Looking for a job

João Rubens Rezende Monteiro

@joaormonteiro

Fullstack and backend dev, ~2 years across web (Node.js, React, Python) and embedded C/C++. Co-founder of EfficienceCo, developer at Eyeconnect.

Brazil

Message

What I'm looking for

I want a small, fast engineering team where I own features end to end, learn from senior engineers, and solve hard backend and automation problems. ~2 years across full-stack web (Node.js, React, Next.js, Python) and embedded C/C++. Fully remote in UTC-3, available as a contractor via Deel or Wise. Extra interest in health tech and dev tooling.

Computer Engineering student at UNIFESP with close to two years of professional experience across full-stack web development and embedded systems.

Currently a developer at Eyeconnect, a medical imaging startup, where I ship features on the production app and own the clinic-side data ingestion tooling. I built EyeAgent from scratch in Go, a service running at paying clinics that automates the path from exam completion to processed data through AWS S3 and an OCR pipeline.

I co-founded EfficienceCo, a SaaS product that automates accounting firm workflows through an autonomous local agent plus a cloud API. I built the Node.js API and the Python agent, lead three developers, and run the commercial side.

Before that I spent 11 months on embedded firmware in C and C++ for a medical device at Delta Life and a UNIFESP research group.

I work fully remote in UTC-3 and I'm available as an international contractor via Deel, Rippling or Wise. Comfortable working async in English.

Experience

Work history, roles, and key accomplishments

Current

Developer

Current

Eyeconnect

Nov 2025 - Present (10 months)

Developed features for a medical imaging SaaS in ophthalmology, including a Go-based background service for automated file uploads and OCR pipeline integration. Co-designed a platform rewrite and managed production deployments.

JavaScript MeteorJS Blaze NodeJS Go S3 AWS MongoDB Git

Current

Co-Founder (Technical and Commercial)

Current

EfficienceCo

Mar 2026 - Present (6 months)

Founded and leads EfficienceCo, a product that automates recurring workflows in accounting firms. Oversees both engineering and commercial operations, including system architecture, team leadership, and end-to-end go-to-market.

NodeJS React Next.js Python Git REST APIs Database Design Team Leadership Sales Go To Market

Embedded Systems Developer

Delta Life

Nov 2024 - Sep 2025 (10 months)

Developed and optimized firmware in C and C++ for MSP430 microcontrollers, implementing ADC sensor readings, stepper motor control, and UART serial communication for a medical-grade prototype. Calibrated analog sensors, integrated actuators, wrote validation tests and technical documentation, and contributed to hardware prototyping via 3D printing.

C C++MSP430 UART ADC Embedded Systems 3D Modeling

Education

Degrees, certifications, and relevant coursework

Universidade Federal de São Paulo (UNIFESP)

Bachelor of Science and Technology, Computer Engineering

2024 - 2027

Activities and societies: CNPq and FAPESP funded scientific initiation in embedded medical devices; two software internships.

Pursuing an interdisciplinary Bachelor of Science and Technology with a Computer Engineering concentration. Relevant coursework includes algorithms, data structures, and computer architecture, alongside research and internships in embedded medical devices.