Freelancer profile translated to English.
Back to original languageAbout Charles-Boris
Front-end Developer - Performant, Accessible, and Sustainable Interfaces
Do you have a Figma mockup, a validated design, or an existing site to evolve, and are you looking for areliable front-end developercapable of transforming these mockups intofaithful, performant, and maintainableinterfaces.
I specialize in integrating mockups and creating front-end interfaces. I primarily work on projects where the stakes are high inintegration quality, performance, accessibility, and technical SEO.
I assist agencies, product teams, and companies with:
- Creation and redesign ofperformant showcase websites(Astro.js),
- Front-end reinforcement on existing projects (Drupal, Symfony/Twig, React),
- Implementation ofsustainable front-end best practices.
I have worked on various projects, from redesigning high-traffic websites to creating modern showcase sites, with particular attention to responsive design,mobile-first**, **accessibility (WCAG)**, and **Core Web Vitals.
My approach is pragmatic:
I deliverclean, documented, and maintainablefront-end code, designed for easy integration with an existing back-end or a headless CMS. I undertake both short-term assignments (integration, partial redesign, performance improvement) and ongoing collaborations with existing teams.
Stack & Practices:
Astro.js, HTML5, CSS3 / SCSS, JavaScript (ES6+), Twig, Drupal, WordPress, React (integration), Bootstrap, Tailwind CSS, Git, REST API, technical SEO, accessibility, web performance.
If you are looking for aresponsive and quality-orientedfront-end developer, contact me to schedule an initial discussion.
I respond quickly (under 2 hours) and can start within a few days depending on project complexity.
French
Native or bilingual
English
Conversational
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Marseille (up to 50km), Lille (up to 50km), Bordeaux (up to 50km)
Experience
- Allibert TrekkingFront-end DeveloperTRAVEL AND TOURISMAugust 2025 - Today (1 year)Annecy, FranceFreelance intervention on a large-scale web project in the adventure travel sector, within a Symfony 7 environment, with significant challenges in integration quality, graphic consistency, and maintainability.
- Integration of Adobe XD mockups provided by a graphic designer, with particular attention to design adherence (pixel perfect)
- Development of front-end pages and components in Twig, integrated into a Symfony 7 ecosystem
- Implementation of responsive and mobile-first development, ensuring a consistent experience across all devices
- Application of accessibility and performance best practices from the integration phase
- Regular collaboration with project managers and back-end developers in an agile framework
- Participation in weekly progress meetings to ensure quality, meet deadlines, and maintain project alignment
Technical Stack:Symfony 7 • Twig • HTML • CSS • JavaScript • Responsive design / Mobile first • Bootstrap 5 - Havas ParisWeb Contributor - Drupal 10DIGITAL AND ITNovember 2025 - November 2025Annecy, FranceFreelance contribution mission on a Drupal 10 site, as part of a major commercial operation, with a very tight deadline and a fixed production launch date.
- Manual duplication of over 100 pages from a pre-production environment to production, via the Drupal back-office
- Verification of content conformity between environments (structure, layout, editorial consistency)
- Strict adherence to project guidelines and production deployment processes
- Work under high time pressure, with an imperative to deliver before the operation launch
- Close collaboration with the project manager to ensure the smooth running of the go-live
Result:Production deployment completed on time, allowing the commercial operation to launch on the scheduled dateTechnical Stack:Drupal 10 • Drupal Back-office • Content Management - l'Ecole des loisirs
On Malt
Front-end DeveloperPUBLISHINGMarch 2025 - October 2025 (7 months)Annecy, FranceTwo-phase freelance collaboration with 'l'école des loisirs', focusing on website redesign and creation projects, with significant challenges in accessibility, performance, technical SEO, and maintainability.Mission 1: Partial Redesign of the Main Website (Drupal 7)- Integration of Figma mockups for the redesign of 8 key pages, as well as the header and footer, with particular attention to design adherence (pixel perfect)
- Responsive and mobile-first development, adhering to web accessibility best practices
- Creation of an information pop-up to direct visitors to a satisfaction survey
- Resolution of front-end bugs and improvement of site stability in production
Mission 2: Creation of the 'Fondation l'école des loisirs' WebsiteA website designed as a solid technical foundation for an institutional project, with strong requirements for performance, accessibility, and maintainability.- Complete creation of a static showcase website with Astro.js, designed mobile-first
- Integration of Figma mockups faithful to the designs, accessible, performant, and sustainable
- Implementation of technical SEO best practices from the integration phase (HTML structure, performance, responsive rendering)
- Development of an application form for a call for projects
- Implementation of a headless CMS (Directus) for content and application management
- Connection of the form to the back-office via API, with automatic creation of entries in Directus
- Ongoing maintenance and evolution: client support after go-live (bug fixes, adjustments, occasional evolutions, updates).
Result:Website achieving excellent Lighthouse scores in performance, accessibility, and SEO.Technical Stack:Drupal 7 • Astro.js • Directus (Headless CMS) • HTML • CSS • JavaScript • REST API • Docker
Reviews
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Education
- Front-end Application Developer, Programming / Computer Developer, GeneralOpenClassrooms2022Développeur d'applications Frontend, Programmation / développeur informatique, général
- Web and Mobile Application Developer, Computer ScienceIT Akademy2020Développeur d'applications Web et Mobile, Informatique