Shopify Plus development for high-volume brands

I build on the features you pay Plus for: checkout extensions, Shopify Functions, B2B, expansion stores and custom apps. Every project gets a fixed quote, in writing, after a free review.

Working to a budget? Tell me what you can spend and I’ll fit the scope to it. For first-time clients, the consultation and plan are free. Discuss your budget

  • Shopify Select Partner
  • 4.96 average from 719 reviews
  • 1,000+ Shopify projects delivered
  • Fixed quote after a free review

Starting from

$300USD

Get an exact quote

What you pay Plus for

A Plus licence doesn't make a store better on its own. It opens up features someone has to build on, and that's where the value sits. As checked on Shopify's Help Center and developer docs on 7 November 2026, the main ones are: apps that customise the information, shipping and payment steps of checkout, custom apps that use Shopify Functions, up to 9 expansion stores, unlimited staff accounts, up to 100 themes in the theme library and up to 20,000,000 URL redirects.

Checkout is the big one. On other plans, checkout apps are limited to the thank you and order status pages. On Plus, I build checkout UI extensions for the steps where buyers decide, and use the Checkout Branding API for the look. Shopify Functions handle the logic: discounts, payment and delivery rules, cart and checkout validation. Public apps with functions work on any plan, but only Plus stores can run custom apps that contain them, so the rules can be written for your business rather than someone else's.

B2B is the other common reason to upgrade. Basic, Grow and Advanced now include Shopify B2B with up to 3 active catalogue assignments. Plus removes that cap, lets you assign a catalogue directly to a company location, and adds deposits, partial payments and payment requests per fulfilment. Shopify Flow can also run tasks from custom partner apps, on Plus only.

If you're still weighing the upgrade, start with Shopify vs Shopify Plus. If you're already on Plus and paying for features nobody has built on, that's the work I do. Custom apps through my app development service start from $800. Plus development starts from $300, with a fixed quote in writing after a free review.

Signs you need this

  • You're on Plus, but checkout looks and works the same as it did on Advanced.
  • Your discount, shipping or payment rules need a stack of apps that still can't do what you want.
  • You sell wholesale and have outgrown 3 B2B catalogues, or need deposits on large orders.
  • You run, or plan, separate stores for the UK, EU, US or Australia.
  • Your team spends hours on manual tasks that Flow and a custom app could handle.

What the service includes

Checkout extensions

Checkout UI extensions on the information, shipping and payment steps, styled with the Checkout Branding API to match your brand.

Shopify Functions

Custom discount, payment, delivery and validation rules built into a custom app, which only Plus stores can run.

B2B on Plus

Catalogues assigned per company location, deposits, partial payments and payment requests per fulfilment, set up and tested with real orders.

Expansion stores

Up to 9 expansion stores for countries or brands, with a clear plan for which products, prices and content are shared, and a theme licence for each live store.

Custom apps and integrations

Apps that connect Shopify to your ERP, warehouse or other systems through Shopify's APIs, with higher API rate limits requested from Shopify where needed.

Flow automations

Shopify Flow workflows for tagging, alerts and approvals, including tasks from custom apps, which Flow supports on Plus only.

Why build Plus with me

01

Shopify's own tools first

I build on checkout extensions and Functions before reaching for scripts or workarounds, so there's less fragile code for you to maintain.

02

Conversion thinking in every build

I also run CRO work, so checkout and product changes are judged by whether they help buyers finish an order, not by how clever they are.

03

Shopify Select Partner, 1,000+ projects

A 4.96 average from 719 reviews, with clients in the UK, Netherlands, US and Australia. A specialist team, led by me, does the work, and you deal with me throughout.

How it works

  1. 1

    Free review

    I look at your store, apps, checkout and plans, then send three points on where Plus features would make the biggest difference.

  2. 2

    Fixed quote and scope

    You get a written scope, timeline and fixed quote. Nothing starts until you've agreed it.

  3. 3

    Build and test

    Extensions, functions and apps are built and tested on a development store or unpublished theme, with your real products and test orders.

  4. 4

    Launch and support

    Changes go live at a quiet time, I watch orders and checkout closely afterwards, and you get documentation for everything built.

Is this service right for you

A good fit

  • You're on Plus, or committed to moving, and want more from it.
  • Your discount, shipping or payment rules go beyond what off-the-shelf apps offer.
  • You sell B2B and direct to consumers, or want to, from one Shopify setup.
  • You sell in several countries and need separate stores or tight control by market.
  • You want one accountable lead, not a different freelancer for each job.

Not the right fit

  • You're on Grow or Advanced and its B2B tools and checkout apps already cover you. Plus may not pay for itself yet.
  • You need a small theme change. My standard store design and development work is a better fit.
  • You haven't decided on the Plus plan yet. Settle that first, and I'm happy to help you weigh it.

Plus, used or unused

AspectPlus out of the boxPlus, developed
CheckoutStandard editor settingsExtensions on key steps
Discount logicBuilt-in and app rulesFunctions for your rules
B2B pricingDefault cataloguesPer-location prices, deposits
AutomationManual tasksFlow with custom app tasks
IntegrationsExports and spreadsheetsCustom app syncing data
InternationalOne store for every marketExpansion stores, planned

What you get at handover

Technical documentation

What each extension, function and app does, where it lives and how to change its settings.

Test record

Every checkout path, discount rule and B2B flow tested, with the result of each test order.

Ownership list

Every app, its permissions and its monthly cost, with everything registered to your business, not to me.

Next-step plan

What I'd build next on Plus, in order of likely impact, so you can plan the coming months.

Why brands choose to work with me.

More about Ashraf
Ashraf Siddik

A specialist team, led by me

I lead every project personally, and a team of Shopify specialists helps me deliver faster across CRO, design, development, apps and automation.

1,000+Shopify projects completed

Decisions backed by data

Changes start from customer behaviour, analytics and recordings, not guesswork.

Built around revenue

Design and code are judged by what they do for conversion and order value.

Direct communication

You work with me directly, with working-hour overlap with the US, UK and Europe.

Shopify Select Partner

Listed at Select tier in the Shopify Partner Directory, with 7+ years on the platform.

Trusted by brands in 35 countries

355+ clients and a 4.96 average rating from 719 reviews.

Start a project

What store owners say.

4.96 from 719 reviews
  • I am writing to highly recommend Ashraf, who I had the pleasure of working with on Fiverr. Ashraf is an exceptional worker who consistently delivers high-quality work with excellent attention to detail.

    I hired Ashraf to code something in my website. Throughout the project, he demonstrated exceptional communication skills and was always responsive to my inquiries and concerns. He also was proactive in seeking my feedback and ensuring that the final product met my expectations.

    joerismash

    Netherlands

    Shopify Custom Coding & CRO
  • Ashraf is an outstanding developer who transformed my website beyond my expectations. He not only delivered on every request promptly but also enhanced the site with his expertise. Communication was excellent throughout the process, and the delivery was impressively fast, showcasing Ashraf's commitment to customer satisfaction. I highly recommend Ashraf for anyone seeking a skilled and reliable developer to elevate their website.

    gleamify_be

    Belgium

    Shopify Store Design & Redesign
  • Extraordinarily great work. Very fast and even added some extra details. Ashraf's dedication and attention to detail are truly impressive. He ensured that every aspect of the website was polished and functional, going above and beyond to deliver a product that exceeded my expectations. Communication was smooth and efficient, making the entire process a breeze. I highly recommend his services!

    jens1905

    Netherlands

    Shopify Custom Coding & CRO

Your questions, answered.

What store owners ask before starting this kind of project.

Ask me about your store
How much does Shopify Plus development cost?

It starts from $300 for focused checkout work, such as a checkout extension. The exact price depends on what's being built: a checkout extension is a very different job from an ERP integration. I review your store for free and send a fixed quote, in writing, before any work starts. Custom app work starts from $800.

Do I need Shopify Plus to customise checkout?

For the information, shipping and payment steps, yes. Shopify lists apps that customise those steps, and the Checkout Branding API, as Plus only. On Basic and above, apps can still add to the thank you and order status pages.

What's the difference between Plus and Advanced for B2B?

Both include Shopify B2B with companies, net terms, quantity rules and volume pricing. Advanced allows up to 3 active catalogue assignments across B2B markets. Plus has no cap and adds direct company catalogues, deposits, partial payments and payment requests per fulfilment.

What does the Shopify Plus plan itself cost?

Shopify's Plus plan page lists the lowest fee as $2,300 a month on a 3-year term, or $2,500 a month on a 1-year term, as checked on 7 November 2026. Higher-volume stores may also pay a variable platform fee. That's paid to Shopify, separately from any development.

Can you work alongside our in-house team or agency?

Yes. I can build specific extensions or apps while your team handles the rest, and I document everything so your developers can maintain it. You still have one point of contact: me.

Do expansion stores need their own theme?

Shopify says each live expansion store needs its own theme licence. Plus supports 9 expansion stores, and I plan which products, prices and content are shared and which differ by store before anything is built.

Can you help us move onto Plus?

Yes. I check whether your current store should simply move to the Plus plan or be rebuilt, and what changes in apps, checkout and B2B once Plus is active, then quote for the work.

How long does a Plus project take?

It depends on scope. One checkout extension and a multi-store integration are very different jobs. The timeline is written into the quote, and I flag anything that depends on your team or a third-party app.

Free 3‑point store review

Three fixes for your store, free.

  1. 1
    Send your storeTakes about a minute
  2. 2
    I review it by handOn mobile and desktop, not by a tool
  3. 3
    Get three ranked fixesBy email, free, with no obligation

“Very professional and deep understanding of the Shopify ecosystem. Friendly and proactive communication. Delivered on time with good quality”

Verified client, United Kingdom
4.96 from 719 client reviews

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