Guilherme Grillo is an Associate Product Manager and computer science student at Universidade de São Paulo, bringing seven years of software experience and a strong front-end focus. He spent two years as a front-end engineer at Rocket.Chat, contributing UX and UI fixes across their flagship open-source platform and its React-based design system, Fuselage. Technically fluent in React, TypeScript, React Native, Next.js and modern testing tools, he pairs implementation skills with Figma-driven design sensibilities. Guilherme has rotated through full-stack and product-facing roles at fintech and startup teams, recently joining Nubank as an APM. He combines hands-on bug fixes and component work with product thinking—often improving import flows, avatars, and upgrade UI—so he bridges developer ergonomics and user-facing outcomes. Based in São Paulo, he’s notable for moving smoothly between engineering, design, and Scrum leadership on international squads.
The communications platform that puts data protection first.
Role in this project:
Full-stack Developer
Contributions:105 reviews, 67 commits, 40 PRs in 11 months
Contributions summary:Guilherme primarily contributed to bug fixes and improvements related to the user interface and import functionality within the Rocket.Chat platform. They addressed issues in the CSV import process, resolving errors and enhancing user selection. The user also worked on the upgrade tab, making improvements to its display and positioning. Additional contributions include fixes related to user avatars, sidebar components, and the home page, showcasing a broad involvement in the platform's front-end and user experience.
React port of Rocket.Chat's design system, Fuselage
Role in this project:
Front-end Developer
Contributions:8 reviews, 13 commits, 9 PRs in 6 months
Contributions summary:Guilherme primarily contributed to the Rocket.Chat's design system, Fuselage, by modifying React components. Their work involved updating UI elements like the setup wizard, top bar, and dropdown components. They also made changes to message preview elements, and fixed several bugs. Furthermore, they added and modified React components related to design, styling, and functionality.
monoreporeactrocketchatchatfuselage
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.