UI / UX & Design
10 erreurs UX qui font fuir vos utilisateurs (et comment les éviter)
Navigation confuse, temps de chargement interminables, pop-ups agressifs : découvrez les erreurs UX fatales qui ruinent votre taux de conversion.
Karl Duponchel
Karl Duponchel - UI/UX Designer and Web Developer based in France
Introduction
Hi ! I'm Karl Duponchel, a
UI/UX Designer and web
developer based in
France.
About me
Karl, 24yo based in Rouen, France. Web, technologies and sports lover.
4 years of experience in full-stack web development, e-commerce solutions, and creative design, with a strong focus on structured, efficient, detail-oriented, and impactful digital experiences.
I specialize in building dynamic websites and intuitive interfaces, ensuring both functionality and aesthetic appeal.
WORKS
PersonalERP
This application is my personal ERP, built from scratch with NextJS, Prisma, PostgreDB, and TailwindCSS. It allows me to manage my business and personal data, such as invoices, orders, and payments in order to keep track of my finances.
PadoueAgence
Padoue Agence is a French commercial agency specializing in designing, creating content and making advertising campaigns. The website is built using WordPress and Elementor. I also took care of the website hosting, DNS and SMTP configuration.
View previewBrikxConsulting
BRIKX Consulting supports executives in developing regenerative leadership by combining cognitive performance and life balance. The company offers a method based on neuroscience and nutrition to restore decision-making ability under pressure, through structured programs covering stress management, sleep, digital attention, and positive psychology.
View previewStudioByL
Studio By L is a website representing the work of a nail artist, and the ability to take contact with the artist. The website is built using a custom CMS and a ReactJS framework.
Professional Experiences
Freelance Developer
2025-now
At the same time as my work, I also develop websites and applications for clients.
WordPressNextJSBucket S3SQLTailwindCSSDockerHostingSEOExpo GO
SNT2
2024-now
Web consulting and full stack web development of BtoC and BtoB e-commerce websites. Management of an n8n connector between e-commerce platforms and a ERP.
PrestaShopn8nPHPData EngineeringSQLWordPressHesk
Attineos Applications
2023-2024
Full stack web development and design, re-built the extranet.
ReactJSSymfonyDocker
Sphere Immo
2022-2023
Full stack web development of the BtoC website, using ReactJS and Symfony.
ReactJSSymfony
PC Partners
2021-2022
Front-end web development of the extranet and the BtoC website and mobile apps for clients.
NextJSSQLReact NativeTailwindCSS
Latest articles
Tech & Code
Vibe Coding : quand l'IA transforme le syndrome de l'imposteur en opportunité
Le vibe coding bouleverse notre métier : fini le code ligne par ligne, place à l'orchestration d'IA. Comment cette révolution redéfinit l'identité du développeur.
Karl Duponchel
Tech & Code
PrestaShop vs Shopify, WooCommerce & Magento : quel CMS e-commerce choisir en 2026 ?
Shopify, WooCommerce, Magento ou PrestaShop ? Découvrez les forces et faiblesses de chaque solution e-commerce pour faire le bon choix selon vos besoins.
Karl Duponchel