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$
USD
I will build a custom shopify app or API integration for your store, inventory sync
Samuel .H
5.0
5.0
About this gig
Looking for a skilled Shopify developer who can build powerful, scalable, and performance driven apps? You're in the right place. My name is Walker, and I specialize in creating high quality Shopify public apps, custom apps, private apps (legacy), and Shopify POS apps tailored to your business needs.
I deliver secure code, seamless integrations, and fully optimized solutions using Shopify Admin API, Storefront API, OAuth, Webhooks, Shopify Functions, Polaris UI, App Bridge, and modern app development best practices.
Services I Offer:
- Shopify Bug Fix
- Shopify Public App Development
- Shopify Custom App Development
- Shopify Private App Maintenance & Migration
- Shopify POS App & Hardware Integrations
- Bug Fixing & App Optimization
- API Development & Third-Party Integrations
- Custom Dashboards & Automation Workflows
- Embedded App UI with Polaris
- Webhooks, Scripts & Shopify Functions
- Performance, Security & Scalability Enhancements
If you want a fast, secure, and future-proof Shopify solution created by a dedicated expert let's work together.
Ready to scale your Shopify business? Click Continue and get started today!
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Get to know Samuel .H
Samuel .H
Everything Shopify
- FromUnited States
- Member sinceMar 2026
- Avg. response time3 hours
- Last delivery1 week
Languages
English, German
Hey, I'm Samuel, a Shopify specialist who handles everything from store builds to POS systems, custom app development, and API integrations.
I work across the full Shopify stack:
→ Shopify POS setup — point of sale, payment gateway, inventory sync, Toast & Square
→ Shopify store design — build, redesign, dropshipping, payments, SEO
→ Shopify app development — public apps, private apps, custom API integrations
→ Shopify app installation — B2B, B2C, third-party API connections
I deliver clean, documented work fast.
My Portfolio
FAQ
What is the difference between a Shopify public app and a private app?
A Shopify public app is listed on the Shopify App Store and can be installed by any merchant. A Shopify private app is built exclusively for one store and not publicly listed — ideal for custom automation, internal workflows, or proprietary integrations unique to your business.
Can you build a Shopify custom app from scratch?
Yes. I build fully custom Shopify apps from the ground up — including frontend UI, backend logic, API integration, and full Shopify store connection — all tailored precisely to your specifications and business requirements.
What APIs can you integrate with my Shopify app?
I can integrate virtually any third-party API — including payment gateways, shipping providers, ERP and CRM platforms, supplier APIs, inventory sync tools, TikTok Shop, Facebook Shop, and more — directly into your Shopify app or store.
Can you submit my app to the Shopify App Store?
Absolutely. I handle the entire Shopify App Store submission process — including OAuth setup, meeting Shopify's review requirements, and ensuring your public app passes all compliance and security checks for listing.
Do you support Shopify POS and payment gateway integration?
Yes. I develop Shopify POS extensions and apps that integrate with Shopify's point-of-sale system, and I can connect custom payment gateways to both public and private Shopify apps.
What technologies do you use for Shopify app development?
I work with Node.js, React, PHP Laravel, Ruby on Rails, and the Shopify CLI and Polaris UI framework. I always use the latest Shopify API versions and follow Shopify's official development best practices.
Will my Shopify app work with Shopify Plus?
Yes. All apps I build are fully compatible with Shopify Plus, including advanced checkout customization, multi-store setups, and enterprise-level API integrations exclusive to Plus merchants.
Can you fix or update my existing Shopify app?
Absolutely. I offer Shopify app debugging, feature additions, API migration, performance optimization, and full redesigns of existing public or private apps. Just share your project details and I'll assess the scope quickly.
Reviews
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J james078curry
Repeat Client
United States
Genuinely one of the best sellers I've worked with on Fiverr. Started with a simple app fix and ended up transforming my whole store. Incredibly fast, knows Shopify inside out, and always goes above and beyond. Already planning to come back for more work. Highly recommend
Up to $50
Price
4 days
Duration
S 
Seller's Response
Helpful?J james078curry
Repeat Client
United States
Samuel installed and configured the Shopify app exactly as requested. Everything worked perfectly, communication was smooth, and he completed the job quickly. He also helped fix a few setup issues I hadn't noticed. Highly recommend if you need a reliable Shopify expert!
Up to $50
Price
4 days
Duration
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J james078curry
Repeat Client
United States
Genuinely one of the best sellers I've worked with on Fiverr. Started with a simple app fix and ended up transforming my whole store. Incredibly fast, knows Shopify inside out, and always goes above and beyond. Already planning to come back for more work. Highly recommend
Up to $50
Price
4 days
Duration
S Seller's Response
Helpful?J james078curry
Repeat Client
United States
Samuel installed and configured the Shopify app exactly as requested. Everything worked perfectly, communication was smooth, and he completed the job quickly. He also helped fix a few setup issues I hadn't noticed. Highly recommend if you need a reliable Shopify expert!
Up to $50
Price
4 days
Duration
Helpful?
