Bernardo Belchior
React Engineer at MUI
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolBernardo Belchior is a React engineer with 10 years of front-end experience, currently contributing to MUI after leading frontend teams at Rows and earlier engineering work at Amazon. He specializes in data-rich React UIs and charts—contributing to MUI X Charts and improving performance and tooltip behavior—and has hands-on experience testing and hardening visualization libraries including a Flutter charting grammar. Having worked across Porto, London, Munich and Berlin, he blends international product experience with technical leadership, shipping features and guiding teams. Outside product work he has organized record-attendance student events and led a 40-person client-facing virtual company, demonstrating strong project management and stakeholder skills.
10 years of coding experience
7 years of employment as a software developer
Integrated Master in Informatics and Computing Engineering Informatics and Computing Engineering, Integrated Master in Informatics and Computing Engineering Informatics and Computing Engineering at Faculdade de Engenharia da Universidade do PortoMaster of Engineering - MEng Informatics, Master of Engineering - MEng Informatics at Technical University of Munich
Portuguese, English, Spanish, German
Stackoverflow
59reputation
2kreached
1answer
1question
Github Skills (23)
data-visualizations10
javascript10
flutter-apps10
testing10
charts10
typescript10
data-visualisation10
chartjs10
charting10
automation10
automation-testing10
front-end-development10
typescript-types10
data-visualization10
automations10
Programming languages (16)
Github contributions (5)
mui/mui-x
Feb 2025 - Apr 2025
MUI X: Build complex and data-rich applications using a growing list of advanced React components, like the Data Grid, Date and Time Pickers, Charts, and more!
Role in this project:
Front-end Developer
Front-end DeveloperContributions:250 reviews, 84 PRs, 35 pushes in 1 month
Contributions summary:Bernardo primarily contributed to the MUI X Charts library, focusing on the implementation and improvement of various chart components. Their work involved updating default color values, adding new features like a custom color prop for the SparkLineChart, and deprecating the `colors` prop. The user also contributed to documentation, adding a demo for the Scatter Chart with linked points and fixing tooltip placement issues. They also improved the performance of x-axis tick rendering.
data-gridreactcasesuse-casesmui
entronad/graphic
Mar 2022 - May 2022
A grammar of data visualization and Flutter charting library.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:9 reviews, 7 commits, 10 PRs in 2 months
Contributions summary:Bernardo primarily focused on testing the Flutter charting library. They added tests for the `DodgeModifier`, a feature related to chart layout. Additionally, they fixed a bug and improved existing code related to number handling in charting functionalities, including fixing stack overflows and handling large numbers.
chartsflutter-packagechartcharting-librarydata-and-visualization
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