Hi, I’mLéon
Independent developer and designer in Belfort.
I taught myself to code by copying websites, then did my studies through a work-study program.
Agency work taught me to work as part of a team, but what I enjoy most is talking directly with people. Discussing, understanding the real problem and finding the right answer.
The rest of the time, I keep an eye on new tech, play games and learn new things.
What I do
Front-end
HTML · CSS · SASS · JavaScript · TypeScript · React · Tailwind
Back-end
Express.js
Applications
React Native · Electron · Tauri · Rust
Database
Supabase · MySQL · PostgreSQL · MongoDB
DevOps
Docker
UI-UX
Figma
Tools
Git · Github
CMS / E-commerce
Shopify · Liquid
The journey
2023 - 2025
Web application developer-designer
LiveCampus
The Level 6 RNCP certification for "Application Developer-Designer" covers the entire lifecycle of software solutions, from requirements analysis to deployment. The program emphasizes technical architecture, Full Stack development, and the implementation of Agile methodologies for project management. The curriculum integrates current industry standards, including DevOps culture, application cybersecurity, and eco-design principles.
2023 - 2025
Frontend developer
Lugus - Agence d'experts Shopify
I developed high-performance e-commerce interfaces and advanced theme solutions. My technical scope included engineering bespoke features in Liquid, leveraging Metafields and Metaobjects, and managing end-to-end store configurations. I notably built the frontend for a custom-made translation application using React and Laravel. My responsibilities also extended to conducting technical SEO and performance audits (Core Web Vitals) alongside A/B test implementations to drive conversion rate optimization.
2021 - 2022
Web and mobile web developer
SEM Numerica
The Level 5 RNCP certification in "Web and Mobile Web Development," completed at the SEM Numerica center, provides the fundamental building blocks of programming and digital interface design. The program focuses on developing both static and dynamic web applications, covering front-end and back-end languages as well as relational database management. The curriculum also integrates skills in UI/UX wireframing, mobile ergonomics, and the implementation of security best practices.
2022
Backend developer
Vetoquinol
Developed a PHP script to synchronize remote databases via API and managed server-side deployment.
A projectto scope?
Reply within 48 hours, free quote. We settle the exact scope together.