SGFreelancer profile translated to English.
Back to original languageAbout Sylvain
Freelance Front-end Developer on React, I support startups, SMEs, and agencies in creating modern, high-performance, conversion-oriented web applications.
With over 20 years of experience in graphic design and UI/UX, I combine technical expertise with a design sensibility to deliver aesthetic, intuitive, and robust interfaces.
I specialize in:
- Development of modern React applications (React, Vite, Zustand, Redux)
- UI/UX design and advanced integration (Tailwind CSS v4, Radix, shadcn/ui)
- API & backend integration (REST, Stripe, Prisma)
- Setup of automated tests (Playwright, Vitest) and CI/CD
- Performance optimization and technical SEO
Recent achievements
- Whoswines.com Marketplace
Complete front-end development with React + TailwindCSS
Creation of modular UI components (Radix, shadcn/ui)
Integration of product APIs and data validation
Setup of secure online payment via Stripe
👉 Result: an operational marketplace enabling winemakers to sell directly online
Olombelona Management Application
Full-stack development in React TypeScript + Prisma
Robust database architecture
Automated tests (Playwright) + CI/CD via GitHub Actions
👉 Result: a reliable and scalable application to manage the company's daily operations
French
Native or bilingual
English
Conversational
Can work on-site
Strasbourg (up to 50km), Paris (up to 20km), Lyon (up to 20km)
Experience
- Le-labFREELANCE FRONT-END DEVELOPERWINE AND SPIRITSOctober 2024 - July 2025 (9 months)Strasbourg, FranceDevelopment of a marketplace application with React- Use of Radix and shadcn/ui for creating modular and reusable UI components- Data validation and form management with Zod- Integration and management of the interconnection with the APIfor fluid communication between the front-end and the back-end
- OlombelonaFull Stack DeveloperSOFTWARE PUBLISHINGAugust 2024 - June 2025 (10 months)Dublin, IrelandDevelopment of web applications using the Epic Stack, including: TypeScript, Remix (for backend), Prisma, Tailwind CSS, React. ------- Collaboration with the CTO to implement new features, improving application performance.- Use of Git and GitHub for source code management and team collaboration.- Development in English.- Setup of automated tests with Playwright to ensure code quality.- Use of Continuous Deployment (CD) with GitHub Actions for continuous updates.- Database management with MySQL to ensure data robustness and scalability.
- Les 1001 clicksReact.js Front-End DeveloperRESTAURANTS AND FOOD SERVICEApril 2024 - July 2024 (3 months)Paris, FranceRedesign of a Just Eat style e-commerce website with 2 developers. Missions:- Front End Development (React.js | Tailwind | NextUI).- Google Places Integration- Scrum Methodology- Definition of specifications- Team Management- GitHub Versioning- Refactoring
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Education
- Professional License in Object-Oriented Application DeveloperUniversity of Haute-Alsace2024Licence professionnelle Développeur d'applications orientées objet
- SERFA - RAN digital professions, developmentUniversity of Haute-Alsace2023SERFA - RAN métiers du numériques, développement