Full-stack ecommerce

I build the systems behind modern ecommerce.

Storefronts, internal platforms, integrations and commerce infrastructure, architected and owned end to end.

Sites with systemsUnited Kingdom
Storefronts
Platforms
Integrations
Infrastructure
Selected work
Selected work02 spotlight

Two systems, owned from architecture through to production

01
B2B procurement portalAddex Group · 2025 – present
B2B procurement portal dashboard

A procurement portal that enforces how a company actually spends

Corporate customers needed structured purchasing controls across departments, teams and locations. Approvals ran on email, PDFs and spreadsheets, which meant delay and risk on every order.

I designed the permissions hierarchy, the budget architecture and the multi-level approval logic, then built it as a React application with PostgreSQL behind it, connected to Shopify through its APIs.

Role
Sole engineer: architecture, build, deployment
Stack
React · Remix · PostgreSQL · Prisma · Shopify Plus
Systems
Budget trees · approval chains · company price lists · pack sizes
Outcome
Spreadsheet approvals eliminated; reusable framework for further B2B automation
Read the full case study
02
Trade storefront & operational systemsLeach’s · 2022 – present
Leach’s storefront on mobile

The operational layer Shopify leaves to you

A large trade catalogue needed stronger discovery and purchasing flows, and the business needed operational features Shopify does not provide on its own.

I owned the storefront architecture and templates, then built the systems around it: pack bundles backed by a custom stock-relationship app, trade account onboarding, and a live order feed for the operations team.

Role
Storefront architecture, theme development, custom apps
Stack
Shopify Plus · Liquid · JavaScript
Systems
Pack bundles with linked inventory · trade signup · live order feed
Outcome
Trade buying journey and operational visibility handled inside Shopify
Read the full case study
Also delivered04 projects

More projects, each one built and run end to end.

Addex GroupTwo brands, reseller adapted portal and product landing pagesShopify · Liquid · React · 2022 – presentMAXVACDistributor-friendly buying, country-specific models and landing pagesShopify · Markets · Liquid · 2023 – presentDust ArrestIndustry landing pages, Commerce Toolbox and reliable cart updatesShopify · Liquid · 2022 – presentLeach’s CorporateCorporate site ordered around proof, sectors and case studiesShopify · Liquid · 2025 – present
ExperienceShopify since 2013

Twelve years on ecommerce platforms, three businesses

Addex Group2022 – present
Addex GroupLeach’sMAXVACDust ArrestFull-Stack Shopify Engineer

Owns technical development across a multi-brand Shopify environment: integration strategy, API design, data flow and performance. Built the role-based B2B spend platform and the internal tooling behind sales and marketing operations.

Shopify Plus · React · Remix · PostgreSQL
Zafco / Tire Streets2020 – 2022
Tire StreetsShopify Developer

Led technical redesign and development of the US, UK, ES and DE storefronts through a period of 100% year-on-year growth, supporting revenue expansion past £20m.

Shopify · Liquid · JavaScript
Gilmor Hair & Beauty2013 – 2020
GilmorShopify Developer

Designed and managed the storefront and supporting ecommerce systems, delivering custom platform functionality and performance work through a period in which revenue doubled. Acquired by Aston & Fincher.

Shopify · Liquid
Capabilities04 disciplines

How the work breaks down

01

Commerce platforms

Shopify Plus storefront architecture, theme systems, templates, merchandising structures and search for large trade catalogues.

02

Custom applications

React applications for purchasing, approvals, onboarding and internal operations, built on Remix and maintained in production.

03

Integrations & APIs

Shopify Admin and Storefront APIs, Shopify customer authentication, webhooks, background jobs and rate-limited third-party sync.

04

Data & operations

PostgreSQL and Prisma data models, linked inventory, live order feeds, catalogue generation and operational reporting.

About

I work with brands where the storefront is only part of the problem.

The work splits in two. There is the storefront, where better structure, search and buying journeys lift sales directly. Then there is the platform behind it: React applications that let ecommerce and operations teams run merchandising, pricing, purchasing and approvals themselves, rather than waiting on a developer or paying for another subscription per problem.

Based
United Kingdom
Works with
Shopify Plus · React · Next.js · Remix · Node.js · JavaScript · PostgreSQL · Prisma · Liquid · PHP
Brands
Leach’s · Addex Group · MAXVAC · Dust Arrest
Contact

Tell me what the system needs to do.

joseph@josephhackling.com
LinkedIn All work