Freelancer profile translated to English.
Back to original languageAbout Leo
Passionate about web development and creating fluid user experiences, I have been working as a React developer for 3 years on the design, improvement, and optimization of high-impact sites and applications.
Result-oriented, I offer modern solutions adapted to your objectives (code / no-code) and place the user experience at the center of my approach.
💼 Types of web projects
- Web applications in react.js | next.js / backoffice / administration interface
- Showcase sites / blog / web tools / projects with high SEO stakes
💻 Main skills
- **Programming**: React.js (Next.js/Vite) | TypeScript | JavaScript (ES6+) | HTML5 | CSS3 | Node.js | Express | TailwindCSS | SASS
- **UI/UX & Design**: UX/UI Design | Figma
- **Architecture & Data**: REST API | GraphQL | Headless CMS | Wordpress | MySQL | AWS | Google Cloud Platform/Firebase | CI/CD | Git & GitFlow | Code/No-code
- **Optimization & Quality**: Technical SEO | Unit & E2E Tests | Web Performance (Core Web Vitals) | Accessibility
🎯 My services
- Needs analysis / advice and technical choices / development of specifications
- Creation of websites and web applications from A to Z
- Optimization (UX, SEO, loading time) / debugging / adding features
- Website redesign / migration
- Maintenance
🔄 Methodology
I am used to working both within technical teams (agile method) and with digital / marketing professionals.
📈 Why trust me?
- "User first" approach
- Rigorous testing
- Involvement and adaptability
Contact me now!
English
Native or bilingual
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- Retail VRFull-Stack DeveloperMay 2025 - June 2025 (1 month)Paris, FranceComplete creation of a web application for taking photos and product references for 3D modeling.Main features: taking and retouching photos, barcode scanning, adding metadata, exports, backoffice area.
- Coop PortageFront-End DeveloperHUMAN RESOURCESFebruary 2025 - March 2025 (1 month)Paris, FranceDesign and creation of a revenue simulator adapted to the needs of wage portage.The objective was to simplify (and clarify) the process of converting turnover into salary(s), and vice versa, while taking into account elements relating to regulations on wage portage and the personal situation of the ported employees.Target audience: internal team, ported employees, prospects.
- decodage-fiscal.fr | Premier simulateur complet pour freelancesFull-Stack DeveloperSOFTWARE PUBLISHINGAugust 2023 - August 2024 (1 year)Paris, FranceAt the initiative of the first complete simulator for freelancers, accessible on **decodage-fiscal.fr**.Well known to the freelance community, this application allows freelancers to make the right choices in terms of legal status, tax options and remuneration, all in a few clicks and without prior mastery of the subjects.
Reviews
Erwan
Retail VR
Reviewed on 7/16/2025
We needed to develop an application outside of our product roadmap, initially imagined and prototyped on the Lovable AI. From this first mock-up, Léo was able to formalize a complete and structured specification, detailing each module and clearly communicating the technical constraints as well as the possible development paths.
The collaboration with our development teams went smoothly and efficiently. The project was delivered on time and perfectly in accordance with the defined specifications. We are fully satisfied with the quality of the work provided, both technically and in terms of support and follow-up.
We will call on Léo again without hesitation for our future developments.
Raphael
Cadeaux Pourris
Reviewed on 2/6/2025
I used Léo's services as part of a project around personal finance. He quickly understood our challenges and proposed a clear, structured and well-argued action plan for the launch of our site.
His expertise was invaluable, and I recommend him without hesitation.
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Education
- Full-Stack EngineerCodecademy2022Compétences acquises : Capacité à développer et déployer des applications web complètes de A à Z, maîtrise des technologies front-end et back-end modernes, gestion de bases de données, contrôle de version (Git), et fondamentaux en algorithmes et structures de données. Contenu de la formation : - HTML - CSS - Javascript - Deployment - Responsiveness - Git and GitHub - Website accessibility - Testing - Async JavaScript and HTTP Requests - React - Redux - Express.js - User Authentication and Authorization - Databases (Postresql) - API Development with Swagger and OpenAPI - Deployment (Heroku, Netlify, GitHub Pages) - Web and Data Security - Fundamentals of Operating Systems - Fundamentals of DevOps - Linear and complex data structure - Algorithms - Search & Graph Search Algorithms
Certifications
- Full-Stack Engineer | CertificateCodecademy2022