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Sylvain ChatelotSC

Sylvain Chatelot

Product Designer | User research | UX | Front End

€550/day
23 projects
Paris, FR
15+ years
Product Design
User Research
UI/UX Design
Product Discovery
User Experience Design

Average response time: 1 hour

Freelancer profile translated to English.
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About Sylvain

Product Designer, I reduce friction, I optimize your user conversion, while guaranteeing technical feasibility.🚀

Why collaborate with a hybrid Product Designer & Front-End profile (over 20 years)?
The gap between Figma mockups and code (React, Vue, Angular...) is often the main source of delays and errors. I eliminate this friction by mastering the entire product lifecycle, ensuring interfaces that are not only aesthetic but also technically robust and production-ready.

My pillars of intervention:

**Product Design & Discovery**: User Research, UX Design, interactive prototyping, and user testing.



**Design System Architecture**: Application of Atomic Design (Brad Frost) to create reusable components, structured as a true ecosystem for Figma, Storybook, and AI-compatible tokens.



**Engineering & Delivery**: My Front-End expertise allows me to validate the technical viability of each interaction from the design phase. I can collaborate and contribute to delivery for the production team. I can create test prototypes that are as close to reality as possible.



**The technological advantage**: I integrate Agentic AI Workflow (Claude Code, Kilo Code, Hermes Agents) to accelerate the research and development phase, offering you unprecedented execution speed without compromising on quality.


Want to know a little more about me? I invite you to check out my portfolio: sylvain-chatelot.fr

I take on missions of 3 months minimum
Software Publishing
Consulting and Audits
Digital and IT Services
Health and Wellness
Digital Business Models

  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Paris (up to 20km), Le Creusot (up to 50km), Lyon (up to 50km)

Experience

  • Daxium
    Lead Software Front End
    SOFTWARE PUBLISHING
    August 2019 - December 2024 (5 years and 4 months)
    Nantes, France
    - Developed and maintained the front-end of Daxium-Air for 5 years, within a team of 2 developers.
    - Implemented a Webpack architecture and Service Workers to improve loading performance.
    - Supported UX/UI design and validated mockups before development.
    - Collaborated with PMs and designers to translate business needs into technical specifications.
    - Continuously delivered new features on an evolving SaaS product.
    Vue.js AngularJS Balsamiq JavaScript CSS3
  • MisterFly
    Lead Front End Developer
    E-COMMERCE
    June 2018 - April 2019 (10 months)
    Paris, France
    Complete redesign of the MisterFly platform back office for travel agents.
    Migration of C# developed pages to a single-page architecture with Vue.js.
    Supervision and training of 2 .NET back-end developers on Front End with Vue.js + Unit Tests (Karma).
    Vue.js SASS Mocha Vuex Karma
  • Idiliz
    Integration and Front End Angular Developer
    E-COMMERCE
    November 2017 - May 2018 (7 months)
    Paris, France
    Redesign of the Idiliz.com platform as a PWA under Angular 5.
    I joined as reinforcements to help the team complete this major project.
    Angular SASS JavaScript
Check out Sylvain's experience

Reviews

5.0

Out of 8 ratings

A

Anne-Sophie

Idiliz

Reviewed on 6/27/2018

Sylvain was of great help for the redesign of the idiliz platform. In addition to working very quickly and efficiently, he knows how to adapt to constraints and last-minute changes that can occur during a project of this magnitude. His experience, as well as his involvement and good humor, were undoubtedly strong assets in the project's completion.
C

Christophe

Bazarchic

Reviewed on 3/28/2018

Sylvain brought a lot of professionalism and understanding during his missions to integrate our new responsive site. Always attentive to the needs of his interlocutors, Sylvain built our pages with rigor and flexibility. Rigor in his HTML and CSS writing. Flexibility in his graphic understanding. I highly recommend Sylvain.

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Education

  • Product Designer
    The Design Crew
    2026
    Le bootcamp de The Design Crew se déroule sur 8 semaines intensives et s'articule autour de trois projets progressifs couvrant l'intégralité du design process : recherche utilisateur, définition de la problématique, idéation, prototypage, tests utilisateurs, UX writing et création d'un design system. À l'issue de la formation, les apprenants maîtrisent les outils clés du métier (notamment Figma), savent mener un projet de A à Z en autonomie, et ont la possibilité de se spécialiser dans un domaine spécifique (UX research, UI design, UX writing, prototypage avancé). La dernière semaine est consacrée à la construction du portfolio et à la préparation aux entretiens, afin d'être immédiatement opérationnel sur le marché.
  • Expert Accessiweb Certificate
    Université Jussieu - formation accessiweb
    2009
    Formation à l'expertise, audit sur l'accessibilité web
Check out Sylvain's education

Skill set

HTML5
CSS3
SASS
Typescript
Bootstrap
GitHub
Opquast
RWD
WebPerf
Atomic Design
Web Architecture
Performance
CSS
Figma
Kilo Code
OpenCode
JavaScript

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