Freelancer profile translated to English.
Back to original languageAbout Jean Seb
Do you have a front-end problem with your web applications? With my experience and availability, I can solve it. Whether it's building a non-existent digital product, fixing and improving an application already in production, or meeting specific audit or consulting needs, don't hesitate to contact me to explain your requirements.
English
Fluent
French
Native or bilingual
Can work on-site
Lille (up to 40km), Paris (up to 10km)
Experience
- DECATHLONFrontend DeveloperJune 2026 - Today (2 months)Lille, FranceEvolution of the OnePay online payment module for Decathlon group websites and apps - freelance missionMember of the OnePay team, which manages online payment modules and pluginsFront-end development in Svelte (TypeScript)Creation of UI interfaces from Figma prototypesAI-assisted development (Copilot)
- ADEOFullstack DeveloperRETAIL (LARGE RETAILERS)August 2025 - February 2026 (6 months)Lille, France
- UI redesign of the in-store DIY equipment rental application (Leroy Merlin). VUE 3 / SPRING
- Automated tests (Vitest / Playwright)
- Contributions to back-end development (JAVA, Spring)
- AI-assisted development (Claud Code / Copilot)
- DecathlonFullstack DeveloperRETAIL (LARGE RETAILERS)August 2021 - February 2025 (3 years and 6 months)In logistics, development of 2 products within a restore team. Technical stack Spring Java / Vue3 (Typescript)
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Education
- Master's Degree in Arts and Culture ProfessionsUniversité Lille32003
- Information Systems Project ManagerOpenClassroomsGestion de Projet SI - bac + 5
Certifications
- MOOQ Project ManagementEcole Centrale Lille2016
- Opquast® Certification: Mastery of quality in web projectsOpquast2020