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Nathaniel CohnNC

Nathaniel Cohn

Fullstack - Automation - AI Agent - Chatbot

€450/day
Paris, FR
3-7 years

Average response time: 2 hours

Freelancer profile translated to English.
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About Nathaniel

Full-Stack Engineer specializing in integrating AI into existing products.

Full-Stack Developer expert in React, Node.js, and scalable architectures, I help companies integrate artificial intelligence solutions (LLMs & AI agents) into their SaaS products, internal tools, and web platforms.

My approach: connecting AI to real systems (APIs, databases, CRMs, business workflows) to create intelligent, automated, and truly useful applications in production.

I work on the entire development cycle: architecture, LLM integration, AI agent design, cloud deployment, and performance optimization.

Areas of Expertise

✅ Web & SaaS Development: React, Next.js, TypeScript, Node.js
✅ AI & LLM Integration: OpenAI, Claude, AI agents, prompt engineering, RAG (connection to internal databases), automated content generation
✅ Chatbots & Intelligent Assistants: design of chatbots connected to APIs, CRMs, or business databases
✅ AI-Augmented Automation: intelligent workflows, data enrichment, advanced synchronization
✅ Back-end & API: scalable architectures, REST API, microservices
✅ Databases: PostgreSQL, Prisma, Drizzle
✅ Cloud & DevOps: AWS, Vercel, DigitalOcean, Supabase, Docker
✅ CRM Integrations: HubSpot (workflows, marketing & sales automation, API synchronization)

What I bring to your projects

⭐ Concrete integration of AI into existing products
⭐ Design of AI agents connected to your internal data
⭐ Intelligent automation of business processes
⭐ Product vision + business understanding
⭐ Startup, scale-up, and freelance experience

Available for your web development, AI integration, chatbot creation, intelligent automation, and LLM-augmented SaaS tool projects.

Do not hesitate to contact me.
  • French

    Native or bilingual

  • English

    Fluent

  • Hebrew

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • JPME
    Full Stack
    ENERGY AND UTILITIES
    August 2024 - Today (1 year and 10 months)
    • Development and improvement of Partner (client onboarding) and Admin (data management and access) platforms, strategic company tools
    • Optimization of automated billing (PDF generation from XML files)
    • Integration of key external APIs (DocuSign, Pennylane, Enedis, GoCardless, etc.) with automation of client email notifications to streamline workflows
    • Deployment of the project on a VPS with Docker and Caddy, setup of staging and production environments, support for teams in using internal tools.
    • Front-end improvement: UI/UX, implementation of searches and forms with optimized user experience
    • Restructuring of the database and large-scale client migration to ensure consistency and prepare for scaling
    • Continuous support: process optimization, bug resolution, and delivery improvement
    Digital Ocean React Next.js PostgreSQL Prisma
  • DataScientest
    Full Stack
    EDUCATION AND E-LEARNING
    July 2023 - Today (2 years and 11 months)
    • Development of tools and automations for Business and Finance teams to optimize operational efficiency
    • Automations in HubSpot: invoice generation from the CRM and workflow creation to enrich client information
    • Design of a web scraping tool to collect and analyze market job offers displayed on a job board
    • Automated extraction of key information from CVs received by email to speed up the recruitment process
    • Creation of optimized landing pages to support marketing campaigns
    AWS Python NodeJS Hubspot React.js
  • Mira
    Full Stack Developer
    SOCIAL NETWORKS
    May 2022 - July 2022 (3 months)
    Development, in collaboration with a colleague, of an application allowing the user to:
    • connect to their profile via AWS authentication services
    • view the different experiences offered by Mira in the Metaverse, with their descriptions
    • follow the activity of their friends (experiences they participated in, dates, etc.)
    • access a Gallery page to view photos taken during the experiences they participated in.
    React Native AWS MySQL Prisma JavaScript

Recommendations

Emmanuel BismuthEB
David MamouDM
Emmanuel Bismuth and 1 other person have recommended Nathaniel

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Education

  • BSc.
    Technion Institute of Technology
    2017
    Computer Sciences

Skill set

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