Freelancer profile translated to English.
Back to original languageAbout Julien
Freelance senior front-end developer, 42 school graduate, with 5 years of experience at Fnac Darty on the most visited pages of fnac.com (product page, homepage, search results — 100,000+ views/day).
Key contributions:
• Creation and maintenance of an internal NPM library of Web Components (native Custom Elements), used by 3 front-end teams
• Implementation of the Design System: SCSS design tokens, shared ESLint/Babel configurations
• Redesign of SMILE, an internal CMS used by ~50 editors across 8 European markets (FR, BE, CH, ES, PT)
• Azure cloud migration (server-side micro-frontends, Kafka, Cosmos DB)
Stack: JavaScript ES6+, Web Components, SCSS, ASP.NET/Razor, Azure, Webpack, Datadog.
Available from July 2026. Open to freelance fullstack JS, Node.js, Next.js, or Python roles.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Paris (up to 20km)
Experience
- Fnac DartySenior Front-End DeveloperOctober 2021 - June 2026 (4 years and 8 months)Ivry-sur-Seine, FranceLong-term freelance mission (5 years) on fnac.com — a leading e-commerce site in France.Scope: Most visited pages of the site (product page, homepage, search results — ~100,000 views/day).On-prem ASP.NET/Razor + JavaScript ES6+ / Web Components stack, migration to Azure cloud (server-side micro-frontends).Key contributions:→ Internal Web Components NPM LibraryCreation and maintenance of a library of 20-30 UI components in native Custom Elements, used by 3 front-end teams. Shared packages: SCSS design tokens, ESLint/Babel configurations.→ Cloud Migration (M2C)Migration of Home / Sub-homes layers to the server-side MFE framework (Kafka, Cosmos DB). Migration from Less to SCSS, Liquid to CSHTML.→ SMILE Redesign (Internal CMS)Figma mockups + complete technical redesign. Deployed for ~50 editors across 8 markets (FR, BE, CH, ES, PT, Fnac Pro).→ Advertising and Marketplace Integrations7 advertising formats (Kamino) + seller information on all surfaces (Arrow).Other projects: DSA, WebPerf, SEO, accessibility (WCAG/RGAA), product page redesign.
- 42 LisboaSystem Engineer & Educational SupervisorSeptember 2020 - July 2021 (10 months)Lisbonne, PortugalRecruited as an alumnus for the opening of the 42 campus in Lisbon.• Setup of the school infrastructure: VMware, Ansible, LDAP on iMacs (exams, correction tools, student sessions)• Service maintenance and incident resolution• Pedagogical role during bootcamps: code review of C projects (48h rushes)• Development of a Next.js e-commerce site: product catalog, OAuth via the official 42 API, order managementWork environment entirely in English.
- X-FABC Developer — Industrial SystemsMarch 2020 - September 2020 (6 months)Development in C of a communication program with industrial machines via the SECS/GEM protocol (semiconductor industry standard).The program allowed triggering actions on machines and retrieving real-time production data.Stack: C, SECS/GEM.
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Digital Technology Architect42201842 est une école basé sur le peer-to-peer learning un fonctionnement participatif qui permet de libérer sa créativité grâce à l’apprentissage par projets. Cet environnement particulier m'a permis d'acquérir une grande autonomie et une capacité d'adaptation à tout environnement technique.