I build Shopify stores, from theme to checkout.

I'm Fabien Chareun, a Shopify developer at Axome, a Shopify agency in France. Since 2023 I've worked with more than 120 brands there, including Parfums de Marly, Withings and the 24 Hours of Le Mans: custom themes, apps, Shopify Functions and checkout extensions.

Based in France.
I work in French and English.

See the work

Short clips of stores I worked on at Axome

Selected work

All projects

For Withings

Multi-market Horizon store, subscription and account connected to the external Withings app

Horizon theme and checkout app for one Shopify Plus store (41 countries and territories, 14 languages): product page, mega menu, service subscription as nested cart lines and 3 Functions.

41 countries & territories
14 languages

Shopify Plus, Horizon, Liquid, Web Components, Shopify Functions, Checkout UI extensions, Customer Account UI extensions
For Nourrir comme la nature

3 account types, each with its own prices, rules and display

Shopify Plus redesign of a pet store for dogs and cats: consumers, premium accounts and B2B clubs each get their own prices, rules and journey, enforced by 8 Functions and 24 Flow workflows.

13 Shopify extensions
24 Shopify Flow workflows

Shopify Plus, Liquid, Web Components, Shopify Functions, Shopify Flow, Customer Account UI extensions, Recharge
For Matière Première

Redesign, boxes and gifts with Shopify Functions

Redesign and custom features for a perfume house: build-your-own boxes, free gifts and samples handled by Shopify Functions, a cart drawer that separates paid and free items.

95–99 PageSpeed on desktop
4 checkout extensions

Dawn, Liquid, TypeScript, Shopify Functions, Checkout UI extensions, GSAP, Swiper
For Project X Paris

Pixel-perfect streetwear, multi-market fully custom Nosto and a vinyl footer

Custom multilingual Dawn theme for a music-inspired streetwear brand: Nosto collections and recommendations, vinyl footer, tabbed cart drawer and a Black Friday gift Function.

Dawn, Liquid, Web Components, GSAP, Nosto, Webpack, Shopify Functions
Personal initiative

My Claude Code tooling

The Claude Code skills, subagents and hooks I wrote for my day-to-day Shopify work, including 3 skills shared with the whole agency.

17 Claude Code tools
3 shared skills

Claude Code, Skills, Subagents, Hooks, Python, Bash, MCP

Some of the brands I've worked with

See all 30+ brands

ACO (24 Hours of Le Mans) 2026

Build

Official store redesign and discount Functions for logged-in Club members, covered by Vitest tests.
Baobab Collection 2023 – 2026

Ongoing support

Maintained the store's app (API upgrade, 9 checkout extensions documented) and shipped cart upgrades like gift wrapping.
Nutrimuscle 2023 – 2026

Ongoing support

Dedicated weekly slots for tickets, new features and urgent fixes.
Parfums de Marly 2026

Ongoing support

Weekly support for 4 stores: front-end updates, country-based gifts, per-market engraving, OneTrust consent.
Serge Blanco 2024

Build

Lead developer on the redesign: custom Instagram-connected section, color variants migrated to metaobjects, size guide.
Withings 2026

Build and support

Multi-market Horizon store, subscription and account connected to the external Withings app Case study

About

I came to web development through Le Wagon, then earned a second French bachelor-level (EQF 6) software developer qualification with OpenClassrooms while working at Axome as an apprentice. I've been a Shopify developer there since 2024.

Day to day that means custom themes, Remix and React Router apps, Shopify Functions in TypeScript and Rust, checkout extensions and the Claude Code tooling I built to ship faster.

2024 – now Shopify Developer, Axome
2023 – 2024 Shopify Front-end Developer, Axome (apprenticeship)
2021 – 2024 Software Designer and Developer, OpenClassrooms (EQF 6)
2021 Web Application Designer and Developer, Le Wagon (EQF 6)
2015 – 2020 Automotive refinish painter

Stack

Shopify

Liquid, Online Store 2.0 and theme blocks, Shopify CLI, custom apps (Remix / React Router, Prisma, Polaris, App Bridge), Shopify Functions in TypeScript and Rust, Checkout, Customer Account and Admin UI extensions, Admin GraphQL API, Section Rendering API, nested cart lines, selling plans (Recharge, Loop), API migrations, metafields, Markets, Shopify Flow.

Front-end

JavaScript (ES6+, Web Components), TypeScript, React, Preact, HTML5, CSS3 / SCSS, Webpack, Vite, esbuild, GSAP, Swiper, Figma to code.

Quality

Core Web Vitals, unit tests (Vitest), structured data (JSON-LD), hreflang and i18n, accessibility (ARIA, focus management, reduced motion), consent management.

Integrations

Klaviyo, Nosto, Recharge, Gorgias, Yotpo, Judge.me and many more.

AI and tooling

Claude Code (skills, subagents, hooks, plugins), Cursor, OpenCode, Antigravity, Multica, Model Context Protocol, Node.js, Python and Bash, Git and GitHub, Raycast.