GRONDIN STEPHANE

Senior Product Designer | UX & UI Specialist

Salaire / Taux journalier

Lille, France

Freelance, ouvert au CDI

Expertises

Design ThinkingUX Product DesignUser Research

Langues

AnglaisFrançaisPolonais

À propos

Introduction

Product Designer with 5+ years accelerating go-to-market strategies for apps and e-commerce platforms. Proven track record launching products in 30 days with +30% productivity gains at major brands like Kiabi and Carrefour. Expert in UX research, design systems, and rapid prototyping to transform business challenges into user-centered solutions.

Liens

Expérience de travail

Product builder

Osteoapp.careFreelance

août 2025 - Présent

1 an 3 mois

Lille, France

Lead product et ux

comuxia.coFreelance

juin 2025 - août 2025

3 mois

Lille, France

Votre agence design par abonnement. Meilleur qu'un freelance et moins cher qu'un designer en interne

Lead product et ux

Produxia.coFreelance

juin 2025 - août 2025

3 mois

Lille, France

Votre agence UX et produit pour un simple forfait mensuel

Founder/ Designer UX UI / Product Designer (Non-profit charity)

Test and HelpFreelance

déc. 2023 - août 2025

1 an 9 mois

Lille, France

UX/UI/Product Designer and Founder of TestandHelp.org (occupation in my free time) 🔍 Context / Problems / Solutions: Throughout my professional experiences, I have been faced with a major challenge: the complexity of targeting the right customers or users for my products, services or applications. It is imperative that a product, service or application is aimed at a specific audience to ensure its proper functioning and guarantee an experience adapted to its users. Indeed, the success of a product depends on its ability to meet the needs of the target market. Convinced of the crucial importance of this approach, I made the decision to create testandhelp.org. This platform not only solves this problem effectively, but also gives it a social and humanitarian dimension. 🎯 Mission of TestandHelp.org Helping NGOs and Associations through Application Testing Creation of the TestandHelp.org platform to connect UX designers/Product Designers with target users, while supporting humanitarian causes. 🛠️ UX/UI design/Product design Solving Business Challenges Identification of businesses’ obstacles to reaching their target audience. Provision of appropriate and effective solutions. 🌍 Social Impact Support for NGOs via TestandHelp.org The testers donate their remuneration to NGOs and humanitarian associations. 🚀 Development of the TestandHelp.org MVP Phase 1 - 🖥️ Creation of a Landing Page for recruiting testers. Phase 2 - 💡 Development of a platform to connect UX designers and testers. Phase 3 - 🤝 Improvement of the platform to integrate companies and testers. 💼 Key Skills 📈 Product Development 👁️ User Experience Testing 🎨 Design Thinking 📊 Data Analysis 🧩 Sort by Cards ✍️ Design of Experiences 🎨Product Designer 🖌️UX/UI Designer

Product designer / UX designer

KIABI

mars 2023 - juil. 2023

5 mois

Lille, France

Description 🔎 UX & CX research: Product Design and Customer Experience Improvement (CX) Design of innovative products to improve the customer experience on kiabi.com. In-depth UX research across Kiabi stores, including customer interviews to understand their needs, preferences and most importantly irritants. 🚀 Customer Experience (CX) Optimization: Conducted an in-depth audit of the kiabi.com application to identify weak points and opportunities for improvement. Using advanced analytics (Content Square) to make informed decisions. 😃 Customer Engagement: Significantly improved the review submission system on kiabi.com to encourage interaction, customer feedback and increase the purchase percentage after reading and submitting reviews. Organization of ideation and prioritization workshops to stimulate creativity and innovation within the team. ⚙️ Organization and optimization of design tools, “UI design” interface design: Successful migration of the component library from Adobe XD to Figma for better collaboration between teams. Organization and implementation of the kiabi.com design system on Figma using the Atomic Design approach, with harmonization of components for visual consistency, improvement of the maintainability of the design system, and facilitated the work of Front developers. 🛠️ Quality Assurance and Mockup Control: Rigorous supervision of mockup development to ensure they meet design standards and user expectations. 🧪 User Testing and Continuous Optimization: Planning and execution of AB tests to validate improvements to the user experience. Using proven methodologies such as OKR, Agile and Design Thinking to ensure our improvement efforts are effective.

UX Designer

IKOMOBI

sept. 2022 - déc. 2022

4 mois

59700 Marcq-en-Barœul, France

Contexte : J'ai pris en charge le renforcement de l'équipe design en remplaçant une UX designer. Pendant cette transition, j'ai hérité des projets de ma collègue et collaboré avec des clients renommés tels que Cora.be, Auchan Go. J'ai également participé activement à des appels d'offres et aux phases d'avant-vente. Auchan Go, j'ai conçu l'application pour les futurs magasins Auchan Go, équivalents français d'AmazonGo, lors d'une phase d'avant-vente. Chez Cora.be, j'ai apporté ma contribution à la conception du service "Clic and Collect" de leur application. Pour Athom power, j'ai élaboré les wireframes de la plateforme de location de batteries écologiques pour le matériel de tournage, cinéma et séries. L'objectif était de simplifier la recherche et la réservation de batteries adaptées en termes de puissance, et la livraison sur le lieu de tournage. Dans le cadre de mon travail sur l'application Metzger, mon objectif principal était de permettre aux clients professionnels de passer leurs commandes de viande directement via l'application et accélérer le processus de commande et à améliorer la gestion globale des commandes, le tout dans le cadre d'une phase d'avant-vente. Enfin, pour le compte d'ikomobi en interne, j'ai participé à la conception de l'interface utilisateur de la Digital Experience Platform (DXP), un CMS avancé permettant aux clients de gérer divers aspects de leurs sites internet, notamment les modifications, les analyses et les campagnes de communication. Missions UX : • 🕵️ Analyse et interprétation du besoin client • 🔭 Veille et analyse de l’existant • 📈 Benchmark UX, SWOT • 📐 Réalisation de wireframes • 📋 Matrice de priorisation (backlog) Missions UI : • ✏️ Conception du design système sous Figma en Atomic design, Sketch vers Figma • 📱 Conception de maquettes (Figma) • 🖼️ Présentation du projet aux clients • 💡 Étude de faisabilité auprès des développeurs Outils : • 🖌️ Sketch • 🎨 Figma • 👀 Invision • 📝 Notion • 📏 Zeplin

UX Designer, Visual & UI designer

Socrate

déc. 2020 - août 2022

1 an 9 mois

Lille, France

- Creation of the experience and interface of the social network socrate. - Co-creation of the user interface, system design in atomic design. - Design thinking approach, user-centered design. - Design sprint google, agile mode, co-design workshop. *Method: design thinking, double diamond, lean UX, design sprint, user centered. *Tools: Adobe XD, figma, maze, notion, trello, miro, kardsort, etc... *Strategy: roadmap, service blueprint, key user research. *Research/empathy: user research, benchmark, swot, primary and secondary research, co-creation workshop, user interview. *Analysis/definition: Design Thinking (personae, user journeys, empathy map...), field observation, data synthesis, prioritisation matrix, mind mapping,... *Ideation: design charrette, co-design workshop, card sorting workshop. *Prototyping: low definition wireframe and high definition model, prototyping, atomic design system. *Testing: UX audit (expert evaluation, heuristic), usability test, user experience evaluation test (SUS, CSUQ, ATTRAKDIFF, meCUE), recommendation and solution. *Optimisation: User data analysis, A/B testing, google HEART framework to implement UX KPIs, UX recommendation after KPI analysis. Translated with www.DeepL.com/Translator (free version)

Project manager I AD I UI UX designer jr

www.3brasseurs.com | www.carrefour.be | www.simplyyoubox.be Freelance

févr. 2019 - oct. 2020

1 an 9 mois

Lille, France

🚀 Freelance Experience - 🎯 Design of Communication Campaigns: Development of captivating communication strategies for various brands. 🌐 Redesign of Website Interfaces - ✨ Significant achievements: Redesign of the sites for “3 Brasseurs”, “Carrefour.fr”, and “Kiko Cosmétique”. - 🔄 Improvement of Purchasing Funnels: Simplification and optimization for a better user experience. 🎨 Design and Innovation - 🖌️ Redesign of icons for Carrefour.be: Creation of modern and functional designs. - 🌟 Contribution to www.simplyyoubox.be/fr/ of the Carrefour Benelux Group: Active participation in the creation of this meal delivery platform for the week.


Formation

Contentsquare

Certification

2023 - Présent

3 ans 5 mois

OpenClassrooms

Master UX DESIGNER (diplôme obtenu)

2022 - 2024

1 an 11 mois

WebForce3

Web and mobile integrator

2018 - 2019

5 mois

MJM Graphic Design

licence communication digitale

2012 - 2014

2 ans 2 mois

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