Freelancer profile translated to English.
Back to original languageAbout Nicolas
I design and deliver custom artificial intelligence solutions and fullstack TypeScript applications for companies, territories, and institutions with specific needs.
I combine expertise in AI development (RAG, chatbots, voice agents, vector embeddings, LLMs) with a complete fullstack covering web, backend, and mobile development.
No intermediary agency — I design, develop, and deliver autonomously.
AI Stack:
- OpenAI (GPT-4o), Google Gemini, Anthropic Claude or other integration · RAG pipelines on vector databases (Supabase pgvector, Pinecone)
- Speech recognition and synthesis (ElevenLabs, Web Speech API, Whisper)
- Multimodal image and audio recognition
- Prompt engineering & guardrails.
Fullstack Stack:
- Web Frontend: Next.js (App Router, Server Components, streaming)
- Mobile Frontend: React Native / Expo
- Backend: Node.js / NestJS
- CMS: Payload and other modern CMS
- TypeScript
- Tailwind CSS
- BaaS: Supabase / Firebase
- ORM: Prisma / Drizzle
- Payments: Stripe / RevenueCat
- Ops: Docker / Vercel / VPS
Among my achievements: an AI voice agent deployed for a local authority (RAG + ElevenLabs), a multi-tenant SaaS ERP for a professional sector, a multilingual chatbot (4 languages, natural TTS) for a major tourist site, and an active mobile application with AI integration (React Native + Expo + Firebase).
Available for custom AI missions, Next.js development, React Native development, and Node.js / NestJS backend architecture.
Full Remote · Montpellier / Occitanie.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Montpellier (up to 30km), Paris (up to 30km), Lyon (up to 30km), Toulouse (up to 30km)
Experience
- HelyiosCTO - Lead DeveloperSPORTSJanuary 2023 - September 2025 (2 years and 8 months)Montpellier, FranceSaaS mobile application for CrossFit® practitioners. With workout sharing similar to Strava.Full-stack development of SaaS with UI/UX mockups on Figma.Tech Stack:
- Frontend: Expo / React Native / Next.js
- Backend: Firebase
- Hosting: Vercel
- Subscriptions: RevenueCat
- La ChariotteCTO - Lead devRETAIL (SMALL BUSINESS)June 2020 - January 2022 (1 year and 7 months)Custom design and full development of the e-commerce platform La Chariotte (marketplace for 100% made-in-France products). UI/UX on Figma and development from scratch for mobile and web.Tech Stack:
- Frontend: React Native & React
- Backend: Firebase, Google Cloud Functions
- Payments: Stripe Connect (advanced payment system)
- cabinet lu-minFreelance DeveloperCIVIL ENGINEERINGFebruary 2023 - May 2023 (3 months)Montpellier, FranceHigh-end showcase website for a project management firm.Creation of a custom WordPress theme with project tracking features.Creation of custom plugins to integrate into WordPress:
- VCard and QR Code creation
- Photorealistic 3D render viewer for project immersion
Reviews
Rémi
NR'GILLIOT
Reviewed on 4/16/2022
Nicolas delivered a product that met our needs within the agreed timeframe. Thank you for your good judgment, responsiveness, and speed of execution. I will not hesitate to call on you again for future projects.
See you soon, Nicolas.
Nicolas has chosen to hide 1 review
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Education
- Technological Management LicenseIAE2018