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$
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I will build a custom shopify checkout extension using functions
Manish S
About this gig
Are you looking to customize your Shopify Checkout with advanced UI Extensions?
I am a Senior Shopify + Laravel Developer (8+ years) specializing in Checkout UI Extensions, Shopify Functions, App Extensions & custom backend logic.
I will create high-performance, scalable & secure checkout experiences that match your business flow.
What I Can Build
- Custom checkout input fields
- Delivery date selector
- Warranty / insurance add-on
- Donation or round-up logic
- Extra fees / surcharge calculator
- Checkout validations (GST/VAT, mobile, email)
- Discount logic via Shopify Functions
- Checkout Upsell / Add-on blocks
- Custom payment method rules
- Multi-step logic / conditional sections
Tech Stack
- Shopify Functions
- Checkout UI Extensions
- Theme App Extensions
- Laravel / Node.js backend
- REST + GraphQL API
- Webhooks
- App Bridge + Polaris
Why Choose Me?
- 8+ years of experience in Shopify + Laravel
- Worked on high-traffic apps & complex stores
- API integrations (Capillary, Razorpay, Shiprocket, Unicommerce etc.)
- Super fast delivery
- Excellent communication
- Clean code + full documentation
Delivery Includes
- Complete working extension
- Revision & support
Lets customize your Shopify Checkout!
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 Manish S
Manish S
Laravel SaaS API Expert with Shopify and Shopify Plus
- FromIndia
- Member sinceNov 2019
Languages
Hindi, English
Senior Laravel Developer with 8+ years of experience building scalable SaaS platforms, APIs, CRM/ERP systems, and Shopify integrations. I specialize in Laravel backend architecture, REST/GraphQL APIs, payment gateway integration (Stripe, Razorpay), Redis queues, and MySQL optimization. Successfully migrated 1.8M+ customers to Shopify and improved DB performance by 40%. Clean code, scalable systems, on-time delivery. Let’s build something powerful.
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FAQ
1. What are Shopify Checkout Extensions using Functions?
Checkout Extensions using Functions allow you to add custom logic directly into Shopify’s checkout (like custom validations, dynamic pricing, shipping rules, payment customizations, discounts, etc.) without slowing down the checkout. They run on Shopify’s serverless infrastructure and are the recomm
2. Do I need Shopify Plus for this?
Yes, currently Checkout Extensions (both Checkout UI Extensions and Functions) are only available on Shopify Plus stores.
3. How long does it take to build a custom checkout extension?
Simple extensions → 1–3 days Medium complexity → 3–7 days Highly complex logic → 7–14 days (or more) Exact timeline depends on your exact requirements.
4. Will the extension pass Shopify’s review and get approved?
Yes, I have 100% approval rate so far. I follow all of Shopify’s latest guidelines, best practices, and testing requirements before submission.
5. Can you modify an existing checkout extension?
Absolutely! Whether you have an old extension or one built by someone else, I can update, fix bugs, or add new features.
