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eCommerce ﹥ Shopify development

SHOPIFY STORE DEVELOPMENT FOR BRANDS THAT KEEP GROWING

A Shopify store that looks like your brand, sells on every device and keeps working when your team changes it. Flatline designs and builds Shopify and Shopify Plus stores for growing and enterprise brands: strategy, UX/UI, theme development, apps, integrations and launch, by one team. As a Shopify Platinum Partner we build and grow stores for brands such as Gisou, New Fysic and Van Poelgeest.

eCommerce ﹥ Shopify development

SHOPIFY STORE DEVELOPMENT FOR BRANDS THAT KEEP GROWING

A Shopify store that looks like your brand, sells on every device and keeps working when your team changes it. Flatline designs and builds Shopify and Shopify Plus stores for growing and enterprise brands: strategy, UX/UI, theme development, apps, integrations and launch, by one team. As a Shopify Platinum Partner we build and grow stores for brands such as Gisou, New Fysic and Van Poelgeest.

eCommerce ﹥ Shopify development

SHOPIFY STORE DEVELOPMENT FOR BRANDS THAT KEEP GROWING

A Shopify store that looks like your brand, sells on every device and keeps working when your team changes it. Flatline designs and builds Shopify and Shopify Plus stores for growing and enterprise brands: strategy, UX/UI, theme development, apps, integrations and launch, by one team. As a Shopify Platinum Partner we build and grow stores for brands such as Gisou, New Fysic and Van Poelgeest.

Black and white close-up of the front and headlight of a dark sports car in the rain, Van Poelgeest case
Black and white close-up of the front and headlight of a dark sports car in the rain, Van Poelgeest case
Smiling woman eating a healthy sandwich at a table with fresh vegetables, New Fysic case
Surfer riding inside a curling blue wave on a yellow longboard, Natural High case

What a Shopify build covers

We start with how your customers buy and how your team works. From there we design the store and a design system, build the theme with sections your team can rearrange without a developer, choose apps where they fit and build custom where they do not, connect your systems, load products and content, set up tracking and consent, and test real orders before launch. After go-live we stay to monitor, fix and keep improving.

PROVEN
RESULTS

Shopify total sales chart showing 42 percent growth
Shopify total sales chart showing 42 percent growth

TOTAL SALES VS. PREVIOUS PERIOD

+42%

+42%

+42%

+42%

+42%

+42%

Three men in summer fashion on a harbour quay

We build and grow digital platforms for brands that expect their commerce to perform, from fashion and beauty to mobility and consumer electronics. These are some of the companies we work with.

We build and grow digital platforms for brands that expect their commerce to perform, from fashion and beauty to mobility and consumer electronics. These are some of the companies we work with.

We build and grow digital platforms for brands that expect their commerce to perform, from fashion and beauty to mobility and consumer electronics. These are some of the companies we work with.

When Flatline is the right Shopify partner

Attendees listening to a talk at a Flatline eCommerce event
Office entrance with a glass meeting booth
Two colleagues discussing work at their desks

Global disruptor in custom development & end-to-end production partner

WHO WE BUILD FOR

We fit brands that sell seriously online or are about to: a range with variants and a story, several markets or languages, B2B next to B2C, stores next to the webshop, or a brand where design is part of the product. For a first store with a handful of products, a standard Shopify theme and a freelancer are often the better start. We will tell you that too.

Family with two young children next to an electric cargo bike in front of a townhouse

When Flatline is the right Shopify partner

Attendees listening to a talk at a Flatline eCommerce event
Office entrance with a glass meeting booth
Two colleagues discussing work at their desks

Global disruptor in custom development & end-to-end production partner

WHO WE BUILD FOR

We fit brands that sell seriously online or are about to: a range with variants and a story, several markets or languages, B2B next to B2C, stores next to the webshop, or a brand where design is part of the product. For a first store with a handful of products, a standard Shopify theme and a freelancer are often the better start. We will tell you that too.

Family with two young children next to an electric cargo bike in front of a townhouse

When Flatline is the right Shopify partner

Attendees listening to a talk at a Flatline eCommerce event
Office entrance with a glass meeting booth
Two colleagues discussing work at their desks

Global disruptor in custom development & end-to-end production partner

WHO WE BUILD FOR

We fit brands that sell seriously online or are about to: a range with variants and a story, several markets or languages, B2B next to B2C, stores next to the webshop, or a brand where design is part of the product. For a first store with a handful of products, a standard Shopify theme and a freelancer are often the better start. We will tell you that too.

Family with two young children next to an electric cargo bike in front of a townhouse
Gisou honey-infused hair care range with hair oil, conditioner, hair wash and hair mask beside honeycomb

Shopify or Shopify Plus

Shopify is enough for many brands. Shopify Plus becomes worth it when the business asks for more than one store can carry:

  • B2B on the same platform, with company accounts, price lists and payment terms.

  • Several expansion stores for countries, brands or wholesale.

  • Checkout customisation and custom logic with Shopify Functions.

  • Automation with Shopify Flow and scheduled launches for drops and sales.

  • High order volumes and traffic peaks.

Speed comes with the platform: in the HTTP Archive Web Almanac 2025, 76% of Shopify sites passed all Core Web Vitals on mobile, against 35% of WooCommerce and Magento sites.

We advise the plan that fits your next years, not the biggest one. More on Shopify Plus.

What a build includes

  • Discovery: goals, customers, range, markets, systems and requirements.

  • UX/UI design and a design system, built around the decisions customers really make.

  • Theme development with sections your team can fill and rearrange without a developer.

  • Apps where they fit, custom functionality where they do not, and as few apps as possible.

  • Integrations with ERP, PIM, WMS, POS and marketing tools.

  • Product data, content and, where needed, migration from your current platform.

  • Tracking, consent and product feeds, tested before launch.

  • QA on devices and on real processes: checkout, discounts, returns and fulfilment.

  • Launch, training for your team and aftercare.

Design is often the first question. See Shopify store design and Shopify integrations.

What a Shopify store costs

A Shopify build is not priced per page. The budget follows from a handful of drivers:

  • An adapted theme or a fully custom design.

  • The number of templates and custom sections.

  • Product data, content production and any migration of existing data.

  • Integrations with your systems.

  • Markets, languages and B2B.

  • Apps versus custom functionality.

On top come running costs. These are Shopify’s Dutch list prices (October 2026), per month: Basic €21 (yearly) or €28 (monthly), Grow €59 or €78, Advanced €289 or €384, and Shopify Plus from €2,100 on a three-year term. With Shopify Payments, iDEAL costs €0.29 per transaction (€0.15 on Plus) and cards 1.9% to 1.4% plus €0.25. With an external payment provider such as Mollie, Shopify adds 2%, 1%, 0.6% or 0.2% per order, depending on the plan. All costs are listed in Shopify costs. After a short discovery you get a scope and budget you can defend internally.

Approach and timeline

We work in fixed phases, so you know at every point what has been decided and what is still open. A store on an adapted theme takes weeks rather than months; a custom design with integrations, markets or B2B takes longer.

  • Discovery and scope.

  • Design, from key templates to the full design system.

  • Development and integrations, delivered in reviewable parts.

  • Content and product data.

  • QA and acceptance with your team.

  • Launch, monitoring and the roadmap for after go-live.

For reference: John Beerens went live with more than 20,000 SKUs, B2C and B2B in one Shopify store, in six to eight months. Stoov merged four stores into one Shopify Plus store with Markets and saw 13% higher conversion and 50% faster pages.

Plan backwards from your peak. To sell on Shopify on Black Friday 2027 (26 November), we count six weeks for the scan, four for scope, about twenty for build, migration and testing, and six for launch and hypercare, followed by a code freeze from early November. In practice: the decision has to be made in February 2027.

Shopify stores we build and grow

F.A.Q.

We’d love to answer all your questions

What does it cost to have a Shopify store built?

That depends on a few drivers: an adapted theme or a fully custom design, the number of templates and custom sections, product data and any migration, integrations, markets and B2B, and the share of custom functionality. On top come running costs: Shopify starts at €21 a month (Basic, yearly) and Shopify Plus at €2,100, plus apps and payment costs. After a short discovery you get a scope and budget you can defend internally.

How long does it take to build a Shopify store?

A store on an adapted theme takes weeks rather than months. A custom design with integrations, several markets or B2B takes longer. The discovery fixes the timeline, because it shows the dependencies: content, product data, decisions and the systems that have to be connected.

Do we need Shopify Plus?

Not always. Many brands start well on Shopify. Plus becomes worth it with extensive B2B, several expansion stores, checkout customisation, automation at scale or high volumes. We look at your plans for the coming years and advise the plan that fits, not the biggest one.

Can our team manage the store after launch?

Yes. We build with sections and templates your team can fill and rearrange themselves, and we document the rules of the design system. Before launch we train the people who will run the store, so campaigns and new pages do not wait for a developer.

Do you also help after launch?

Yes. After launch we keep developing the store, improve conversion and can run email and paid marketing. For New Fysic we combined Shopify Plus with Klaviyo and an ads strategy; for Gisou we keep improving speed and UX for customers in more than 30 countries.

F.A.Q.

We’d love to answer all your questions

What does it cost to have a Shopify store built?

That depends on a few drivers: an adapted theme or a fully custom design, the number of templates and custom sections, product data and any migration, integrations, markets and B2B, and the share of custom functionality. On top come running costs: Shopify starts at €21 a month (Basic, yearly) and Shopify Plus at €2,100, plus apps and payment costs. After a short discovery you get a scope and budget you can defend internally.

How long does it take to build a Shopify store?

A store on an adapted theme takes weeks rather than months. A custom design with integrations, several markets or B2B takes longer. The discovery fixes the timeline, because it shows the dependencies: content, product data, decisions and the systems that have to be connected.

Do we need Shopify Plus?

Not always. Many brands start well on Shopify. Plus becomes worth it with extensive B2B, several expansion stores, checkout customisation, automation at scale or high volumes. We look at your plans for the coming years and advise the plan that fits, not the biggest one.

Can our team manage the store after launch?

Yes. We build with sections and templates your team can fill and rearrange themselves, and we document the rules of the design system. Before launch we train the people who will run the store, so campaigns and new pages do not wait for a developer.

Do you also help after launch?

Yes. After launch we keep developing the store, improve conversion and can run email and paid marketing. For New Fysic we combined Shopify Plus with Klaviyo and an ads strategy; for Gisou we keep improving speed and UX for customers in more than 30 countries.

F.A.Q.

We’d love to answer all your questions

What does it cost to have a Shopify store built?

That depends on a few drivers: an adapted theme or a fully custom design, the number of templates and custom sections, product data and any migration, integrations, markets and B2B, and the share of custom functionality. On top come running costs: Shopify starts at €21 a month (Basic, yearly) and Shopify Plus at €2,100, plus apps and payment costs. After a short discovery you get a scope and budget you can defend internally.

How long does it take to build a Shopify store?

A store on an adapted theme takes weeks rather than months. A custom design with integrations, several markets or B2B takes longer. The discovery fixes the timeline, because it shows the dependencies: content, product data, decisions and the systems that have to be connected.

Do we need Shopify Plus?

Not always. Many brands start well on Shopify. Plus becomes worth it with extensive B2B, several expansion stores, checkout customisation, automation at scale or high volumes. We look at your plans for the coming years and advise the plan that fits, not the biggest one.

Can our team manage the store after launch?

Yes. We build with sections and templates your team can fill and rearrange themselves, and we document the rules of the design system. Before launch we train the people who will run the store, so campaigns and new pages do not wait for a developer.

Do you also help after launch?

Yes. After launch we keep developing the store, improve conversion and can run email and paid marketing. For New Fysic we combined Shopify Plus with Klaviyo and an ads strategy; for Gisou we keep improving speed and UX for customers in more than 30 countries.

Planning a new Shopify store?

Tell us about your brand, range, markets and timing, and what the current store does not do well. We reply with a first view on scope and approach, and suggest a short call to walk through it.

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What do they say

4.9 out of 5 · 145 reviews

Google reviews
Clutch reviews
Sortlist reviews
Shopify Partner Directory reviews

What do they say

4.9 out of 5 · 145 reviews

Google reviews
Clutch reviews
Sortlist reviews
Shopify Partner Directory reviews

What do they say

4.9 out of 5 · 145 reviews

Google reviews
Clutch reviews
Sortlist reviews
Shopify Partner Directory reviews

We’d love to hear about your project.

We’d love to hear about your project.

We’d love to hear about your project.