Ecopassport

1. 01 Problem

   France's AGEC law requires environmental information on products. At Holis, it had to appear directly on e-commerce clients' product pages: third-party code, injected into pages we don't control, that must neither slow down nor break the host site, across 17 product categories.

2. 02 Solution

   A multi-tenant Node/Express TypeScript server, with PostgreSQL and Prisma, rendering the widget with React SSR. On the client, a ~16 KB dependency-free script injects it. I chose a client-side optimisation over a Redis cache: a component you don't build is a component you don't have to maintain.

3. 03 My role

   End-to-end owner from design to production, with about 60% of the commits. I validate every release with a load test and share the metrics with clients.

Technical highlights

• About 14 business modules covering 17 product categories.
• GitHub Actions CI and deployment on Azure App Service.
• JMeter campaign before every release, with 100 virtual users.
• Live at major e-commerce retailers (names under NDA).

Stack