Software Developer | Full-stack JavaScript / Node.js · LLM agents |

I'm a developer at Eyeconnect and a Computer Engineering student at UNIFESP, in São José dos Campos, Brazil.

At Eyeconnect, a medical imaging SaaS for ophthalmology clinics, I build and ship features on our Meteor + Node.js production web app, and I built and maintain the tooling that pulls exam files from the clinics into the platform. I built EyeAgent from scratch in Go: a background service installed at clinic sites that detects new exam files the moment the equipment saves them, uploads them to AWS S3, and triggers the OCR pipeline (AWS Textract), so the path from exam to processed data runs with no manual step. It runs today at several paying clinics. I also extended the AWS Textract pipeline to cover new exam types, and I work with the CTO on planning a full architectural redesign of the platform.

Before web, I spent close to a year on embedded systems for medical devices at Delta Life: firmware in C and C++ for devices such as multiparameter patient monitors, working both on new versions of products already on the market and on brand-new devices, plus hands-on hardware work. In parallel, at UNIFESP, I led the next hardware and firmware iteration of a low-cost insulin infusion pump research project, working largely on my own.

Over the last few years I've done a lot of LLM work: automation agents and content-classification pipelines. A couple of them are public on my GitHub.

Technologies I work with: JavaScript, Node.js, Python, Go, Meteor, React, MongoDB, SQLite, AWS (S3, Textract), Docker, Linux, C, C++, embedded firmware, LLM APIs (Gemini, Claude, Ollama, OpenAI).

Contact: joaorubensrm@gmail.com
GitHub: github.com/joaormonteiro