✌️

Christian Mackie

London, United Kingdom

Hi! 👋

This is a simple place to access all of my notes related to building & designing solutions for Shopify. I have 12 years of experience both as a Shopify employee and a Technical Product Owner at Gymshark.

Find me everywhere else online via @mackiec or through my main website: mackiec.xyz

Posts Archive

Aug•22
Aug
22
2025
Building with Shopify's Dev MCP and Claude Code
Learn how to rapidly prototype and build Shopify discount functions and Admin UI Extensions using Claude Code and the Dev MCP
Jul•1
Jul
1
2025
Selected Samples Through Cart & Checkout
Providing sample selections in Cart, and then displaying them in Checkout
May•2
May
2
2025
Offering Gift Packaging via Checkout UI Extension
Building a UI Extension that offers a simple custom Gift message and a material choice.
Nov•21
Nov
21
2024
[2025] Guide to Shopify Checkout
A comprehensive overview of Shopify's Checkout and how to extend it to suit your requirements.
Oct•2
Oct
2
2024
Alternative Checkout for Custom Orders
Using Draft Order Invoice links as an alternative purchasing pathway to build totally unique checkouts.
Sep•11
Sep
11
2024
Adjust Prices via Checkout UI Extension
Modify a line item price based on additional selection options at Checkout.
Aug•29
Aug
29
2024
Conditional Delivery Instructions Input
Show an optional delivery instructions field at Checkout based on a customer's address.
Jul•29
Jul
29
2024
Designing Solution Workflows
Brainstorm a user journey or diagram to appropriately plan and build a solution to a problem.
Jul•15
Jul
15
2024
Informing Shopify Functions via UI External Network Access
Use a Checkout UI Extension to take input that generates an external request, and execute a Function on the response.
Jul•11
Jul
11
2024
Currency Adjusted Metafield with Liquid
Learn how to handle currency conversion for a price metafield in Shopify using Liquid and Cart Transform Functions within a multi-currency store.

Posts Archive

Building with Shopify's Dev MCP and Claude Code

Selected Samples Through Cart & Checkout

Offering Gift Packaging via Checkout UI Extension

[2025] Guide to Shopify Checkout

Alternative Checkout for Custom Orders

Adjust Prices via Checkout UI Extension

Conditional Delivery Instructions Input

Designing Solution Workflows

Informing Shopify Functions via UI External Network Access

Currency Adjusted Metafield with Liquid