marimo-team/marimo
Nov 2025 – Jan 2026
2 Months active
Languages Used
PythonTypeScript
Technical Skills
backend developmentdata manipulationfrontend developmenttestingData VisualizationPython Programming
Holden X
PROFILE
Holden X
Worked on the marimo-team/marimo repository to deliver two core features over two months, focusing on data visualization and UI development using Python and TypeScript. Developed explicit aggregation column selection for Group By transforms, aligning backend and code generation to ensure only user-specified columns are aggregated, which improved data integrity and reduced errors from unsupported types. Enhanced the frontend by introducing UI-driven formatting for dataframe values, allowing customized display without altering underlying data. Both features included comprehensive testing and UI updates, demonstrating a methodical approach to backend and frontend integration while prioritizing user control, data integrity, and maintainable code quality.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
2
Lines of code
386
Activity Months2
Your Network
160 peopleWork History
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026: Delivered UI-driven formatting for dataframe values in Marimo, enabling customized display without mutating underlying data. Implemented support for format_mapping for dataframe as table, enhancing display flexibility and readability. No major bugs fixed reported this month. This work improves dashboards by making data presentation clearer while preserving data integrity.
1 Commits • 1 Features
Jan 1, 2026January 2026: Delivered UI-driven formatting for dataframe values in Marimo, enabling customized display without mutating underlying data. Implemented support for format_mapping for dataframe as table, enhancing display flexibility and readability. No major bugs fixed reported this month. This work improves dashboards by making data presentation clearer while preserving data integrity.
January 2026
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary focusing on delivering explicit aggregation column selection for Group By transforms, with backend/codegen alignment, UI updates, and tests. This work improves data integrity and user control by preventing unsupported aggregations and ensuring only chosen columns are aggregated.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary focusing on delivering explicit aggregation column selection for Group By transforms, with backend/codegen alignment, UI updates, and tests. This work improves data integrity and user control by preventing unsupported aggregations and ensuring only chosen columns are aggregated.
Activity
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage40.0%
Skills & Technologies
Programming Languages
PythonTypeScript
Technical Skills
Data VisualizationPython ProgrammingUI Developmentbackend developmentdata manipulationfrontend developmenttesting
Repositories Contributed To
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