Freelancer profile translated to English.
Back to original languageAbout Alexis Chân
I turn your ideas into intelligent Web & Mobile applications.
Experienced CTO & Lead Dev, I don't just write code: I build products that convert. I combine the robustness of React/Next.js with the power of new AIs (OpenAI, Claude) to create real competitive advantages.
What I can do for you:
Modern Web Development (SaaS & Internal Tools)
◉ Creation of scalable architectures in Next.js (App Router) & TypeScript.
◉ Fluid and responsive interfaces (Tailwind, Shadcn/ui, Framer Motion).
◉ Robust back-end (Node.js, Supabase, PostgreSQL).
AI Integration & Automation
◉ Creation of intelligent Chatbots on your own data (RAG).
◉ Integration of the OpenAI / GPT-4 API to automate your business processes.
◉ Content generation, document analysis, virtual assistants.
Cross-Platform Mobile
◉ Porting your Web application to mobile (iOS & Android) with React Native & Expo. A single codebase to manage everything.
◉ Expo, iOS/Android, App Store/Play Store
💼 My approach:
◉ Business First: Incubated and entrepreneur, I understand your KPIs (Cost of Acquisition, Retention).
◉ Clear Communication: Weekly reporting, regular demos, no unnecessary jargon.
◉ Clean Code: 2026 standards, strict typing, tests, CI/CD.
Frequently Asked Questions & Technical Stack:
◉ Do you work with agencies? Yes, accustomed to Agile, Scrum, Jira environments.
◉ What React versions? Expert React 18, React 19, Server Components, Next.js 14/15.
◉ Mobile Tools? React Native CLI, Expo Router, EAS Build, Apple Store Connect, Google Play Console.
◉ Databases? PostgreSQL, Supabase, Firebase, MongoDB, Prisma ORM.
◉ AI & LLM? OpenAI API integration and creation of intelligent assistants directly in your React/Next.js applications.
Preferred Stacks: React, Next.js, Node.js, TypeScript, OpenAI, Supabase, Firebase.
💬 Have a project in mind? Let's discuss its technical feasibility (Reply within 4h).
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- HAPPY MOOV
On Malt
React / React Native DeveloperSOFTWARE PUBLISHINGFebruary 2026 - February 2026Paris, FranceObjective:Strengthen the technical team during a project on a hybrid application (web PWA + mobile), and deliver a functional cross-platform push notification system on iOS, Android, and Web.Achievements:- Development and complete integration of the cross-platform push notification system (iOS & Android)- Rapid adaptation to the existing codebase and the team's current processes- Proactive contribution to technical architecture and code optimization- Delivery ahead of schedule, with documentation includedStack:React, Next.js, React Native, Expo, TypeScript, iOS, Android - OpkoeloRedesign and SSR Optimization (Next.js) - Showcase WebsiteSOCIAL NETWORKSFebruary 2026 - February 2026Objective:Refresh a content creator's showcase website to improve brand image and performance.Achievements:- Updated the front-end with React / Next.js, including style adjustments, adding new sections, and integrating several articles.- Transitioned to SSR (Server-Side Rendering) to improve loading times and natural referencing.Stack:Next.js, React.js, TypeScript, TailwindCSS.
- ChillZ IncProduct Lead & Chief Technical OfficerSOCIAL NETWORKSApril 2025 - Today (1 year and 4 months)New York, NY, USAObjective:Design and develop a next-generation dating application (Web + Mobile) with a personalized user experience and AI integration.Achievements:- Design and development of the mobile app in React Native / Expo, integrated with a real-time backend.- Implementation of initial AI assistant modules (profile suggestions, messages, events) based on user data.- Creation of the landing page and showcase website in Next.js / React, SEO optimized for acquisition.Stack:React Native, Expo, React, Next.js, TypeScript, Firebase, Stripe, Mapbox.
Reviews
S
Souad
Développement et intégration d'un système de notifications push cross-platform En React, Nextjs, React Native, Expo. (iOS & Android) - HAPPY MOOV
Reviewed on 2/24/2026
Alexis is an Expert! In React, Nextjs, React Native, Expo. It's not easy to integrate a freelancer mid-project. Especially someone who can adapt to the existing team and project requirements. I can say Alexis went above and beyond his mission. He showed rare professionalism, relevance, proactivity, and motivation. Alexis quickly intervened on our React, NextJS PWA and React Native mobile application to develop and integrate a cross-platform push notification system (iOS & Android). The delivered code is clean, well-structured, and directly integrated into our codebase without friction. Smooth communication throughout the project, delivery on time, even faster than expected. I recommend him without hesitation for any mobile and web development.
Élodie
Développeur web - Opkoelo
Reviewed on 2/16/2026
Very good experience with Alexis, a React/Next.js + AI expert, responsive, pedagogical, and serious. Clean deliveries on time, we will work with him again.
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Education
- BUT InformatiqueIUT Nancy-CharlemagneDéveloppement d'application sécurisée
- Business Analysis, and Digital StrategyHaute école de Gestion de Fribourg (HEG-FR)2024
Certifications
- AWS Academy Graduate - Cloud Web Application BuilderAmazon Web Services2025
- Inside LVMH Certificate — Creation & BrandingLVMH2025