Full Stack Software Engineer // Buenos Aires, AR

Julio
Demartini

Coding since 2013. I started out publishing my own games, and today I build backends, frontends and AI agents that handle sensitive data in production.

Base
Buenos Aires, Argentina
Coding since
2013
Now
Protegetuviaje.com
Focus
Full stack · AI agents
Languages
Español · English

Who I am

I am a software engineer based in Buenos Aires. I like software that actually gets used: the kind with real users on the other side that has to keep running.

I started in 2013 making Android games on my own, servers included. Then I spent several years building web platforms for clients in very different industries. Today I work at Protegetuviaje.com, an insurtech, where I maintain the backends and design the AI agents that handle medical cases.

Outside of work I keep building my own things. The main one is Regnum Tools, a set of tools for the community of a realm-versus-realm war MMORPG.

Things I built

Protegetuviaje.com · 2024 – now

AI agents for medical cases

In production

When a medical case comes in, several LLM agents work on it before it reaches a person: one does the triage, another analyzes coverage and another classifies it.

I designed those pipelines and the backends behind them. The system searches clinics in real time over a RAG knowledge base, and has retry logic and latency optimizations for agent cold starts.

PythonNode.jsPHP / CakePHPMongoDBMySQLLLMRAG

Own project · 2026 – now

Regnum Tools

Live

Free tools for Champions of Regnum players: a live war map that updates every minute, damage and mitigation calculators, a power trainer with builds you share by link, and alerts for forts, bosses and BattleZone.

PythonNode.jsSQLite
regnumtools.com

Own project · Coming soon

PIT Custom Apparel

In progress

An online clothing store. It is what I am building right now.

Knowdo Studio · 2021 – 2024

QR coupons and course platforms

A platform where users redeem discounts at partner stores with a QR code, online course platforms with integrated payments, and websites for companies in different industries.

LaravelVue.jsMySQL

Independent · 2013 – 2019

Android games

Games and apps published on Google Play, built end to end: design, native development and the servers for the multiplayer features.

AndroidJavaPHP

The path

  1. 2013

    My own games

    I design, code and publish Android games and apps. I build the servers for their online features myself, and that is how I get into backend.

  2. 2021

    Products for clients

    At Knowdo Studio I build everything from landing pages to full platforms, with Laravel and Vue.js.

  3. 2024

    Frontend and AI

    I build the frontend of a course platform for Master Class Photographers with Nuxt.js, and I join Protegetuviaje.com.

  4. Now

    Agents in production

    I maintain several backends and add AI agents to the medical case system as they are needed. In my spare time I work on my own projects.

Toolbox

Backend
  • Node.js / Express
  • Python / FastAPI / Django
  • PHP / Laravel / CakePHP
AI
  • LLM agents
  • Multi-agent pipelines
  • RAG
Frontend
  • React / Next.js
  • Vue.js / Nuxt.js
  • TypeScript
Data and infrastructure
  • MySQL · MongoDB
  • DigitalOcean
  • GitHub Actions

Contact

If you want to write to me, this is my email.

[email protected]