About Guillaume
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 to ship faster and smarter — more iterations, tighter feedback loops, and more time spent on what actually matters for your project.
I love sharing what I know and leading teams — mentoring, lifting up the people around me, and helping everyone level up together.
Clean, scalable code is my obsession — I write it to fit your needs, not just to get the job done.
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.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Believe SA
On Malt
Senior Frontend Engineer & AI Workflow AdvisorFILM AND AVMarch 2026 - July 2026 (4 months)Paris, FranceSenior 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. - Sunday SASSenior Frontend EngineerAGRICULTUREMarch 2025 - October 2025 (7 months)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.
- FreelanceDeveloppeur full-stackSOFTWARE PUBLISHINGDecember 2016 - Today (9 years and 7 months)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.
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Education
- Bachelor's degree, Développement WebEEMI2017Bachelor's degree, Développement Web
- Baccalauréat, Sciences et technologies de l'industrie et du développement durableNotre Dame de Sion Evry2014Baccalauréat, Sciences et technologies de l'industrie et du développement durable