Freelancer profile translated to English.
Back to original languageAbout Rafik
Do you have a web or mobile project to launch?
Are you looking to integrate AI into your application?
I'm Rafik, a Full Stack Developer and AI Engineer with a Master's degree in Artificial Intelligence. I design and deliver complete applications — from React.js/Next.js frontend to Node.js APIs, including deployment and integration of AI features with LangChain and LangGraph.
What I've delivered in production:
→ Buy Bessa — two-sided mobile application, 50,000+ users, real-time chat, AI recommendations, intelligent chatbot
→ LangGraph Multi-Agent System — supervisor routing, RAG and web research specialized agents, complete observability via LangSmith
→ Ola Spa & Gym — multi-site management system, POS, inventory, React Native mobile application
→ Next.js websites for French clients (Nantes, Montpellier) in full remote, delivered on time
What you get by working with me:
✓ Production-ready React.js / Next.js / Node.js development
✓ AI Integration — LangChain/LangGraph agents, RAG pipelines, intelligent chatbots, recommendation systems
✓ Robust REST APIs with Express.js/NestJS and FastAPI, databases (MongoDB, PostgreSQL, Firebase, Supabase)
✓ Clean, maintainable, and documented code (TypeScript / JavaScript / Python)
✓ Proactive communication — response within hours
✓ On-time delivery — always
Stack:
React.js · Next.js · Node.js · FastAPI · TypeScript · MongoDB · WebSocket · LangChain · LangGraph · Python · React Native · Strapi · Railway · Vercel · VPS
Need a reliable developer for your next technical challenge? Contact me, I respond quickly.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Multi-Agent AI SystemAI EngineerFebruary 2026 - March 2026 (1 month)Designed a multi-agent system with LangGraph, including a supervisor agent routing requests to specialized sub-agents (RAG, web search, document processing). Exposed via a FastAPI API with a React frontend. Integrated LangSmith for complete observability and trace-level debugging.Stack: Python, LangGraph, LangChain, LangSmith, Groq (Llama 3.3 70B, llama 3.1 8b-instant), Chroma, FastAPI, React.
- Agent ERP ConversationnelAI EngineerDecember 2025 - December 2025Developed a conversational AI agent connected to a REST API (simulating an ERP), combining RAG retrieval, real-time tool-calling, and persistent conversation memory with session isolation per thread. Diagnosed and resolved tool-calling bugs via LangSmith traces.Stack: Python, LangChain, FastAPI, Chroma, Ollama, React.
- Bessa Promotion ImmobilièreFull Stack EngineerREAL ESTATEFebruary 2025 - Today (1 year and 6 months)Alger, AlgeriaDeveloped two digital ecosystems in production: Buy Bessa (50,000+ users), a two-sided mobile application with real-time chat, push notifications, AI recommendations, and an intelligent chatbot — and Ola Spa & Gym, a gym management system with a dashboard, POS, inventory management, and a mobile application. Architected 3 independent Node.js/Express/MongoDB backends, 3 admin dashboards, integrated Strapi CMS, and deployed on Vercel, Heroku, and VPS.Achievements & links:bessapromotion.combuybessa.bessapromotion.comolaspagym.com
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Education
- Master in Pattern Recognition and Artificial IntelligenceUniversité Hassiba Ben Bouali2024
- Bachelor's in Computer ScienceUniversité Hassiba Ben Bouali2022
Certifications
- Fundamentals of Deep LearningNVIDIA Deep Learning Institute2022