Guillaume Gautier

👋 10+ years building things on the web as a developer — JavaScript is my home turf, with React, Angular, and Vue in my toolkit. 🤖 I work hand-in-hand with agentic AI dev tools (like Claude Code) to ship faster and smarter — more iterations, tighter feedback loops, and more time spent on what actually matters for your project. ✨ Clean, scalable code is my obsession — I write it to fit your needs, not just to get the job done. 🧑‍🏫 I love sharing what I know and leading teams — mentoring, lifting up the people around me, and helping everyone level up together. 🚀 Whatever stage you're at, I've got you — from spinning up something brand new to maintaining what you already have. 🎨 I genuinely love design too, so I'll team up with your crew to bring your project as close to your vision as possible.

💻 Senior frontend developer at Believe (music distribution platform), I worked on the analytics applications used daily by artists and labels for several months. 🤖 Integrating AI into the development workflow: I defined the right use cases and supported the team in adopting them. 🎨 Active contribution to the internal design system: I unified components and practices across legacy applications and their new versions, for a consistent and durable technical foundation. 🏗️ Migration to a monorepo micro-frontend architecture — a structural effort I drove, giving teams the ability to ship faster and fully autonomously. 🤝 Technical referent for the team: rigorous code reviews, quality standards, and training sessions I designed and ran. ✅ A high bar on quality: tests, consistency, documentation — serving a reliable product, working closely with designers and product managers.

💻 Senior frontend engineer at Sunday (restaurant payment platform), I owned a large part of the design system work for several months. 🧹 Consolidating fragmented initiatives: I gathered everything that had been started, refactored what needed it, removed the dead weight, and cleaned up the foundation to rebuild on solid ground. 🎨 Active contribution to the design system: I added new components and worked hand-in-hand with designers for a consistent and durable technical base. 🏗️ Building the white-label app from scratch — a structural effort I drove, owning every key decision from core design to architecture, while maximizing reuse of Sunday's existing codebase. 🤝 Close collaboration with product teams to align technical execution with product goals. 🤖 At the dawn of generative AI: I trained and upskilled junior developers, including onboarding them on emerging AI tooling. ✅ A high bar on quality: mentorship, consistency, and a reliable foundation built to last.

Transversal implication in the creation of technological products. Creation of a mobile application in React Native. Creation of a web application in React. Creation of servers using Node.js and PostgreSQL.

Station F Lead full-stack developer on mobile app and backend Refactor of the application Redesign integration NodeJS/Express backend from scratch Database migration from Firebase to MongoDB

AngularJS & Angular Refonte de l'application AngularJS, en utilisant Algolia. Création d'un backoffice en Angular (4+)