Joël Matelli
Technical Lead at Yaarz
Paris, Ile-de-France
Summary
👤
Senior🎓
Top SchoolJoël Matelli is a Technical Lead and senior frontend engineer based in Paris with 13 years of experience building polished, accessible web interfaces using TypeScript, React, React Native and modern CSS. He specializes in conceiving and evolving design systems—having led migrations to tokenized systems, documented components in Storybook, and kept libraries aligned with designer patterns at organizations like BNP Paribas and SNCF. Comfortable across the stack, he has paired frontend work with backend touches in Go and driven architecture shifts (HOC → hooks, JS → TS) to improve maintainability and testability. Joël is passionate about accessibility and performance, recently focusing on making interactive experiences (e.g., story-style viewers) both visually coherent and inclusive. He prefers freelance engagements over permanent roles, bringing a pragmatic blend of technical leadership and hands-on delivery to client missions. An engineer who values craft, he often starts components in Storybook to iterate design and behavior before full integration.
13 years of coding experience
13 years of employment as a software developer
BSc Degree, Web conception and development, BSc Degree, Web conception and development at University of Aix-Marseille II
French, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (37)
parking7
online-game5
css4
meter4
hosting4
automation3
multiplayer-game3
android3
android-app3
cli3
react3
ios3
minecraft3
html-element3
bootstrap3
Programming languages (7)
Github contributions (5)
tellijo/horofree
Oct 2016 - Nov 2016
Contributions:23 commits, 29 PRs, 47 pushes in 7 days
reactfreelancersmeterparking
jmatelli/dotfiles
Jan 2017 - Sep 2025
MacOS dotfiles
Contributions:34 PRs, 40 pushes, 19 branches in 8 years 9 months
karabinermutttmuxlinuxasdf
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.