Freelancer profile translated to English.

Description

Senior Front-end Developer specializing in React & Next.js, I work on products requiring redesign, migration, or technical maturity enhancement. For over 13 years, I've been helping teams make their front-end faster, more stable, and better structured.

My approach: clarify architecture, reduce technical debt, and build performant, coherent, and sustainable interfaces. Accustomed to demanding environments, I know how to structure, mentor, and deliver reliable solutions aligned with the product vision.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 20km)

Tinubu Square
Senior Front-end Developer
DIGITAL AND IT
August 2025 - Today (10 months)
Paris, France
Context:
Complete modernization of a B2B SaaS platform with strong challenges in performance, architecture, and UI/UX standardization.

🧠What I implemented:
Creation from scratch of a complete Design System (Shadcn UI, Tailwind CSS, TypeScript, Storybook) to standardize the product experience and accelerate delivery.
Leadership of the migration of a legacy application to Next.js, defining the architecture, conventions, and code splitting strategy.
Advanced performance optimization (Core Web Vitals): dynamic code splitting, lazy loading, caching strategies, and optimized images.
Architecture for complex dynamic forms based on JSONForm (JSON Schema / UI-Schema): multi-step management, business logic conditions, and typed validation.
Design of a highly configurable and multilingual interface (i18n), adapted to different markets and devices.
Implementation of a solid software quality strategy: unit and integration tests (Vitest), end-to-end tests (Playwright), integrated CI/CD.

🛠️ Stack & tools:
TypeScript • React • Next.js • TailwindCSS • Shadcn/UI • JSONForm • Storybook • Vitest • Playwright • Git • CI/CD

🧩 Impact:
Significant reduction in loading time and maintenance costs.
Front-end foundation now stable, scalable, and ready for product evolution.
Adoption of the design system by all teams, creating a common visual and technical foundation.
Next.js Shadcn Typescript React.js TailwindCSS
OnlyDust
Senior Front-end Developer
TECH
October 2023 - May 2025 (1 year and 7 months)
Paris, France
Context:
Complete redesign of a legacy application for a high-visibility tech platform, with long-term challenges in performance, scalability, and user experience.

🧠What I implemented:
Complete migration to Next.js (App Router) with SSR/SSG, optimizing SEO, rendering time, and overall performance.
Implementation of a modular architecture inspired by Clean Architecture, enhancing front-end maintainability, testability, and scalability.
Implementation of a robust, TypeScript-typed design system, documented in Storybook, ensuring UI/UX consistency across the entire product ecosystem.
Auth0 integration for secure authentication, with advanced session, role, and permission management.
Seamless connection with third-party APIs (GitHub OAuth, React Query) for identity management and real-time data.
Codebase rationalization: strict linting, commit conventions, automated CI, systematic unit tests.
Performance optimization: code splitting, lazy loading, selective memoization, and continuous work on accessibility and UX responsiveness.
Data-driven instrumentation with PostHog: tracking user journeys, funnels, and in-app behaviors to guide product priorities.
Advanced monitoring via Datadog: custom dashboards, real-time alerting, and tracking of critical metrics (API latency, frontend errors).

🛠️ Stack & tools:
TypeScript • React • Next.js (App Router) • TailwindCSS • Auth0 • React Query • Storybook • PostHog • Datadog • Vitest • GitHub Actions • CI/CD

🚀 Impact:
+45% improvement in Core Web Vitals (LCP, FID, CLS).
Significant reduction in technical debt and average delivery time.
Adoption of the design system by all front-end and design teams.
More stable, measurable product aligned with the company's data-driven strategy.
Next.js Typescript React.js TailwindCSS
Société Générale - BDDF
Lead Frontend Developer / API Architect
BANKING AND INSURANCE
October 2018 - May 2023 (4 years and 6 months)
Paris, France
Context:
Strategic mission focused on IT system modernization, front-end standardization, and API governance at the group level.

🏗️ SG-APIM – API Management Platform
Migration from IBM-APIM to a custom solution aligned with SG standards.
Development of multi-brand front-end portals (React / TypeScript).
Migration of thousands of APIs to new gateways and continuous product enhancement.

🎨 AWT – Unified Foundation & Design System
Creation of a unified React design system and a shared development foundation across entities.
Promotion of code sharing and internal contribution (tooling, Storybook documentation).

💻 URTA – Mainframe System Modernization
Redesign of 20+ legacy applications into React micro-frontends + Java APIs.
Design of front-end/back-end architectures and mentoring of a team of 6-8 developers.

🤝 SG Partners – TPP Integration Portal (DSP2)
Replacement of Konsentus/Preta with a custom tool for TPP integration.
Creation of the internal SG repository and associated APIs.

🛠️ Stack:
TypeScript • React • Node.js • Java • Redux • REST / GraphQL • API Gateway • Docker • Jenkins • Storybook • GitLab CI/CD

🚀 Impact:
Successful migration of an ecosystem of +2,000 APIs.
Standardization of the front-end through a common React foundation.
Major reduction in technical debt and improved UX consistency.
Accelerated delivery and widespread adoption of new internal tools.
React.js JavaScript (ES6+) styled-components OAuth2 AWS