Freelancer profile translated to English.
Back to original languageAbout Leonardo
🚀 What I do
I design and deploy custom web products, from prototype to production. Websites, web applications, desktop applications: I handle everything, autonomously, always starting from the actual need before the technology.
My principle: the elegance of an application is measured by its usefulness, not its sophistication.
💼 My concrete projects
🌐 Voyagitron: Web SaaS in public beta, dedicated to travel organization. Designed and deployed alone (React, Vite, Supabase, PWA, Vercel). See it online: voyagitron-eznk.vercel.app
💻 YouTube → MP3 Converter: Local desktop application for a person with a mental disability. I learned Rust and Tauri specifically for this project, because reliability mattered more than trendy tech.
🛠️ My technical stack
Front-end: React, Vite, JavaScript, HTML5, CSS3, PWA
Back-end & native: Python, Rust, Tauri
Database: Supabase, PostgreSQL
Tools: Git, GitHub, Vercel, Agile methodology
🎯 Who I work for
I am particularly comfortable with small structures with strong human value: associations, passionate artisans, professionals in care, education, or accessibility. If you have a concrete problem to solve but not a ready-made solution, I'm the one for the job.
🤝 How it works
1. We discuss your actual need (not your surface request)
2. I propose the simplest solution that truly solves it
3. I deliver autonomously, in validated steps, without surprises
4. You get a working product, ready to use
📩 Let's discuss: contact me directly via Malt to talk about your project. First discussion is free and without obligation.
English
Fluent
Spanish
Native or bilingual
French
Native or bilingual
Portuguese
Native or bilingual
Remote only
Primarily works remotely
Experience
- Leonardo freelanceYouTube → MP3 Converter: Desktop application for accessibilityHEALTH AND WELLNESSMay 2026 - May 2026Dax, FranceShort version:Local desktop application designed to allow a person with a mental disability to convert YouTube videos to MP3 files autonomously. 100% local, no cloud, with a simplified interface.Long version:🎯 The projectThis application was designed to meet a specific need: to allow a person with a mental disability to use a video→audio conversion tool autonomously, without relying on an internet connection or cloud service.The challenge was not technical but human: absolute ease of use, reliability, security. The technical choices followed from this.🛠️ My responsibilities100% of the project, autonomously:- Needs-oriented design (icon-based interface, minimal user journey)- Architectural choice: 100% local, no server or database- Learning Rust and Tauri specifically for this project- Integration of yt-dlp and ffmpeg as native sidecars- Implementation of security through least privilege⚙️ Technical stackInterface: React + Vite, Lucide (icons).Native core: Rust + Tauri (lightweight desktop application).Embedded engines: yt-dlp (download) and ffmpeg (conversion), integrated as sidecars.💡 ApproachI prioritized:- MP3 format for its universal compatibility (car radios, old devices) over a more modern but less compatible format- Tauri over Electron for memory efficiency- Complete absence of database and server when nothing justified themDevelopment followed an incremental logic: each feature validated in isolation, application always functional.
- Leonardo freelanceVoyagitron, web SaaS for managing tours and cultural quizzesCULTUREMarch 2026 - Today (3 months)Dax, FranceShort version:Allows users to organize their tourist itineraries on Google Maps and test their cultural knowledge.Long version:🎯 The projectVoyagitron is a web SaaS application that I designed and deployed alone, from prototype to production. The objective: to bring together in a single tool what users search for scattered across multiple sites when preparing for a trip: itinerary organization, map visualization, cultural preparation.The application is currently in public beta and can be installed as a native mobile app (PWA).🛠️ My responsibilities100% of the project, autonomously:- Product design and technical architecture- Front-end development and Google Maps integration- Setting up authentication and database (Supabase)- PWA configuration for mobile installation and offline mode- Production deployment on Vercel- API key security and Git workflow⚙️ Technical stackReact, Vite, Supabase (PostgreSQL + Auth), Google Maps API, Open Trivia DB, Workbox (PWA), Vercel deployment.📈 StatusTested by a restricted network of users before a wider launch. V2 roadmap in progress: integration of booking APIs (Skyscanner, Booking.com).🔗 Live application: voyagitron-eznk.vercel.app🔗 Source code: github.com/Rekr-Online/Voyagitron
- Projet PersonnelPortfolio website for a photographerINTERNET OF THINGS (IOT)January 2025 - March 2025 (2 months)France• Structure and Semantics: Development of a multi-page website (Home, About, Portfolio) using a semantic HTML5 structure, promoting accessibility and natural referencing (SEO).• Modern Layout: Mastery of layout techniques with Flexbox for component alignment and CSS Grid for creating complex and structured image galleries.• Responsive Design: Design of a fully responsive interface using Media Queries, ensuring an optimal user experience on mobile, tablet, and desktop.• Styling and Interactivity: Advanced styling in CSS3, including the use of custom fonts (Google Fonts), gradients, and the creation of interactive effects (hover states, transitions) to enhance user engagement.
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Education
- web devOpenclassroom2026Développeur Web OpenClassrooms | Diplôme de niveau 5 (bac +2) | Formation en alternance à venir Les objectifs de la formation : Développer un site web responsive et interactif Créer des API et bases de données pour un site dynamique Optimiser le référencement et les performances web Gérer un projet web de la conception à la livraison Les outils et les méthodologies : HTML et CSS Git / GitHub JS React API Responsive design SEO