Freelancer profile translated to English.
Back to original languageAbout Frédéric
Senior Full Stack Developer | Lead Dev | CTO – 15 years of experience
Main technical expertise:
- Front-end: React, React Native, Next.js, TypeScript -> creation of modern, performant, and maintainable interfaces.
- Back-end: Node.js, Adonis.js, Strapi -> robust architectures, scalable APIs, complex integrations.
- Full stack: global vision, from design to production, including CI/CD and performance optimization.
My approach:
- Strong listening skills → in-depth understanding of business needs and challenges.
- Technical leadership → team management, mentoring, and implementation of best practices.
- Product vision → not just code, but concrete solutions that create value.
Whether you need **operational support**, an efficient and autonomous **developer**, a **technical lead**, or a part-time **CTO**, I can intervene quickly, take charge of your projects effectively, and ensure my rapid integration into your structure and team.
My goal: to help you transform your ideas into sustainable and high-performing products.
English
Fluent
French
Native or bilingual
Can work on-site
Lille (up to 50km), Paris (up to 50km), Lyon (up to 50km), Nantes (up to 50km), Toulouse (up to 50km)
Experience
- TotalEnergiesSenior Front-End DeveloperENERGY AND UTILITIESMarch 2026 - Today (5 months)Lille, FranceThe missionI am working as a front-end developer on a large-scale B2B web platform that allows companies to manage their mobility fleet: employee and vehicle management, fuel/electric charging cards, billing, transactions, tolls, consumption tracking, multi-company structures, and reporting.As part of a product team using agile methodology, I design and evolve complex, performant, and accessible interfaces for thousands of professional users in a multi-country and multilingual context.My contributions:
- Development of new business features end-to-end (from mockups to production)
- Integration of a GraphQL API with automated type generation and optimized data fetching (TanStack Query)
- Construction of rich interfaces: large data tables, advanced validated forms, bulk operations
- Implementation and use of a shared design system
- Internationalization (i18n), feature flag management
- Unit and integration tests (Jest + Testing Library), code quality (SonarQube, ESLint), CI/CD and Docker containerization
Technical Stack:Next.js 15 · React 19 · TypeScript · GraphQL · TanStack Query · Zustand · React Hook Form · Zod · Emotion / MUI · i18next · Unleash · Jest · DockerContext:Critical large-scale application, strong requirements for performance, quality, and maintainability. - SweaplyFull Stack Developer React / AdonisJSNovember 2025 - February 2026 (3 months)The projectSweaply is a web platform for sharing and pooling subscriptions (Netflix, Spotify, etc.) among individuals. A "provider" creates a sharing group and invites "members" who pay their share via Stripe to access the shared subscription.Technical Stack
- Monorepo Turborepo (End-to-end TypeScript)
- Backend: AdonisJS 6, PostgreSQL (Lucid ORM), VineJS
- Frontend: Next.js 16 / React 19 (client area)
- Back-office: Refine 5 + Ant Design (Vite)
- Payment: Stripe (subscriptions, webhooks, payouts)
- Real-time: WebSocket / SSE (AdonisJS Transmit)
- Email: SMTP + Brevo
- DX: Docker, Caddy, Ngrok
My missions- Setting up the project architecture
- Developing MVP features (API + Web + Admin)
- Stripe integration (subscriptions, commissions, wallet payouts)
- Working on real-time messaging and sharing group management
- Maintaining API contract consistency between back, front, and back-office
- Ensuring quality: shared validation, strict typing, best practices
- MentorShowFull Stack Developer React Native & Adonis.jsEDUCATION AND E-LEARNINGApril 2025 - September 2025 (5 months)General Context:Developing new screens for version 2 of the iOS/Android and Web applicationDescriptionDevelopment of the following screens on iOS, Android, and Web (desktop and mobile) from Figma mockups:
- Home
- Masterclass
- Lesson
- Downloads
- My Account
Technical Stack:React Native, Adonis.js, PostgreSQLInteractions with services:Builder.io, Hubspot, Stripe, Algolia
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Education
- DA2I Bachelor's DegreeUniversity of Lille 12010