I build the backend and the integrations behind e-commerce.

Partner brands and boutiques each ran their own Shopify store. The marketplace needed their products, stock and prices live on its own catalog without manual work, and without the usual sync bugs: phantom out-of-stock, recycled SKUs, price drift.

The multi-tenant Shopify app and ingestion pipeline that pulls products, inventory and locations from each partner store, normalizes them (size systems, currencies, duplicate SKUs) into the marketplace catalog model, and keeps stock and pricing in sync through webhooks. Metafield schemas for size systems and pricing data, per-partner token and scope management, recovery from API errors, and a daily audit job that flags anomalies before customers see them.

Node.js, TypeScript, PostgreSQL, RabbitMQ, Shopify Admin API (REST and GraphQL), webhooks, cron

25+ partner catalogs and 150,000+ products integrated; the marketplace catalog went from about 50,000 to 200,000 SKUs and order volume rose with it. A new partner is onboarded by installing the app, without custom development.

Desjoyaux, a French pool-equipment manufacturer, and Rouje, a Paris fashion label, both sold on Shopify but ran the rest of the business elsewhere: an ERP for orders and stock, a PIM for product data, logistics for fulfillment, point-of-sale systems for in-store sales. Nothing talked to anything.

Middleware services between Shopify and those systems. Orders out to the ERP, stock and prices back into Shopify, product data and media from the PIM into the catalog, fulfillment sync with the logistics side, stock sync with the point of sale. Retries, idempotency, alerting and a reconciliation report so the client could trust the numbers. Led the agency's backend team, reviewed their code, owned the architecture and the GitLab CI/CD pipelines.

PHP (Symfony), MySQL, Shopify Admin API and webhooks, SAP, Salesforce, Extrabat, DMDLog

Zero manual re-keying on the client side: orders, stock, product data and shipments move between Shopify and the business systems without anyone copying them.

For the 2025 new year the hotel wanted a greeting card its guests could compose online and share: a surrealist character assembled from elements drawn by the illustrator Jonathan Burton, a personal message, a prize draw, all reachable from a newsletter and a dedicated page. A static visual would not do; a video generated for each visitor would, if it stayed fast and looked right every time.

The generation pipeline and the front end. Each card is rendered on request: the visitor's choices (face, bust, legs, arms, accessories, then a title and a message) are composed by FFmpeg into an animated GIF video, synchronously, behind a PHP 8.3 and Twig application. The three-step flow in Alpine.js (personalise, enter the draw, share), with the Web Share API on mobile so the video goes straight into WhatsApp, Messages or Instagram, next to email, download and link. Entries fed the newsletter through the provider's API. I also owned hosting, deployment, CI and the performance work for the launch.

PHP 8.3, Twig, Alpine.js, FFmpeg, Web Share API, GitLab CI/CD

5,950 cards created and 41,000 emails sent, twice the initial target, with no paid amplification. Best Brand Editorial Innovation, Trophées Content' Innovations 2025 by All for Content.