout UI Extensions: upsells, trust badges, custom fields, banners
- Shopify Scripts Functions migration (Scripts stopped working in June 2026)
- Shopify Plus checkout customisation
- Webhooks & third-party API integrations (ERP, CRM, custom backend)
Why me:
- 7+ years of Shopify, WooCommerce, and WordPress development
- Stack: JavaScript, React, Next.js, Laravel, Express, PHP
- Fast delivery, clear communication, documented handover
- Post-delivery support included so your app keeps running smoothly
- App Server (if needed)
Not sure whether your idea needs a Function, an Extension, or a full app? Message me your use case, and I'll tell you honestly- no upselling.
Get to know Jaber
Jaber
A passionate Artist of Code
Level 2
- FromBangladesh
- Member sinceJul 2018
- Avg. response time1 hour
- Last delivery1 month
Languages
Bengali, English, German, Spanish
Hi, I'm Jaber. I got into code back in 2014, mostly out of curiosity about how websites worked — and it turned into a career. 10+ years and around 5,000 projects later, that same curiosity is still what drives me, just backed by a lot more experience now.
These days I focus on custom e-commerce solutions —the stuff a theme alone can't do. I like clear communication, no overcomplicating things, and being upfront if something isn't a good fit.
Got something you're building? Tell me about it — happy to give you an
honest read.
Other Software Development Services I Offer
FAQ
What's the difference between a Function and a Checkout Extension?
Function changes backend logic (like discount or shipping rules) invisibly. A Checkout UI Extension adds something a customer actually sees on the checkout/Thank You page. I'll tell you which one your idea needs.
My Shopify Scripts stopped working — can you fix this?
Yes — Shopify Scripts were deprecated on June 30, 2026. I migrate existing Script logic over to Shopify Functions so your store keeps working exactly as intended.
Do I need Shopify Plus for this?
Checkout Extensibility and Functions are available on all current Shopify plans for most use cases, though some advanced checkout customizations are Plus-only. Send me your plan and I'll confirm before you order.
Can you integrate my Shopify store with an third party system?
Yes — I build custom API/webhook integrations connecting Shopify to ERPs, CRMs, or custom backends.
What do you need from me to start?
Store access (collaborator or staff account), a clear description of the desired behavior, and any existing Script code if this is a migration. Some apps need a server to host it. If you need it we will provide after discussing.
Reviews
11 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G 
googleadsproff
Turkey
Perfect work as always!!
$400-$600
Price
4 days
Duration
Helpful?G googleadsproff
Turkey
Exceptional work as always!!!
$400-$600
Price
2 days
Duration
Helpful?G googleadsproff
Turkey
Exceptional as always!!
$100-$200
Price
1 day
Duration
Helpful?G googleadsproff
Turkey
10000/10 work!!! Quick, exceptional communication and just on point!!
$100-$200
Price
5 days
Duration
Helpful?J juul72
Netherlands
Great work again!
$200-$400
Price
4 days
Duration
Helpful?
Reviews
11 reviews for this Gig
| (11) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G googleadsproff
Turkey
Perfect work as always!!
$400-$600
Price
4 days
Duration
Helpful?G googleadsproff
Turkey
Exceptional work as always!!!
$400-$600
Price
2 days
Duration
Helpful?G googleadsproff
Turkey
Exceptional as always!!
$100-$200
Price
1 day
Duration
Helpful?G googleadsproff
Turkey
10000/10 work!!! Quick, exceptional communication and just on point!!
$100-$200
Price
5 days
Duration
Helpful?J juul72
Netherlands
Great work again!
$200-$400
Price
4 days
Duration
Helpful?
