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Clément J.CJ

Clément J.

Web Developer

€300/day
Paris, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Clément

React / Next.js Web Developer — Creating custom websites, redesigns & modern experiences

Web developer specializing in the design of modern, high-performance, and custom interfaces with React.js and Next.js.

I support companies, startups, and freelancers in creating or redesigning their websites: premium landing pages, showcase sites, web platforms, and personalized digital experiences.

My goal: to transform an idea or design into a fast, fluid, and optimized interface, with particular attention to user experience, performance, and visual details.

My expertise:

- React.js / Next.js Development
- Creation of modern and animated landing pages
- Complete redesign of existing sites
- Custom website development
- Advanced animations and interactions (transitions, scroll effects, micro-interactions)
- Responsive interfaces (mobile, tablet, desktop)
- Performance, SEO, and Core Web Vitals optimization
- Integration of Figma / Adobe XD mockups
- API, CMS, and business tool connection

Technical Stack:

Frontend: React, Next.js, TypeScript, JavaScript
UI: Tailwind CSS, Modern CSS, Reusable components
Animation: Framer Motion, GSAP
Tools: Git, Vercel, Figma
Backend / Integration: REST API, Headless CMS, Databases depending on the project

My Method:

Understanding needs and business objectives
Proposing an adapted solution
Clean and maintainable development
Performance optimization
Deployment and support

Each project is designed to be fast, elegant, scalable, and aligned with your brand image.

Portfolio:
  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • Klark.app
    Web Developer
    February 2026 - June 2026 (4 months)
    Internship — Web & UX/UI Designer Developer at Klark

    During my internship at Klark, I participated in the design and development of modern web experiences by combining interface design (UX/UI) and frontend development.

    I contributed to the creation and improvement of custom digital solutions, working on the design of intuitive interfaces, the integration of mockups, and the development of high-performance web features.

    Tasks performed:

    🎨 Design and improvement of user interfaces (UX/UI)
    💻 Development of modern and responsive web pages
    🧩 Integration of designs and reusable components
    ✨ Creation of interactive experiences with animations and micro-interactions
    ⚡ Optimization of ergonomics and performance
    🔍 Participation in product thinking and user journey improvement

    This experience allowed me to strengthen my skills in frontend development, user experience design, and the creation of web products tailored to user needs.
    SEO React.js NestJs Mobile first Web Development
  • ESEKAI AGENCY
    Web Developer
    SOCIAL NETWORKS
    June 2025 - September 2025 (3 months)
    Paris, France
    I am a UX/UI Designer & Web Developer, specializing in creating Figma mockups and integrating them on Wix Studio & Webflow. I assist my clients from idea to online site: UX design, modern and clean UI design, then responsive development with best practices (mobile-first, accessibility, basic SEO). My goal: to deliver high-performing, aesthetic, and easy-to-administer websites that improve user experience and support your business objectives.

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Education

  • 2nd year of BUT in Computer Science
    UPEC Paris-Est Créteil University
    2025
    2ème année BUT Informatique
  • General Baccalaureate
    Léonard De Vinci High School
    2022
    Baccalauréat général

Skill set

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