Freelancer profile translated to English.
Back to original languageAbout 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 (connecting to internal databases), automated content generation
✅ Chatbots & Intelligent Assistants: Designing 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 freelancing experience
Available for your web development, AI integration, chatbot creation, intelligent automation, and LLM-augmented SaaS tool projects.
Feel free to contact me.
French
Native or bilingual
English
Fluent
Hebrew
Native or bilingual
Remote only
Primarily works remotely
Experience
- BlueberriesFounding EngineerTECHMarch 2026 - Today (5 months)Founding Engineer in an early-stage fintech & AI startup, with complete ownership of the entire product cycle — from understanding client needs (stated and unstated) to demo and post-integration support.Architecture and full-stack development of the main product, from database to deployment.Direct presentation of features to clients during product demos.Team development of the conversational agent integrated into Blueberries' SaaS dashboard, allowing each client organization to have its own AI assistant connected to its data. System features:
- Multi-tenant architecture: routing each organization to its own tool catalog (KPI data, P&L, and HubSpot stored in Supabase)
- Claude-based tool-calling agent via Amazon Bedrock
- Security: RBAC access control applied server-side before each tool call
- Persistent conversation memory per thread
- Cost/latency optimization via prompt caching on a voluminous system prompt
- JPMEFull StackENERGY AND UTILITIESAugust 2024 - Today (2 years)
- 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 notifications by email to streamline workflows
- Deployment of the project on a VPS with Docker and Caddy, setting up staging and production environments, supporting teams in mastering internal tools.
- Front-end improvement: UI/UX, implementation of searches and forms with optimized user experience
- Database restructuring and large-scale client migration to ensure consistency and prepare for scaling
- Continuous support: process optimization, bug fixing, and delivery improvement
- Liora (ex Datascientest)Full StackEDUCATION AND E-LEARNINGJuly 2023 - Today (3 years and 1 month)
- Development of tools and automations for Business and Finance teams to optimize operational efficiency
- Automations in HubSpot: invoice generation from 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
Reviews
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- BSc.Technion Institute of Technology2017Computer Sciences