Guillaume EXCOFFIER
Lead Front-End Developer | TypeScript
Salary / Daily rate
Lyon, France
Freelance
Can come onsite
Skills
Languages
About me
Intro
Lead Front-end Developer with 4+ years specializing in TypeScript/React and luxury brand projects. Expert in Next.js optimization (SSR/SSG), team leadership, and delivering high-performance applications for premium clients. Ready to elevate your front-end with modern tech stack and proven luxury market expertise.
Work experience
Lead Developpeur Front-end
FreelanceFreelance
Feb 2024 - Present
2 years 9 months
Lyon, France
Initialisation of a front-end project for a luxury client specialized in jewellery and Watch. Active participation in technical décisions of the whole project direction. Responsible for code quality of the front-end team and continuous improvement of the project. Following agile methodology in order to deliver the various functionalities. Tech stack : - Next JS (app router, version 13+) - Docker - React, Typescript - Zustand - React query - i18n - Versionning Git - CMS integration Prismic - Tailwind CSS Optimisation of screens through the use of the various possibilities offered by NextJS/ - Server side rendering (SSR) - Client data fetching - Static site generation at build time (SSG)
Keyrus
Mar 2021 - Mar 2024
3 years 1 month
69100 Villeurbanne, France
Consultant Confirmé / Lead Tech
Nov 2022 - Mar 2024
1 year 5 months
69100 Villeurbanne, France
• Création d'une application responsive react pour un client du secteur du luxe (Typescript, Vite, Redux Toolkit/RTK, I18n, Vitest, PWA, tailwindcss). - Revue de code, Unit testing & CI/CD. • Estimation des sprints et participation active aux réunions agiles. • Supervision de l'équipe de développement et formation des profils juniors • Responsable de l'équipe JavaScript/Typescript
Junior Consultant
Sep 2021 - Dec 2022
1 year 4 months
69100 Villeurbanne, France
- Maintenance of existing application and technical support for users. - Website refactoring/redesigning (creation of a site in React and transition from JAVA to Node). (Typescript/JS) - Active participation in agile project meetings (Daily meeting, sprint planning, sprint retro, ...)
Stagiaire Mobile ou Web
Mar 2021 - Aug 2021
6 months
69100 Villeurbanne, France
Skills: JAVA · React.js · Méthodes agiles
Internship in R&D
Trilogy Technologies
Feb 2020 - Aug 2020
7 months
Singapore
Researched and developed software and hardware solution in order to meet client’s needs. • Programmed in C# for a robotic arm (UR5) • Developed an inventory tracking mobile application for android involving RFID. • Prototyping of a smart temperature watch in response to the COVID outbreak.
Front-End Developer
Junior ISEP
Jul 2019 - Oct 2019
4 months
Paris, France
Development of a mobile application for both Android and IOS in react-native involving authentication, in app payment and back office linking. • React-Native development • Client feedback • Linking to back-end • Publishing the application on the Play Store
Education
Isep - École d'ingénieurs du numérique
Diplôme d'ingénieur
2016 - 2021
5 years 1 month
Inha University
Ingénierie informatique
2020 - 2020
5 months
Wrexham University
Echange avec école partenaire
2018 - 2018
7 months