Freelancer profile translated to English.
Back to original languageAbout Gaetan
Next.js Developer | React.js ⚡
Looking for aNext.js/React.jsdeveloper capable of taking over an existing project or launching a new high-performance and scalable web application?
I am afrontend web developerspecializing inReact.js**, **Next.js**, and **Typescript**, with 8 years of experience in modern JavaScript and web application / **SaaSdevelopment.
I assist my clients in taking over a codebase as well as in the complete creation of an application, fromMVPto **SaaS platform in production**.
I have worked on various projects: redesign of complex applications, product launches for startups, development ofSaaSplatforms, integration offintechsolutions, or evenweb3applications.
I also master theNode.jsecosystem, application state withRedux**, and modern APIs with **GraphQLand **REST API**.
My goal is to deliver a turnkey **frontend**, with clear and maintainable code. Each project is designed to be stable and easy for your teams to evolve over time.
My Tools and Methodology
I develop withReact.js**, **Next.js**, **Typescript**, and **Tailwindto create high-performance and scalable applications.
I applyclean codeandclean architectureprinciples in an agile approach to ensure clear and durable code.
For setting updesign systems**, I rely on **TailwindCSS**, **Shadcn**, **Mantine**, or **Material UI**, and I use **StorybookandChromaticto document components and prevent regressions.
Need a Senior React Developer Quickly?
💬Contact meto discuss your needs for yourweb projectvia video call.
I respond inunder 1 hourand am **available within 48 hours**.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Marseille (up to 50km), Bordeaux (up to 50km), Lille (up to 50km), Lyon (up to 50km)
Experience
- ChainstreamWeb Developer | React.js | Typescript | SaaSPRIVATE EQUITYJanuary 2025 - July 2025 (6 months)Paris, France→ Mission Objective:Design and develop a fintech platform for selling assets in a secondary market.→ Achievements:- Development with React/TypeScript from Figma mockups for order management (buy, sell, cancel, real-time tracking) and the investment dashboard→ Interfaces faithful to the design, smooth order management, and increased transparency for users.- Implementation of a complete onboarding with email, phone, KYC, and financial information validation.→ Compliant with regulations (KYC/AML) and increased user trust.- Adoption of a Clean Architecture (modular) with Redux to structure use cases and event management.→ Maintainable, scalable code and clear separation of responsibilities to accelerate future developments.→ Technical Context:- **Role**: Lead Front Developer | React Developer-Frontend Stack**: React (React.js), TypeScript, Redux, Tailwind **,Shadcn, React Router, React Hooks, Vite, JavaScript (ES6 +), REST API- **Tests**: Vitest, React Testing Library- **Methodology**: Clean Architecture
- Eco-CounterNext.js Developer | React.js | Typescript | SaaSENVIRONMENTALJuly 2023 - May 2024 (10 months)Lannion, France→ Mission Objective:Develop a high-performance public platform to showcase pedestrian and cyclist counting data.Strengthen the internal team by bringing expertise in React and Next.js to develop the internal dashboard.→ Achievements:- Frontend design in React/Typescript with Material UI (MUI), integration of Figma mockups, and creation of reusable components documented in Storybook→ Consistent design, scalable interface, and increased team productivity.- Migration from Create React App to Vite and optimization of the testing pipeline (memory leak fix,execution time divided by 3)→ More reliable pipeline, reduced development time, accelerated deployments, and faster production releases- Development from scratch of public pages in Next.js with Leaflet and Highcharts, optimized by Next.js caching→ More accessible data, improved SEO, and increased organic traffic for local authorities.→ Technical Context:- **Role**: Web Developer | Frontend Developer | React / Next Expertise- **Frontend Stack**: React (React.js), Next (Next.js), TypeScript (TS), Redux, Material UI, React Router, React Hooks, JavaScript (ES6 +), REST API- **Tests**: Jest, React Testing Library, Cypress- **Tools**: Rollup, Webpack
- SynapsNext.js Developer | React.js | TypescriptTECHFebruary 2022 - February 2023 (1 year and 1 month)→ Mission Objective:Develop a decentralized application (Dapp Anima) allowing users to share only the necessary information for their identity, while facilitating client compliance.→ Achievements:- Promotion to Front-End Lead Developer and creation of a Design System with Mantine→ Better collaboration with the design team, visual consistency, and productivity gains.- Development from scratch of Anima with Next.js, React, Typescript, and Ethers.js→ Over 23K users securely and smoothly managing their decentralized identities.- Implementation of a CI/CD pipeline with GitHub Actions and visual regression tests via Chromatic→ Robust code, rapid validation of graphical changes, and a more reliable product.→ Technical Context:- Role:Web Developer | Frontend Developer | Lead React Developer- Frontend Stack**:** React (React.js), Next (Next.js), TypeScript (TS), Mantine, TailwindRedux, React Router, React Hooks, JavaScript (ES6+), Ethers.js, REST API- Tests:Jest, React Testing Library, Chromatic- Tools:GitHub Actions
Reviews
Vincent
Eco-Counter
Reviewed on 9/1/2023
Gaëtan is an excellent developer with strong expertise in the React stack. He grasped the project very quickly thanks to good communication and listening skills with the rest of the team. Gaëtan is also proactive and offers good advice on choices and directions to take on the frontend.
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Education
- Computer Web Designer (Master's degree equivalent)f2i - Paris2017
Certifications
- Clean Architecture | TDDWealcome2024