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Matthew Horan

PROFILE

Matthew Horan

Matt Horan focused on stability and reliability improvements across several React Native repositories, including facebook/react-native, mrousavy/react-native-reanimated, and Shopify/flash-list. He addressed complex issues in keyboard event handling and layout event persistence, refining async event flows and coordinate normalization to enhance user experience on iOS, particularly with multitasking and Stage Manager. Using TypeScript, C++, and JavaScript, Matt implemented targeted bug fixes such as safeguarding floating-point calculations in UI averaging logic and isolating event interception logic to prevent regressions. His work demonstrated careful debugging, robust test coverage, and a deep understanding of component development and cross-platform mobile UI challenges.

Overall Statistics

Feature vs Bugs

0%Features

Repository Contributions

5Total
Bugs
5
Commits
5
Features
0
Lines of code
269
Activity Months4

Work History

February 2026

1 Commits

Feb 1, 2026

February 2026 monthly summary for Shopify/flash-list focusing on stability and correctness of the AverageWindow calculation to prevent negative averages caused by floating-point precision errors, thereby avoiding layout issues and ensuring reliable UI rendering.

February 2025

1 Commits

Feb 1, 2025

February 2025 monthly summary for mrousavy/react-native-reanimated focusing on stabilization of onLayout behavior under the New Architecture and improving reliability of layout events through targeted interception controls and test coverage.

January 2025

2 Commits

Jan 1, 2025

January 2025 performance summary focusing on stabilizing iOS keyboard handling to improve user experience during animations and multitasking. Delivered high-impact fixes across two major RN projects to improve keyboard height reporting, stage-manager compatibility, and keyboard avoidance UX. Achieved measurable reliability improvements and reduced visual glitches, enabling smoother user experiences in complex layouts.

November 2024

1 Commits

Nov 1, 2024

November 2024 (2024-11) summary for githubnext/discovery-agent__facebook__react-native. Focused on stability improvements in async layout event handling. No new features released this month; primary work was a bug fix to ensure KeyboardAvoidingView onLayout events can access the event object in asynchronous flows. Implemented event.persist() to retain the event for async processing, preventing errors and improving reliability of keyboard-aware layouts. Commit: 68db74205afdd190304eb73ef71710781fa580b9 (ref: #47798). Impact: reduces runtime errors during dynamic keyboard interactions, enhances user experience, and aligns with robust debugging and maintenance practices. Technologies/skills demonstrated include JavaScript/React Native debugging, async event lifecycle management, and clear commit hygiene for traceability.

Activity

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Quality Metrics

Correctness96.0%
Maintainability84.0%
Architecture84.0%
Performance84.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

JavaScriptObjective-CObjective-C++TypeScriptcpptsx

Technical Skills

C++Component DevelopmentEvent HandlingMobile DevelopmentReact NativeReact Native DevelopmentReanimatedTypeScriptUI Developmentfront end developmentiOS Development

Repositories Contributed To

4 repos

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

mrousavy/react-native-reanimated

Jan 2025 Feb 2025
2 Months active

Languages Used

Objective-C++TypeScriptcpptsx

Technical Skills

Mobile DevelopmentReanimatediOS DevelopmentC++React NativeTypeScript

githubnext/discovery-agent__facebook__react-native

Nov 2024 Nov 2024
1 Month active

Languages Used

JavaScript

Technical Skills

Component DevelopmentEvent HandlingReact Native Development

facebook/react-native

Jan 2025 Jan 2025
1 Month active

Languages Used

JavaScriptObjective-C

Technical Skills

Mobile DevelopmentReact NativeUI DevelopmentiOS Development

Shopify/flash-list

Feb 2026 Feb 2026
1 Month active

Languages Used

TypeScript

Technical Skills

TypeScriptfront end development