Gianpaolo Papaiz

Gianpaolo Papaiz

Full-Stack Software Engineer | Ruby on Rails | React

São Paulo, Brazil

About

Full-stack software engineer with a background in Business Administration and a former founder. I built Protto — a hardware startup developing Arduino-based electronic kits — before transitioning into software in 2021. That experience shaped how I think about products and trade-offs, and it influences the way I engineer today. Currently, my core stack is Ruby on Rails and React.

Experience

CentralReach

Full-stack Software Engineer (Lead)

CentralReach

Nov 2021 – Present

Full stack developer on a lean team building a SaaS platform for ABA therapy companies. With a small team, ownership is total — from understanding the problem to shipping the solution independently, with minimal handoff. Day-to-day work spans bug fixes, new features, and performance improvements across the full stack, requiring a deep understanding of the entire application to navigate complex, often unstructured tasks effectively. The codebase spans multiple frontend technologies — Rails, React, Vue, and Angular — demanding quick context-switching and adaptability. In addition to my technical responsibilities as a developer, since jul 2023, I took on a leadership role coordinating the mobile and web teams. Day-to-day, I worked closely with engineering, product, and QA to ensure the right tasks were prioritized and that design and UI guidelines were followed. I also participated in hiring and onboarding new team members, and was responsible for structuring tasks based on business logic to keep the team aligned with the overall product goals.

Ruby On RailsReact
Wipro

Front End Software Engineer

Wipro

Jul 2021 – Nov 2021

Front end developer allocated to HP's engineering team, working on a customer-facing software product for their printers lineup. Collaborated within a large engineering organization while operating in a focused, small unit responsible for building and integrating React components with meticulous attention to design requirements. Worked with React and Storybook to deliver precise, reusable UI components aligned with the product's design system.

ReactStorybookRuby on Rails
Protto

Founder

Protto

Jan 2017 – Dec 2020

Founder of Protto — a small startup developing and selling Arduino-based DIY electronic kits for learning purposes. Led the entire operation with a team of three, wearing multiple hats across product development, hardware testing, component sourcing, and sales.

Arduino

Education

Le Wagon

Le Wagon

Full-Stack Developer Bootcamp · Computer Programming

2021 – 2021
SKEP

SKEP

Entrepreneurship Program · Entrepreneurship

2018 – 2018
Insper

Insper

Bachelor's degree · Business Administration

2012 – 2016

Certifications

Skills

REACTRuby on Rails

Languages

English (Full professional proficiency)Italian (Native or bilingual proficiency)Portuguese (Native or bilingual proficiency)Spanish (Limited working proficiency)