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Joe Cho

PROFILE

Joe Cho

Over a three-month period, contributed to the mbta/orbit repository by building and enhancing real-time transit data visualization features and improving the design system. Developed new React components and Elixir backend integrations to support live train position updates, station data visualization, and robust routing between landing and operator pages. Standardized Tailwind CSS color tokens for accessibility and consistency, and implemented robots.txt controls for SEO management. Focused on test coverage and codebase hygiene, including updating tests for UI changes and maintaining clean repository configuration. Leveraged TypeScript, Elixir, and CSS to deliver reliable, maintainable features without introducing new bugs during this period.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

10Total
Bugs
0
Commits
10
Features
7
Lines of code
1,783
Activity Months3

Work History

May 2025

4 Commits • 3 Features

May 1, 2025

May 2025 performance summary for mbta/orbit: Delivered key customer-visible features with improved data handling and testing, enhanced routing and site controls, and maintained strong code quality through focused commits.

April 2025

4 Commits • 2 Features

Apr 1, 2025

April 2025 performance summary for mbta/orbit: Delivered two major features expanding real-time visibility and station data visualization. Implemented frontend UI and backend data integration to provide live transit context and data structures for RTR feeds. No major bugs reported this period; focused on feature delivery, test coverage, and environment/config changes to support reliability. Impact includes improved data freshness for operators, a new visualization pathway for station data, and a solid foundation for future real-time analytics. Technologies span React frontend routing, Elixir routers, GenServer-based polling, RTR JSON parsing, environment configuration, and test scaffolding.

January 2025

2 Commits • 2 Features

Jan 1, 2025

Concise monthly summary for 2025-01 focused on the mbta/orbit repository. Delivered UI/design-system improvements, standardized color tokens, and updated tests to reflect accessibility and consistency. Minor repo hygiene tasks completed to reduce noise in the codebase.

Activity

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Quality Metrics

Correctness92.0%
Maintainability92.0%
Architecture92.0%
Performance86.0%
AI Usage22.0%

Skills & Technologies

Programming Languages

CSSElixirHTMLJavaScriptSVGTextTypeScript

Technical Skills

API IntegrationBackend DevelopmentCSSComponent DesignComponent DevelopmentConfiguration ManagementData ModelingData ParsingElixirFront End DevelopmentFront-end DevelopmentFrontend DevelopmentGenServerReactReal-time Data Processing

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

mbta/orbit

Jan 2025 May 2025
3 Months active

Languages Used

SVGTypeScriptCSSElixirJavaScriptHTMLText

Technical Skills

CSSComponent DevelopmentFront-end DevelopmentFrontend DevelopmentTailwind CSSUI/UX