Freelancer profile translated to English.
Back to original languageAbout François
⚡️ React.js Next.js Developer – UI / UX Designer
🥇 8 years of experience · ⭐ 5/5 on +50 missions · 🚀 Immediate availability
💡 Developer + Designer + AI + n8n, by the same person.
📩 Your project in 15 min.
Your idea deserves more than a simple prototype.
As a senior React.js developer and AI expert (AI agents, RAG), I turn it into a complete product (Supabase, embedded AI, n8n), performant and turnkey by guiding you on every technical and product decision, so you understand what you're launching and can evolve it with confidence.
🎨 Starting from scratch, without design?
I design the UX and mockups before development.
🤖 Want to integrate Artificial Intelligence into your product?
Chatbot, AI agent, RAG, n8n automation, I integrate these AI agents directly into your Next.js product, connected to Supabase.
How I help my clients go from idea to product:
1️⃣ Design & develop your Next.js from A to Z
→ Next.js · React.js · Supabase · TypeScript
→ API integrations & AI agents, n8n
→ Dashboards, Supabase auth, Stripe payments
2️⃣ Decide with complete clarity
→ A React.js developer who explains every choice (costs, risks, impact)
→ You know where the budget is going and what it brings
→ Full control after delivery (access, docs)
3️⃣ Refine UX and design
→ Pixel-perfect Figma integration
→ Landing pages that convert
→ Fast applications, designed to grow
🚀 My method
React.js developer & designer mastering Artificial Intelligence, I make every step clear, concrete, transparent: why a choice, how it works, what are the next steps.
Result: a reliable, scalable product.
📩 Let's scope your project in 15 min: feasibility, budget, deadlines, no commitment.
🛠 Stack: React.js · TypeScript · Supabase · OpenAI RAG · AI Agent · n8n
French
Native or bilingual
English
Fluent
Spanish
Conversational
Remote only
Primarily works remotely
Experience
- LPP Distribution
On Malt
React.Js | Next.Js Developer | AI Agent | n8nENTERTAINMENT AND LEISUREMarch 2026 - April 2026 (1 month)Paris, France🎯 The CompanyLPP is a B2B SaaS platform for music broadcasting for professional establishments (bars, restaurants, hotels, cafes).Legally compliant playlists, without SACEM constraints.As a Next.js Web Developer & UI/UX Designer, I took charge of the entire project: UX/UI, mockups, and development.🎯 ResponsibilitiesComplete solo design + development as a Next.js Web Developer & UI/UX Designer- UX/UI Design & Mockups: Art direction, design system, interactive prototypes, mobile/desktop responsive- Onboarding 6 activities with intelligent reclassification + SIRET lookup via Pappers- Persistent audio player (queue, crossfade, shuffle, preload, keyboard shortcuts)- Bunny.net CDN Streaming, direct client upload (bypass Vercel 4.5MB limit)- Stripe Billing: webhooks, self-service portal, monthly/annual- Admin dashboard (URL filters, bulk edit)- Dual-event tracking (listen logs threshold 10s + active_session)- Multi-JWT auth, cross-device, progressive cooldown🎯 Organization and MethodologyTotal autonomy: design → dev → deployment.Direct contact with the founder/CEO. 1.5 months, 220+ commits, modular architecture, 18 features.🏆 Impact and Notable Results- Coherent design system applied to 40+ reusable components- Smooth streaming for sessions >5h, simultaneous broadcasting to multiple establishments- End-to-end onboarding <5 min (SIRET → signed contract → payment)- Player loading <2s, CDN latency <100ms- GDPR compliance, Upstash rate limiting, feature-by-feature Supabase RLS🎯 Technical Context- Framework: Next.js 16, TypeScript- Design / UI: Tailwind 4, Radix UI, custom design system- Backend / DB: Supabase (Postgres, Auth), Upstash Redis- Payment: Stripe (subscriptions, webhooks, portal)- Streaming / CDN: Bunny.net, Edge Runtime- External APIs: Pappers (SIRET), SACEM/SPRE - Goldbroker LtdReact.Js | Next.Js Developer | AI Agent | n8nPRIVATE EQUITYNovember 2025 - February 2026 (2 months)Londres, United Kingdom🎯 The CompanyOr.fr (GoldBroker) is a major player in precious metal investment in Europe.The platform allows the purchase of certified LBMA physical gold and silver,with secure storage in international vaults.Present in several countries with a multilingual website (FR/EN/DE),the company assists thousands of individual and institutional investors.🎯 ResponsibilitiesAs a React.js & Next.js developer, my responsibilities included:- Participating in the complete refactoring of V2 of the platform with migration toNext.js 15 App Router- Designing and developing the Design System architecture (80+ components) used bythe entire team- Implementing optimized user journeys for conversion (purchase funnel,interactive guides)🎯 Organization and MethodologyI participated in the complete refactoring of the Or.fr e-commerce platform.The team consisted of 5+ people:- 4-5 Front-end Developers- 1 Product Owner- 1 UI/UX DesignerI worked autonomously on complete functional areas, with weekly reportingand regular synchronization with the team.🏆 Impact and Notable ResultsI contributed to the following developments:- Reduction of initial loading time by 40% thanks to Server Components andSSR streaming- Implementation of a scalable monorepo architecture (Turborepo) enabling paralleldevelopment- Modular Design System reducing the integration time of new pages by 60%🎯 Technical Context- React.js 19 / Next.js 15 (App Router, Server Components)- Strict TypeScript- Monorepo Architecture (Turborepo + pnpm workspaces)- Custom Design System (Panda CSS, tokens, recipes)- Headless CMS (Sanity, Payload)- Testing (Vitest, Playwright)- CI/CD (GitLab, Vercel)
- SatisfactionReact.Js | Next.Js Developer | AI Agent | n8nENTERTAINMENT AND LEISUREDecember 2025 - January 2026 (1 month)Paris, France🎯 The CompanyLe Lupanar Paris is a high-end Parisian private club offering exclusive eventsand private space rentals.The establishment was looking for a web developer to create its digital platform and professionalize the management of its members, events, and reservations.🎯 ResponsibilitiesAs a web developer and UI/UX designer specializing in React.js and Next.js, I designed and developed the entire platform from scratch:- Creation of mockups- Complete visual identity- Authentication system with 4 dynamic registration flows.- Event management with drag-and-drop calendar- Matching algorithm based on 9 criteria- Integration of SumUp payment (ApplePay, GooglePay, Credit Card)- Reservation system with time slots- Automatic pricing, admin CRM with 50+ filters and CSV export- Blog with Tiptap rich editor, 12 transactional email templates- Google Calendar synchronization🎯 Organization and MethodologyCompletely solo mission as a web developer and designer, in directcontact with the founder.I managed the entire cycle: art direction, mockup creation, prototyping, Next.js architecture, React.js development, and deployment on Vercel. Agile approach with iterative deliveries and visual validation at each sprint.🏆 Impact and Notable Results- Platform delivered in 4 weeks (design + dev)- 13 validation schemas, 7 event types managed.- The payment system includes automatic refund management and webhook deduplication.- The CRM supports 1000+ members with advanced filtering.🎯 Technical Context- Next.js 15 (App Router)- React.js 19- TypeScript- Tailwind CSS v4- Supabase (PostgreSQL, Auth, Realtime, Storage)- SumUp API- Google Calendar API- Resend •- Framer Motion & GSAP- Vercel
Reviews
Recommendations
LC
MP
+4
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Education
- Computer Solution Design and Development, Information Technology / Information Systems Technology422021Activités et associations : Membre de l'association étudiante CPP Vice Président de l'association Le bouchon 42, c’est la première formation en informatique entièrement gratuite, ouverte à tous et accessible aux 18-30 ans. Sa pédagogie, c’est le peer-to-peer learning : un fonctionnement participatif qui permet aux étudiants de libérer toute leur créativité grâce à l’apprentissage par projets. L’établissement a été fondé par Florian Bucher, Xavier Niel, Nicolas Sadirac et Kwame Yamgnane en 2013 alors que l’industrie du numérique est en plein manque de développeurs informatiques en France. Pour former en grand nombre les meilleurs talents de demain, l’école met à disposition la meilleure infrastructure dans un lieu unique et moderne.
- Master, Science and Techniques of Physical and Sports ActivitiesUniversité Paris Cité2017Activités et associations : Membre de l’épicerie solidaire qui lutte contre la précarité étudiante Organisation des compétitions inter-universitaires La formation vise à développer des compétences dans le domaine de la conception, du pilotage et de l’expertise de programmes d’entraînement, d’optimisation de la performance sportive et de ré-athlétisation. Il s’agit d’une formation pluridisciplinaire qui articule des enseignements scientifiques (dans les domaines des sciences de la vie, sciences humaines, sciences sociales, et sciences pour l’ingénieur), technologiques et professionnels.
Certifications
- Codin Game Javascript CERTIFICATION Web DeveloperCodin Game2023
- Codin Game Typescript CERTIFICATION Web DeveloperCodin Game2023