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E-commerce

Ecommerce website development for your business.

Make choosing a product, paying and ordering straightforward. We connect your catalog, payments and shipping on Shopify or Next.js. Your proposal sets the scope, price and timeline.

Talk to usHow quotes work
The moravamodern.com home page on a desktop screen
The moravamodern.com home page on a phone: the headline, a catalog button and a visualization of the Cascade villa
moravamodern.com · the site of CAD ART, our family practice
Or message us now:
Jovan and Branko

Our family architecture practice's site, projektikuce.rs, built and ranked by us: 58,000+ visitors in 12 months, 78% from Google, €0 spent on ads.Source: Vercel Web Analytics · projektikuce.rs · 09/2025–09/2026

Outcomes

From product to order.

A store earns its keep in three places: the product page, the checkout and the data you keep afterward.

Speed

Product pages optimized for speed

A store we code in Next.js is handed over with Lighthouse mobile Performance 95+, written into the contract: if the score is lower, we fix it for free. On a Shopify theme we optimize home, category and product pages the same way: the first product photo loads right away, and the rest only when the shopper reaches them. We don't guarantee the score there, because Shopify and its apps load part of the code. On a headless Next.js storefront, the guarantee covers the storefront.

Sales

A simpler path to a finished purchase

Cards, Apple Pay and Google Pay, shipping costs shown before the last step, and guest checkout, so nobody has to invent a password to pay you.

Ownership

Your store, your data

The store runs on your own Shopify or Stripe account, the domain is in your name, and product and customer data stay with you.

From click to doorstep

The whole order, connected.

An online store is a chain. We connect every link, so an order moves from product page to delivery without anyone copying data by hand.
  1. 01

    Product

    • Variants and stock
    • Product schema
    • view_item event
  2. 02

    Cart

    • Shipping estimate
    • Discount codes
    • add_to_cart event
  3. 03

    Checkout

    • Guest checkout
    • Taxes by market
    • begin_checkout event
  4. 04

    Payment

    • Stripe
    • Shopify Payments
    • Apple Pay
    • Google Pay
  5. 05

    Fulfillment

    • Order emails
    • Carrier rates
    • Tracking links

Payment methods depend on the country your business is registered in. We confirm what's available before we quote.

Payments, taxes, currencies

The money side, handled.

For most stores the payment question is simple: Shopify Payments if you sell on Shopify and it's available in your country, Stripe if you go headless. Both take the major cards, Apple Pay and Google Pay, and both can add local methods in the markets that use them.

Read more

Taxes are configured, not guessed. We set up tax collection for the markets you sell to, including EU VAT under the One-Stop Shop scheme and US sales tax in the states where you're registered. We don't give tax advice; your accountant confirms the rules and the store applies them.

Selling across borders? A multi-market store handles several currencies and languages with prices set per market, so each country sees a rounded local price instead of a raw conversion. Each market gets its own URLs and hreflang, which our SEO work builds on.

Shipping is part of the checkout, not an afterthought: carrier-calculated or flat rates, free-shipping thresholds and local pickup, all visible before the customer reaches the payment step.

Only need a business site for now? Start with custom website design and add the store when you're ready.

What's included

Everything a store needs to launch.

This is the base of every store we build. A headless storefront, several currencies and languages or custom checkout flows come in when the business needs them, and the proposal states the exact scope.
  • Store design: home, category, product, cart and checkout
  • A customized Shopify theme or a custom Next.js storefront
  • Products entered or migrated from your current store, as scoped in the proposal
  • Shopify Payments or Stripe, with Apple Pay and Google Pay
  • Shipping zones, rates and tax settings
  • Filters and search that work on a phone
  • Product, offer and breadcrumb schema
  • GA4 e-commerce events from product view to purchase
  • Order and shipping emails in your brand
  • Templates for terms, returns and privacy pages
  • Training on products, orders and discounts
  • 30-day bug-fix warranty after launch

Platform

Shopify or headless ecommerce?

We choose the platform for your payment provider, catalog, integrations and the people who will run the store, not out of habit. The proposal recommends one and explains why.

Option A

Shopify

A proven admin, hosted checkout and a large app ecosystem, with a theme we customize to your brand.

Read more

Choose it when

  • You want to launch quickly and run everything from one admin
  • Shopify Payments is available in your country
  • Your catalog fits a theme with custom sections

Trade-off

Themes limit layout and speed, and monthly app fees add up as you grow.

Option B

Headless Next.js

A custom Next.js storefront on Shopify or Medusa. The same products and orders, with full control over speed and design.

Read more

Choose it when

  • Speed and organic search are your main growth channels
  • You sell in several languages and currencies
  • You need custom checkout flows, B2B prices or ERP sync

Trade-off

A bigger build up front, and bigger changes need a developer or agreed maintenance.

Process

Four steps to your store's launch.

Payments and shipping get tested with real orders before a single customer sees the store.
  1. 01

    Brief

    We map your catalog, payment provider, carriers and markets before we quote. Then you get a proposal with the scope, price and timeline.

    Proposal

  2. 02

    Design

    Category, product, cart and checkout are designed in Figma around your real products, not placeholders.

    Revision rounds set in the proposal

  3. 03

    Build

    Products are imported, payments run in test mode, and shipping and taxes are configured. You place test orders on a private preview.

    Test orders before launch

  4. 04

    Launch & care

    We switch payments to live, redirect old product URLs, submit the sitemap and train your team on orders and discounts.

    30-day bug-fix warranty

Product SEO

Products Google can read.

Rich results need clean product data. Every product page ships with Product and Offer markup: price, currency, availability, brand and SKU, plus shipping and return details when you have them.
product.jsonldExample
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Oak cutting board, 40 cm",
  "sku": "OAK-CB-40",
  "brand": {
    "@type": "Brand",
    "name": "Your Brand"
  },
  "offers": {
    "@type": "Offer",
    "price": "49.00",
    "priceCurrency": "EUR",
    "availability": "https://schema.org/InStock",
    "hasMerchantReturnPolicy": {
      "@type": "MerchantReturnPolicy",
      "merchantReturnDays": 14
    }
  }
}
Example markup. On your store, every value comes from the catalog.
Read more
  • Unique titles and descriptions for every product and category
  • Canonical URLs for variants and filtered pages, so filters don't create duplicate content
  • Category pages written for search, not just product grids
  • Correctly sized AVIF and WebP images with descriptive alt text

Project

Selling plans online.

Morava Modern is the house-plan store of CAD ART, our family's architecture practice: a filtered catalog, several packages per plan, and an order flow that turns a choice into an invoice.
  • Next.js 16
  • Product schema
  • Filters
  • Order flow
Catalog
Plans filtered by size, bedrooms, levels and style, grouped into collections, each with a gallery and package options.
Checkout
An order request reaches us by email and an invoice follows. The checkout layer is built so a card provider can be added without touching the form.
Performance
99
Accessibility
100
Best practices
100
SEO
100

Measured with Lighthouse (mobile), .

View the projectVisit site (opens in a new tab)

We built for ourselves first

We sell online too.

Morava Modern and projektikuce.rs belong to CAD ART, our family's architecture practice. On Morava Modern, a buyer abroad chooses a house plan and sends an order request. We built both, so we know what a product page has to answer before anyone orders.

Read more

Over the 12 months to September 2026, projektikuce.rs had 58,000+ visitors, and 72% of visits came from a phone. That's why we design product pages and the checkout for the phone first, then scale up to desktop.

Jovan & Branko MilivojevićArchitects · founders of Kvant Studio

See the projektikuce.rs project
Projektikuce.rs, our family practice's site, measured
visitors in 12 months
58,000+
of visits on a phone
72%
visitors from Google
46,000+

€0ad spend

100% organic. No Google Ads, no sponsored posts since launch. About 78% of visitors came straight from Google.

Source: Vercel Web Analytics · projektikuce.rs · 09/2025–09/2026

How we price

A clear scope. A written quote.

After a short exchange you get a proposal with the exact scope, price and timeline, before we start. Third-party costs, such as your Shopify plan and payment processing fees, are listed separately.

Request a quoteHow quotes work

What shapes the scope and price

  • Catalog size, variants and who enters the products
  • Platform: Shopify or a headless Next.js storefront
  • Payment providers and the markets you sell to
  • Shipping zones, carriers and taxes
  • Integrations such as ERP, inventory or a newsletter
  • Languages, currencies and migration from your current store

How quotes work

  1. 1You send a few sentences about your business and what you need.
  2. 2We clarify the details, in writing or on a short call.
  3. 3You get a proposal with the exact scope, price and timeline.

What we guarantee in the contract

  • Lighthouse mobile Performance 95+ at handover for everything we code in Next.js, or we fix it for free.
  • The launch date is in the contract, and so is how much less you pay if the delay is on us.
  • For 30 days after launch we fix bugs for free.
  • You approve the design. Your proposal sets the number of revision rounds; extra changes and their price are agreed in writing first.
  • The total in your proposal covers the whole agreed scope.
  • The domain is registered in your name from day one. After the final payment, the code, design files and content belong to you. You choose who you work with next.

The Kvant Partner approach

A store is more than a checkout.

Payments, shipping, tracking and what happens after the sale decide whether a store makes money. We set them up, run test orders before launch, and tell you which extras are worth it and which aren't. Every connection is listed in the proposal, with its price, before you sign.

Kvant Partner

  1. Strategy
  2. Build
  3. Connect
  4. Grow

After handover, your choice

  • Yourself
  • With us
  • With someone else
How the Kvant Partner approach works

What we connect for an online store

  • Payment gateway

    Shopify Payments or Stripe, with Apple Pay and Google Pay. We help with the provider's onboarding and run test payments before launch.

  • Shipping and tracking

    Carrier or flat rates at checkout, and a tracking link in the shipping email, so customers don't have to ask where their order is.

  • GA4 e-commerce

    Every step from product view to purchase, so you can see where buyers drop off and which products sell.

  • Search Console and product data

    Product schema and a sitemap that update with your catalog, and Search Console to flag errors early.

  • WhatsApp and Viber

    For the questions about size, stock or delivery that stand between a visitor and an order.

  • Newsletter for repeat buyers

    People who bought once hear about new products and offers, through a newsletter tool connected to your store.

FAQ

E-commerce questions.

How much does an ecommerce website cost?

The price follows the scope of your store: catalog size, platform, payment providers, markets and integrations. After a short exchange you get a proposal with the exact scope, price and timeline, before we start. Third-party costs are listed separately in the proposal, including your Shopify plan, payment processing fees and any paid apps.

Shopify or a custom headless store?

Start with Shopify if you want a proven admin and a fast launch. Go headless when speed, content and multilingual SEO drive your sales, or when a theme can't do what your checkout needs. The proposal names one and explains why.

Can you build a headless Shopify store?

Yes. We build headless Next.js storefronts on Shopify or Medusa, with multi-currency, multilingual pages and custom checkout flows. The proposal spells out what your storefront includes; here is how quotes work.

Which payment methods can I accept?

With Shopify Payments or Stripe you can take cards, Apple Pay and Google Pay, plus local methods such as iDEAL or SEPA Direct Debit where they are supported. Availability depends on where your business is registered, so we check it before we quote.

Can you migrate my store from WooCommerce or another platform?

Yes. Product migration is part of the build, and the proposal states how many products move. Old product and category URLs get 301 redirects to the new ones, so search engines and existing links find the new pages. Moving customers and order history depends on the source platform, and we scope it in the proposal.

How do you handle VAT and sales tax?

We configure tax collection in Shopify or with Stripe Tax for the markets you sell to, such as EU VAT under the One-Stop Shop scheme or US sales tax where you're registered. Your accountant confirms the rules, and the store applies them to every order.

How long does it take to build an ecommerce website?

An online store usually takes 5 to 12 weeks, depending on the catalog, payments and integrations. The exact timeline is in the proposal, and the launch date goes into the contract. After launch you add products, run discounts and ship orders in the admin yourself. For new features and monitoring, we offer maintenance scoped to your store.

Related reading.

Ready to sell online?

Send us a link to your current store or a short description of your catalog. We will help you work out what you need and suggest a next step.

Talk to us

Or email jovan@kvant.studio