Shopify Engineering

Custom Shopify Solutions

Built Inside Shopify, Not Bolted Onto It

Every Shopify store eventually needs something the platform won’t do on its own — a bundle that prices itself, a fee that only applies to one kind of customer, stock that lives in someone else’s warehouse. We build those using Shopify’s own primitives, so they survive theme updates and don’t fight the platform.

  • Shopify Plus
  • Shopify Functions
  • Cart Transform
  • Metaobjects
  • Custom Apps
  • Admin & Storefront APIs

What We Build Inside Shopify

Organised by the Shopify mechanism that does the work, because that is what determines whether a build lasts.

01

Bundling & Dynamic Pricing

Merge separately-stocked products into a single purchasable bundle that prices itself as the customer configures it — while inventory still draws down on each component, so stock and fulfilment stay accurate.

Cart Transform · Shopify Functions
02

Conditional Checkout Logic

Fees, discounts and rules that fire on customer type, payment method or cart contents. Applied inside checkout and visible to the customer before they pay, rather than reconciled afterwards.

Functions · Checkout Extensibility
03

Client-Editable Content Models

Structured content your team extends without a developer — new bundles, new builder steps, new fitment data, all managed from the Shopify admin rather than booked in as a change request.

Metaobjects · Metafields
04

Custom Shopify Apps

Private apps holding the business logic Shopify has no setting for — built for your store, rather than configured out of a marketplace listing that almost fits.

Custom apps · App Bridge
05

Integrations & Live Data

WMS, ERP, carriers and review platforms wired in bidirectionally — live shipping rates returned into checkout, and webhooks keeping stock honest across every system that touches it.

Admin API · Carrier Service API · Webhooks
06

Storefront Engineering

Product finders, filtered collections, deep mega menus and cart experiences that go past Shopify’s native limits — built to stay fast on catalogues with thousands of SKUs.

Liquid · Storefront API · AJAX Cart
Common Requests

Problems We Get Handed Most

Pick a problem to see what we build for it, and which Shopify mechanism does the work.

lion@shopify: ~/solutions

lion solve custom-bundling

Problem
A kit is twelve SKUs. The customer wants to buy it once. Shopify wants to sell it twelve times.
What we build
Cart Transform merges the selection into a single bundle line with its own price, while inventory still draws down on each component — so picking, packing and stock counts stay correct.
Primitive
Cart Transform · Shopify Functions
Proven on
ProSpeed Racing
Client Work

Shopify Case Studies

Four Shopify stores that hit a native limit, and what we built inside the platform to get past it.

ProSpeed Racing

Configured kits, conditional fees, live carrier rates

  • Automotive
  • Shopify Plus
  • Cart Transform
  • Metaobjects
  • Custom Apps
  • Cart Transform merges a configured kit into one bundle line while stock still moves per component
  • Metaobjects define each builder step, so ProSpeed launches new bundles without a developer
  • Carrier Service API returns live StarShipIT rates into checkout
  • Custom app applies a 1.5% card fee to B2B customers paying by card — and nobody else
View Case Study

Titleys

A thousand colourways behind one size selector

  • Apparel
  • Shopify
  • Metaobjects
  • Custom Filtering
  • Metaobjects link individual colourway products into one parent swatch group
  • Waist × length collapsed into a single size selector without restructuring products or operations
  • Custom filter sidebar built over a catalogue of more than a thousand colours
View Case Study

Fishing Superstore

Fitment finding across a complex marine catalogue

  • Marine
  • Shopify
  • Liquid
  • AJAX Cart
  • Yotpo API
  • Boat Cover Finder — multi-step fitment wizard across 1,000+ SKUs
  • Smart cart with gift automation and spend-threshold progress
  • Four-level mega menu, past Shopify’s native three-level limit
View Case Study

Guitar Brothers

Selling stock that sits in the supplier’s warehouse

  • Music Retail
  • Shopify
  • Custom Apps
  • Supplier Portal
  • Supplier stock dashboard driven by CSV upload
  • “Available from supplier” — add to cart even when the website shows zero
  • Homepage rebuilt to merchandise the range
View Case Study
How We Work

Built To Survive Your Next Theme Update

Custom work on Shopify goes wrong in predictable ways. These are the four rules we hold to so it doesn’t.

Native primitives first

If Shopify has a mechanism for it, we use that mechanism — not a workaround that breaks at the next platform release.

Your team stays in control

Content models go in Metaobjects, so your merchandisers can extend them without booking developer time.

No app sprawl

One custom app doing your logic, instead of five marketplace apps fighting each other in the cart.

We work with your stack

Existing theme, existing agency, existing WMS — we integrate rather than insisting on a rebuild.

Words From Our Clients

  • Working with the team at LION Digital has been like a breath of fresh air. I almost gave up on working with an agency after 4 previous failed…

    Ben Martin
    Ben Martin Managing Director · G Life Watches
  • Fantastic Service and Staff. They were very friendly and easy to deal with, and gave a big boost to our online Traffic and Webstore.

    Jake Di Blasi
    Jake Di Blasi Managing Director · Pen City
  • I can’t say enough good things about Lion Digital! From start to finish, their team has been nothing short of outstanding. They took the time to really understand…

    Caitlin Probert
    Caitlin Probert Online Manager · Chempro Online
  • These guys know what they are doing!! We have just begun our partnership with Lion but from the get go we have found them to be very thorough…

    Tony Titley
    Tony Titley Chief Executive Officer · W. Titley & Co
  • Working with the Lion team on our ESP migration to Klaviyo was seamless. They were always transparent with information, reporting, updates and needs – he was like an…

    Heather Earl
    Heather Earl eCommerce & Digital Marketing Manager · Nutrition Warehouse
  • James (our director) and Tom (the sales lead) really like the design you made. I’m very happy with what we have done with the design template!

    Jenny Fang
    Jenny Fang Super Sleeper Pro
  • Where do I start? If you’re looking to invest in your eCommerce digital marketing, you won’t regret bringing LION on board. The entire team at LION are veterans…

    Stephen Brumwell
    Stephen Brumwell Operations Lead · CATALO Natural Health Foods Ltd.

Tell Us What Shopify Won’t Let You Do

Send us the thing your store can’t currently do. We’ll tell you whether it’s a Shopify Function, a custom app, or something you shouldn’t build at all.

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