stefano profile

I'm Stefano — Backend Engineer with 4+ years building production systems that scale. Specialising in microservices, AI/LLM integration, and distributed systems.

[ Backend Engineer · AI Integration · Distributed Systems ]

Contact MeDownload CV

./About Me

I build backend systems that scale — microservices, event-driven architectures, and real-time data pipelines in Node.js, NestJS, and TypeScript. Over 4+ years I've shipped production infrastructure across healthcare, fintech, and logistics: systems processing 50,000+ daily messages, $50K+ monthly transactions, and HIPAA-compliant AI pipelines serving medical professionals daily.

My edge is the intersection of backend infrastructure and AI integration. I've built transcription services using OpenAI Whisper, RAG pipelines with LangChain and pgvector, and voice-driven outreach systems with real-time LLM orchestration — all in production, not just side projects.

I also understand how business decisions get made. Before engineering, I worked embedded in a business development team translating data insights into executive strategy — which means I build with commercial outcomes in mind, not just technical correctness.

See the work: github.com/snebo | stefano-nebo.vercel.app

./Projects

Zoom Meeting AI Bot

Headless Zoom meeting bot built on the C++ Meeting SDK — autonomously joins meetings, captures and transcribes audio in real-time with encrypted storage, multi-session concurrency, and WebSocket live updates.

  • > Node.js
  • > C++
  • > Docker
  • > WebSockets
  • > OAuth
  • > AWS

AI-Powered Transcription API

HIPAA-compliant speech-to-text service processing 200+ weekly dental consultations at 95% accuracy using OpenAI Whisper and custom medical templates — eliminating 2+ hours of manual documentation per doctor daily.

  • > Python
  • > OpenAI Whisper
  • > NVIDIA NeMo
  • > Flask
  • > Google Colab

Multi-Carrier Shipping Rate Engine

Production-grade NestJS shipping rate API with UPS OAuth 2.0 integration, token caching and auto-refresh, strategy pattern for carrier extensibility, structured error normalisation, and full E2E test coverage.

  • > NestJS
  • > TypeScript
  • > OAuth 2.0
  • > REST APIs
  • > Jest

My Diary Friend — Personalized AI

Privacy-first AI diary and personal assistant with semantic memory retrieval using vector embeddings (pgvector + gte-small), LangChain and Google Gemini for LLM orchestration, and full self-hosting via Docker.

  • > NestJS
  • > TypeScript
  • > LangChain
  • > pgvector
  • > PostgreSQL
  • > Supabase
  • > Docker

Python Chess Engine

Two-player graphical chess application with real-time move validation, OOP-based piece logic, and a custom game engine — prototyped in Ruby CLI before GUI development in PyGame.

  • > Python
  • > PyGame
  • > Ruby
  • > OOP
  • > Game Development

./My Skills

Languages

  • $ TypeScript
  • $ JavaScript
  • $ Python
  • $ SQL
  • $ C++

Backend

  • $ Node.js
  • $ NestJS
  • $ Express
  • $ Django
  • $ Flask
  • $ Ruby on Rails

Databases

  • $ PostgreSQL
  • $ MongoDB
  • $ Redis
  • $ Firebase

Cloud & DevOps

  • $ AWS (EC2, Lambda, S3)
  • $ Docker
  • $ Kubernetes
  • $ GitHub Actions
  • $ CI/CD
  • $ Linux

AI & ML

  • $ OpenAI API
  • $ LangChain
  • $ NVIDIA NeMo
  • $ Whisper ASR
  • $ LLM Integration

Messaging & Real-time

  • $ RabbitMQ
  • $ WebSockets
  • $ Event-Driven Architecture

Frontend (Supporting)

  • $ React
  • $ Next.js
  • $ Tailwind CSS

./Experience

./Education & Certifications

./Contact

Currently open to remote backend engineering roles — full-time or contract.
Please fill out the form or send me a mail at snebo54@gmail.com, and I'll get back to you as soon as possible.