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Our agency will do shopify plus development with checkout customisation, shopify functions
Cart Blender
Top Rated
Agency
About this gig
Shopify Plus development and checkout customisation work is nothing like standard theme customisation. Checkout Extensibility means building sandboxed Checkout UI Extensions, writing Shopify Functions for server-side logic like discounts and shipping rules, and styling through the Branding API instead of raw CSS.
As an official Shopify Plus Partner behind 500+ websites launched, the Cart Blender team build for Shopify enterprise requirements: UI extensions, Branding API and Functions paired together for a multi-market setup with complex integrations across your existing stack, all by an in-house Shopify developer team with 10+ years of experience.
To name a few, we've been working with Shopify Plus brands such as Harbour Lifestyle, Dose Juice, Nourish Savannah, Happy Gentleman, and Best Brilliance.
We adapt each build to what it actually needs, but here is what stays constant either way:
- Schema-driven development, zero hardcoding
- Intentional, on-brand design
- Fixed price for a fixed scope
- 30-DAY WARRANTY on every task
Ready to team up with an official Shopify Plus Partner? Message us for a free 30-minute Discovery call today!
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.
About this agency
Cart Blender
Agency
6 employees
Top Rated
- FromUkraine
- Member sinceSep 2018
- Avg. response time1 hour
- Last delivery3 days
Languages
English, Ukrainian, Spanish, German, French
Cart Blender is a migration-first Shopify Plus Partner behind 500+ store launches since 2018. We help merchants move off outgrown platforms to Shopify without losing SEO rankings, historical data, or brand identity.
We also design and build new Shopify websites from the ground up for new eCommerce brands, offer custom development, UI/UX design, and CRO optimisation services – all by a dedicated in-house team from start to finish.
Every project comes at a fixed price for a fixed scope, plus a 30-day post-launch SLA with guaranteed support.
Among our clients
Slurp
Food & Beverage Products Supplying/Manufacturing
Best Brilliance
Jewelry Manufacturing & Design
Portfolio
Other Website Maintenance Services we Offer
FAQ
Who'll work on my project? Do you outsource?
No, we do not outsource. Cart Blender is a 7-person in-house team, and the same specialists who scope your project build it from start to finish. Your store data never passes through a freelancer or third-party contractor - only the people you are actually talking to.
What Shopify Plus stores have you worked in the past?
Some of our Shopify Plus work includes Best Brilliance, Harbour Lifestyle, Happy Gentleman, Dose Juice, and Nourish Savannah. Message us with your industry and we can share the most relevant examples for your situation.
Do you handle B2B-specific setup?
Yes. We set up company accounts, tiered wholesale pricing, minimum order quantities, and net payment terms, using Shopify's native B2B features on Plus or dedicated wholesale apps depending on your plan. Message us your specific requirements so we can scope it properly.
Do you build custom logic with Shopify Functions?
Yes. Shopify Functions lets us build custom logic like discount rules, shipping methods, and payment customizations natively, without relying on third-party apps that slow down checkout. Available on Shopify Plus. Mention your use case so we can confirm feasibility.
What can actually be customized in checkout?
Quite a lot on Shopify Plus. Branding API handles colors, fonts, and logo across every step. Checkout UI Extensions add custom banners, upsells, or fields using React and TypeScript. Shopify Functions power custom discount, shipping, and payment logic behind the scenes.
Is the price fixed or will it change after the project start?
Fixed. We quote a fixed price for a fixed scope before work starts. If you request additional features or revision rounds outside the agreed scope and estimated hours, we'll flag it and quote separately before any extra work begins.
How can I share feedback? How will we communicate?
Mainly through Fiverr messages, where you can share feedback and files anytime. We also hold sync calls at least once every 2 weeks to review progress together. For larger projects, we can set up a shared Asana board (or join your task manager software) to track tasks and milestones in one place.
What does the 30-day warranty cover?
If the code we build does not work correctly because of something we missed, we fix it at no extra cost under warranty. If the issue comes from a new requirement or scope extension that was not part of the original brief, that is quoted separately.
What's the project timeline?
It depends on scope. We confirm your exact timeline during scoping, before work begins, so there are no surprises once the project is underway. How fast and clearly you provide feedback/input also plays a big role, so the timeline is a shared responsibility.
