Freelancer profile translated to English.
Back to original languageAbout Leonardo
A dev who tells you "we don't need to code this" is rarer than a dev who tells you "I can code this." Voyagitron, accessibility converter, showcase websites: I deliver based on real needs, using React / Rust / Supabase.
My flagship projects:
▪️ Voyagitron: Public beta travel SaaS, designed and deployed alone from prototype to production (React, Vite, Supabase, PostgreSQL)
▪️ YouTube Converter: Open source Rust + Tauri desktop application, designed for someone with specific accessibility needs
▪️ HTML5/CSS3 showcase websites for associations and local projects
What I can do for you:
▪️ Custom web applications (React, TypeScript in learning zone)
▪️ Multi-platform desktop applications (Rust, Tauri)
▪️ Databases and backend (Supabase, PostgreSQL, RLS security)
▪️ Showcase websites and PWAs (HTML5, CSS3, Vite, Vercel)
What sets me apart:
I don't code for the sake of coding. Every line of code I deliver exists because it meets an identified need. It's sometimes less spectacular, but it's more reliable, more maintainable, and cheaper in the long run.
My philosophy: code that doesn't exist has no bugs.
Available immediately, full remote only.
Quadrilingual: Native French and Portuguese, Professional English, Spanish B2.
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 independently. 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 independently, without relying on an internet connection or a cloud service. The challenge was not technical but human: absolute simplicity of use, reliability, security. The technical choices followed from this.🛠️ My responsibilities100% of the project, autonomously:- Design oriented towards real needs (icon-based interface, minimal user journey)- Architectural choices: 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:- The MP3 format for its universal compatibility (car radios, old devices) over a more modern but less compatible format- Tauri over Electron for memory efficiency- The complete absence of a database and server when nothing justified itDevelopment followed an incremental logic: each feature validated in isolation, application always functional.
- Leonardo freelanceVoyagitron, web SaaS for tour and cultural quiz managementCULTUREMarch 2026 - Today (5 months)Dax, FranceShort version:Allows users to organize their tourist tours on Google Maps and test their cultural knowledge.Long version:🎯 The projectVoyagitron is a SaaS web application that I designed and deployed alone, from prototype to production. The goal: to bring together in one tool what users search for scattered across multiple sites when preparing for a trip: tour organization, map-based planning, cultural preparation.The application is currently in public beta and can be installed like a native app on mobile (PWA).🛠️ My responsibilities100% of the project, autonomously:- Product design and technical architecture- Front-end development and Google Maps integration- Authentication and database setup (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 photographerCULTUREJanuary 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 developerOpenclassroom2026Développeur 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