BigCommerce Development Services for Stencil and Headless
Billion Game
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Stencil, Catalyst & custom apps

BigCommerce development services

Custom Stencil themes, headless and Catalyst storefronts, custom apps and integrations, B2B implementations, multi-storefront architecture, checkout customisation, and migrations. Most of our BigCommerce work exists because the platform gave a merchant a capability the app marketplace never filled in.

BigCommerce ships more natively than Shopify does at comparable plans, and charges no additional transaction fee on top of your payment gateway. The trade-off is ecosystem size: Shopify has an app for nearly everything, BigCommerce frequently does not, and the gap gets filled by custom development or by a manual process someone runs every Tuesday. Most stores we review are running the manual process.

Theme code, script load, catalogue structure, checkout configuration, API headroom, and the gaps you are working around · five business days

Scope it roughly estimating
What do you need
How you sell
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End to end
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What decides the number

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Indicative bands, not a quote. Budget for continuity as well as the build: BigCommerce's smaller developer pool means losing your development relationship costs more here than on Shopify.

Before you enquire

What you are actually looking for

Four things nearly every enquiry turns out to be about, in the words people actually use.

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The honest answer

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What you mean

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What we do about it

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What you end up with

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In practice

What the work looks like

Screens from live engagements, with client details removed.

The main view

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Scope

What we build

Thirteen kinds of work, including migrating merchants away from BigCommerce when the ecosystem matters more than the platform.

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Try it · interactive

Where BigCommerce stores actually get stuck

Six causes, and the recurring theme is a gap nobody filled. BigCommerce hands you capability and expects you to build the last mile. Tick what you recognise.

Developer scarcity is the real strategic risk. BigCommerce's developer pool is smaller than Shopify's, so continuity matters more. A store with no documented build and no ongoing relationship is more exposed here than on a platform where you can hire a replacement in a week.

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What each one costs you
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Nothing ticked yet. Pick whichever ones sound like your store and the cost of each appears here.
The under-rated part

What BigCommerce does better than Shopify

Worth stating plainly, because it is under-appreciated and it is why merchants choose it. The comparison is almost always written from the other side.

Capability The BigCommerce position
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And where Shopify wins

App ecosystem breadth, developer availability, theme marketplace depth, and sheer volume of published documentation and community answers. Those are real advantages and they matter operationally. Saying so is what makes the column above credible.

The practical read

BigCommerce suits merchants with B2B requirements, multiple storefronts, or checkout needs, who have or will fund a development relationship. Shopify suits merchants who want to solve problems by installing something. Neither is wrong; they are different operating models.

Frontend

Stencil, Catalyst, or headless?

Three real choices with genuinely different cost and maintenance profiles. Most published content does not lay this out clearly.

Stencil theme Catalyst Fully custom headless
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Our default recommendation is Stencil, built properly with a local development workflow. Most stores considering headless have a theme quality or script load problem, and neither is solved by changing frameworks. Where the requirement is genuine, Catalyst is now the sensible middle path rather than building a custom frontend from scratch.

Catalogue modelling

Options and variants

A small technical point that causes disproportionate problems, so we scope it explicitly.

Variants

Carry their own SKU, price, and inventory, and are tracked independently.

Options and modifiers

Change a product's configuration or price without being separately tracked.

Choosing wrong costs

Either inventory you cannot track, or a variant count you cannot manage.

The rule we apply

If you need to count it, price it independently, or report on it, it is a variant. If it is a customisation that does not affect stock, it is an option or modifier. Getting this wrong is one of the more expensive corrections in BigCommerce, because it usually means re-importing the catalogue and remapping every integration that references product identifiers.

Interactive · the opinionated bit

Is BigCommerce the right platform for you?

We would rather have this conversation before you spend on a build. Three questions, and a straight answer even when the answer costs us the project.

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What we would do

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The honest disqualifier: if you need a simple store launched quickly with no development relationship, the larger ecosystem will serve you better and we will say so rather than take the build.

BigCommerce genuinely fits when
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It probably does not when
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Both directions

Migrations

To BigCommerce

Commonly from Magento or WooCommerce, where merchants want hosted infrastructure without giving up B2B or multi-storefront capability. Catalogue mapped into a designed structure rather than imported into defaults, customers and order history, URL mapping with complete redirects, and integration reconnection.

Away from BigCommerce

Usually where the merchant's requirements have simplified and ecosystem access matters more than platform capability. We do this without treating it as a failure, and we will tell you when it is the right call.

The critical deliverable either way

The redirect map. BigCommerce URL structures differ from Magento's and WooCommerce's, so structure changes on almost every migration. We baseline with a full crawl before anything changes and monitor daily for thirty days after.

Deliverables

What you receive

The actual documents, not a sample deck built for the pitch.

Build spec

BigCommerce Stencil build plan

9,400 SKUs · 14 templates · 3 channels

01Stencil theme architecture 02Script and tag audit 03Catalogue and faceted search 04Multi-channel considerations 05Merchandiser handover
B Includes a theme handover doc
Report
Store health at handover
Core Web Vitals91
Theme maintainabilityDocumented
Search performance0.6s
Multi-channel readinessPartial

Multi-channel is the lowest bar and the one worth planning before you expand.

Priorities
Per-template report
Template Was Now
Home5.4s1.5s Category4.9s1.4s Product4.4s1.2s Search6.1s1.7s Cart3.8s1.0s

Largest Contentful Paint per template on mobile.

Handover
Pricing

BigCommerce development pricing

Integration depth and the size of the gap you are filling drive the number. Catalogue size mostly does not.

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Small Very large
03 · Anything else
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Get this scoped properly

An estimate, not a quote. Fixed price follows a scoping call, and where requirements are genuinely uncertain we run a paid discovery phase first.

Budget for continuity, not just the build. BigCommerce's smaller developer pool means the cost of losing your development relationship is higher than on Shopify. A documented build and an ongoing arrangement are worth more here than on any other hosted platform.

Fit

Who we work with

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Probably not us if you need a simple store launched quickly with no development relationship. Shopify's ecosystem will serve you better and we will say so.

Free · five business days

Get a free BigCommerce store review

Including a gap analysis: the requirements you are currently handling manually, and what it would take to automate them.

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Build walkthrough Screen share · {{ gLoomTime }}
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Requires store admin access. If your store is well built and the answer is to remove four scripts, we will tell you that.

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This is the most useful box on the form. Whatever you write here usually becomes the first thing we cost.

No sales sequence. If the honest answer is that another platform suits you better, we will say so.

Request received.

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Evidence

Before and after

The same view, before the work and after it.

Before
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A strong platform behind a storefront that most phones could not render.

After
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Same catalogue, same channels, a front end that finally matches.

Our stack

Billion Game runs your work through the same instruments the best in-house teams use.

Licences are on us, and every export we pull from them is yours to keep.

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Be wary of any agency whose reporting is a tool dashboard with their logo on it. Tools measure; they do not decide what matters, and every one of these will happily generate a hundred findings that change nothing. What you are paying for is the judgement about which three of those hundred are worth your developers’ time.

FAQ

BigCommerce development FAQs

Anything not answered here, ask us directly.

The short version

Build through the Stencil CLI in version control, model variants and options deliberately, govern Script Manager, respect the API rate limits in your architecture, and keep a documented build and an ongoing relationship. That last one matters more here than on Shopify.

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What are you doing manually because no app exists?

Free store review covering theme code, scripts, catalogue structure, API headroom, and the gaps you are working around. Five business days.

Get a free store review Get a scoped quote