Freelancer profile translated to English.
Back to original languageAbout SĂ©bastien
👨‍💻 Who am I?
As an AI & Fullstack Developer specializing in TypeScript, I help companies create and evolve high-performing, reliable, and scalable web products.
I work on both MVPs and existing applications, with a strong focus on architecture, performance, and maintainability.
I also integrate AI components into products to enhance features and create new use cases (assistants, content generation, data analysis, automations...).
🚀 How can I help you?
• Design and develop your product (SaaS, platform, business tool) from A to Z
• Create high-performing websites with Next.js, optimized for SEO and conversion
• Develop robust and scalable APIs with Node.js
• Integrate AI into your products: chatbots, content generation, assistants, data analysis, automations
• Take over and improve existing systems: performance, structure, technical debt
• Advise you on technical choices to build a solid and scalable foundation
🧩 Main Stack
Node.js (NestJS, Express, Fastify), TypeScript, React, Next.js, PostgreSQL, MongoDB
⚙️ Why work together?
• Fullstack expertise: from frontend to backend to deployment
• SaaS, B2B, and startup experience: understanding of business and technical challenges
• UX/UI oriented approach: intuitive, fast, and efficient interfaces
• Useful AI integration: automation of high-value tasks, product improvement, new features, productivity gains
• Smooth collaboration: clear communication, responsiveness, and rigorous follow-up
đź“ž Ready to launch your project?
Let's discuss your needs and see how I can support you from idea to production (response within 1 hour).
French
Native or bilingual
English
Native or bilingual
German
Basic
Can work on-site
Nancy (up to 50km), Nancy (up to 10km)
Experience
- My Piggy BuddyFull Stack DeveloperSOFTWARE PUBLISHINGMarch 2023 - May 2025 (2 years and 2 months)Metz, FranceExcel sheets are inconvenient when it comes to manage personal finances across different bank accounts. The goal here was to develop a web application as a user-friendly alternative to replace those excel sheets.You can understand and track where you are spending the most of your money but also to allocate your money to budgets and see their evolution over time.
- TadawebFullstack developer & Team LeaderTECHJanuary 2016 - Today (10 years and 7 months)Luxembourg, LuxembourgDevelopment of an event-driven microservices architectureSetting up good practices across backend engineers- Architecture of an event-driven microservices platform- Development and planning of features- Ensuring code quality- Managing production bugs and emergencies- Ensuring documentation is maintained and up-to-dateRegular 1:1 check-ins with engineers- Setting up OKRs- Growth evolution of each employee
- Agile Partner S.A.Mobile Developer / Backend DeveloperDIGITAL AND ITSeptember 2013 - January 2016 (2 years and 4 months)LuxembourgDevelopment and design of various iOS/Android applications and managing their deployment on stores:- for Luxembourg's leading platform in the real estate sector- Instagram-like app for someone in Luxembourg who wanted to compete with Instagram- video game (Guitar Hero-like on iPhone where you can play with your own music)Development of various Web applications and REST APIs:- leaderboard management- platform to manage employee resumes and automate their generation in different formats for tendersSuccessfully passed the Scrum Master certification
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Education
- Master's degree, Computer sciences and Computer GraphicUniversity of Strasbourg2013Master's degree, Computer sciences and Computer Graphic
- Licentiate degree, Computer ScienceUniversité Paul Verlaine, Metz2011Licentiate degree, Computer Science
Certifications
- Scrum Masteragilbee2014