INDEXIZ

BigCommerce Services

BigCommerce Customization that Makes Your Store Truly Yours

Stencil and Catalyst theme customisation, bespoke features, checkout changes and custom apps for BigCommerce merchants who have outgrown off-the-shelf templates.

MJSWDTAKBigCommerce brands customise with Indexiz
Customisation sprintsprint 4 of 6
BriefFeatures · DesignThemeStencil · CatalystAppsCustom logic · APIsCheckoutOptimised · Tested
✓Theme deployedCatalyst · Next.js · 94 Lighthouse
+27%conversion after redesign
60+BigCommerce themes customised
25+Custom apps delivered
90+Average Lighthouse score
5+Years on the platform
What we do

BigCommerce Customization Services

Everything from a tweaked product page to a fully custom headless storefront, delivered by developers who work in BigCommerce every day.

Stencil Theme Customisation

Custom Stencil themes and child themes: new page templates, Handlebars components, Page Builder widgets and performance tuning.

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Catalyst & Headless Storefronts

Next.js storefronts on Catalyst and the GraphQL Storefront API for brands that want full design freedom and speed.

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Checkout Customisation

Optimised checkout flows with the Checkout SDK, custom fields, gift options, B2B terms and payment method rules.

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Custom Features & Widgets

Product configurators, bundle builders, size guides, store locators and custom Page Builder widgets built as clean, upgrade-safe code.

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BigCommerce App Development

Private apps for your operations and public apps for the marketplace, built on the Management API, webhooks and the App framework.

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B2B Edition Set-up

Customer groups, price lists, quotes, company accounts and purchase approvals configured and extended on B2B Edition.

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Real use cases

BigCommerce Customisation Work

Furniture

Product configurator on Stencil

Fabric, size and leg options rendered live with price updates and a configured SKU added to cart.

+41%add-to-cart rate
Industrial

B2B portal with quick order

CSV quick order, saved lists, net terms and approval workflows built on B2B Edition.

55%orders placed self-serve
Fashion

Catalyst headless storefront

A Next.js storefront on Catalyst with edge caching and a redesigned mobile checkout.

1.1slargest contentful paint
Why Indexiz

Why Indexiz for BigCommerce Customisation

We build customisations the BigCommerce way, so your store stays fast, upgrade-safe and easy for your team to manage in the control panel.

Upgrade-Safe Code

Child themes, widgets and apps that survive theme and platform updates without rework.

Performance Minded

Lazy loading, image optimisation and lean bundles keep Core Web Vitals green.

Design Fidelity

Pixel-accurate builds from your Figma files with responsive behaviour checked on real devices.

Merchant-Friendly

Content stays editable in Page Builder and the control panel; no developer needed for daily changes.

Our approach

Customise Without Breaking the Platform.

We prefer native BigCommerce features and extension points first, then add custom code only where it earns its place.

Our process

A Simple Path to Success

A proven process to turn your ideas into powerful digital solutions.

01

Store Review

We audit your theme, apps and analytics to find what to customise and what to leave alone.

02

Design & Spec

We agree designs, acceptance criteria and the extension approach for each feature.

03

Build & QA

We develop in a staging store, test across devices and check performance before release.

04

Release & Support

We deploy, hand over documentation and support your team after launch.

FAQ

Frequently Asked Questions

Answers to the questions we hear most often. Need more detail? Talk to our team.

Stencil is right for most stores that need a custom look without a separate front end. Catalyst makes sense when you want a Next.js storefront, custom routing or content-heavy experiences. We help you decide during the review.

Yes. With the Checkout SDK and Optimized One-Page Checkout we can change layout, add fields, apply B2B rules and integrate payment methods while staying PCI compliant.

We build with child themes, widgets and apps that use public APIs, so platform updates do not overwrite your work. We also test after each major release.

Usually, yes. We review the code first; if it is heavily modified or slow we may recommend a clean rebuild on the same design.

Small features ship in one to two weeks. A full theme or Catalyst storefront typically takes six to ten weeks including design and QA.

Ready to customise?

Let's Build the BigCommerce Store Your Brand Deserves

Share your feature list or design files and we’ll send a scoped plan with timeline and fixed pricing.

Or schedule a free consultation

Serving organizations across the world.

PakistanHQ · Lahore
Saudi ArabiaRegion
UAERegion
United KingdomRegion
United StatesRegion