About
Hi I'm Julien, a French UX Engineer. I have four years of experience in Software Engineering and three years as UI Designer. Currently working as a Senior Front End engineer at Parasanté online, formerly Senior Front End developer at Marmalade GmbH and Product Designer at Nielsen, I create cool interfaces, code websites, and usually drink coffee.
Resumes
WORKS
Full Stack Developer (contract)
ProspektoRemote, December 2025Fully owned and delivered a full-stack Next.js marketing website for Prospekto, an AI-powered document summarisation application, deployed on Vercel.
Redesigned the website, improving UI/UX and overall user experience.
Developed the front end and implemented a Markdown blog.
Full Stack Developer (contract)
Frenchy FoodRemote, October 2025Built a full-stack Next.js website for Frenchy Food, a B2B catering company serving airlines and public institutions.
Owned the project end to end, from UI/UX design to delivery, and deployed on Vercel.
Developed the front end and implemented a custom CMS for products, pages, navigation, etc. management, accessible
only by JWT authentication.
Built the supporting back-end infrastructure with Next.js server components and MongoDB.
Senior Front End Developer
GIE G5 LanguedocRemote, Since January 2025Took full ownership of the project and developed a CMS in React to replace a WordPress solution for the Parasanté Online website, creating a tailored solution and reducing loading times by 15%.
Built accessible UI patterns aligned to WCAG expectations.
Implemented end-to-end and unit tests using Cypress.
Senior Front End Developer
MarmaladeBerlin, February 2024 - July 2024Defined component patterns and state/data strategy for products owned by the agency, working mainly with React and Next.js.
Front end development for several clients of the agency, working mainly with Angular.
Front End Developer
NielsenBerlin, July 2022 - January 2024Front end development in React, Typescript and GraphQL of products owned by the company.
Ensured front-end quality and reliability through automated end-to-end and unit testing with Cypress.
Development of a components library, previously designed when I was Product Designer.
Front End Developer
Venture LeapBerlin, March 2022 - June 2022Front end development for several clients of the agency, working mainly on front end UI on Symfony based web app (Twig/JS/CSS).Product Designer
NielsenWarsaw, January 2020 - September 2021UX/UI Design for different products owned by the company.
Building a global design system used on several products of the company.
Mockups of a PWA helping panelists to manage their account, used in more than 30 countries, and translated in more than 35 languages, including RTL languages.
Design Engineer
wibas etarateHamburg, October 2018 - December 2019UX/UI Design & Front End Development for several clients of the agency.
Mockups of websites managed by the company.
Graphic design of corporate resources.
Scrum Master of the development team.
Stacks
Front end
HTML
CSS
SCSS
Styled Components
Stylus
TailwindCSS
JavaScript
TypeScript
React
Angular
Jekyll
Liquid
Back end
Node.js
Express
Python
Flask
GraphQL
Handlebars
Databases
MongoDB
SQLite
AI
Chat GPT
LLM and Chatbots
Design
Figma
Lunacy
Sketch
Webflow
Adobe Suite
Other
Cypress
Git
Github
Gitlab
Studies
Ironhack
AI Engineering bootcampMay 2025 - July 2025Ironhack
Web Development bootcampOctober 2021 - December 2021Ironhack
UX / UI Design bootcampMarch 2018 - May 2018
Middlesex University
MSc Creative Technology2016 - 2017