Freelancer profile translated to English.

Description

Frontend Developer with over12 years of experience**, specializing in **Reactand **Next.js**, I work on web applications with high product and performance stakes.

I have collaborated with major players like Leboncoin, Prisma Media, and Ekino, as well as innovative scale-ups such as Attraqt and Splio.

During these projects, I have notably:

Contributed to high-traffic platforms
Led refactoring and migrations to modern React / Next.js architectures
Structured maintainable and scalable frontend foundations
Implemented quality standards (tests, best practices, code organization)
Collaborated closely with product, backend, and design teams

My approach is based on three pillars: **performance**, clear **architecture**, and sustainable code **quality**, to support long-term product growth.

**Main Stack**:

Frontend & Framework

React · Next.js (SSR / SSG / ISR) · TypeScript · Vite

UI & Design System

Tailwind CSS · shadcn/ui · Storybook · Framer Motion

Data & State Management

React Query · Zustand · Redux

Quality & Performance

Jest · React Testing Library · ESLint/Prettier · CI/CD · Core Web Vitals · Lighthouse

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km), Paris (up to 30km), Lyon (up to 30km), Annecy (up to 50km)

Freelance
Senior Frontend Developer
SOFTWARE PUBLISHING
May 2023 - January 2026 (2 years and 8 months)
Paris, France
Ontex
• Development of an internal order management tool
• Design of a patient mobile application
Stack: Next.js, React Native, Tailwind, Ant Design

Coca-Cola (AKQA)
Development of a gamification platform
• Interactive map of partner restaurants
• Missions and rewards system
• Strong focus on Web Performance & animations
Stack: React, Zustand, Framer Shadcn, React Query, Jest, Playwright

Royal Canin (Ekino)
• Creation of a dynamic form builder
• Migration of the site to micro-frontends
• Contribution to the subscription tunnel
Stack: Next.js, React, Zustand, Shadcn, Webpack module federation

Swile
• Creation of the User / Account space
• Implementation of the Prisma backend
• Integration of CRM Braze
• Authentication via WorkOS
Stack: Next.js, React, Prisma, Braze, WorkOS
Next.js React.js TailwindCSS React Query Shadcn
Early Birds
Senior Frontend Developer
E-COMMERCE
January 2020 - May 2023 (3 years and 5 months)
Paris, France
Lead Front-End at a B2B SaaS editor

Context
SaaS product with strong growth
Need to structure the codebase
Scalability, maintainability, and product quality challenges

Achievements
• Definition and implementation of front-end development standards
• Design of the design system
• Implementation of centralized authentication architecture via Keycloak
• Structuring the front platform (patterns, organization, best practices)
• Implementation of unit tests and quality best practices
• Coaching, mentoring, and skill development of developers

Stack:React, Redux, Next.js, D3.js, Jest, Keycloak
Design System React.js TypeScript d3.js Keycloak
Leboncoin
Frontend Development
DIGITAL AND IT
June 2017 - November 2017 (5 months)
Worked within the Authentication & User Account feature team of the largest classifieds platform in France (30+ million monthly visitors), in the context of migrating the front-end to React.

Context
High-traffic critical paths: registration, login, password recovery, account management
Major challenges in performance, security, reliability, and SEO
Migration from a legacy platform to a modern React architecture

Achievements
• Development of user journeys:
Account creation
Login / logout
Password reset
User profile management
• Active contribution to the front-end migration to React
• Implementation of shared components and quality patterns
• Integration of unit and integration tests (Jest, Enzyme)
• Participation in the internal design system (Storybook)
• Close collaboration with product, backend, and security teams

Stack:React, Redux, Jest, Enzyme, Storybook
React.js Redux.js Jest Storybook

Check out Mehdi's experience

Account deleted

Reviewed on 5/15/2015

Mehdi is a great front-end developer and has been working in a very timely manner. He also always responded promptly to all of our requests. We will keep working with Mehdi and recommend him to others