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Kirill Zyusko

PROFILE

Kirill Zyusko

Over a nine-month period, this developer advanced the MetaMask/metamask-design-system and related repositories by building and migrating a comprehensive suite of React Native UI components, including modals, buttons, skeleton loaders, and accessibility features like ModalFocus. Their work emphasized design system integration, accessibility, and cross-platform consistency, using TypeScript, JavaScript, and React Native. They addressed concurrency and compatibility issues, improved keyboard handling, and authored migration guides to streamline adoption. Through rigorous testing with Jest and detailed documentation, they enhanced developer velocity and user experience, ensuring stable, accessible interfaces and maintainable code across both web and mobile environments in the MetaMask ecosystem.

Overall Statistics

Feature vs Bugs

77%Features

Repository Contributions

86Total
Bugs
6
Commits
86
Features
20
Lines of code
30,568
Activity Months9

Work History

May 2026

1 Commits • 1 Features

May 1, 2026

May 2026: Key accessibility feature delivered for the MetaMask design system. Implemented ModalFocus component to trap focus within modal dialogs, improving keyboard navigation and screen reader support across the design system. Migrated focus-trap usage to an integrated approach with react-focus-lock, adding support for initialFocusRef, finalFocusRef, restoreFocus, and autoFocus. Added Storybook docs and unit tests; exported ModalFocus (and related types) from the design-system barrel. Prepared migration guidance and dependency updates (MIGRATION.md; lockfile changes).

April 2026

36 Commits • 5 Features

Apr 1, 2026

In April 2026, I delivered a coordinated wave of Design System Migration (DSRN) work across MetaMask mobile and the design-system package, aimed at unifying UI, accessibility, and developer velocity. The work emphasized migrating core components to DS RN, expanding modal and toast capabilities, and documenting migration paths to reduce future friction. Business value was realized through a consistent cross-platform user experience, easier maintenance, faster UI iteration, and improved testability across the mobile codebase.

March 2026

32 Commits • 10 Features

Mar 1, 2026

March 2026 focused on accelerating a unified, design-system–driven platform across MetaMask web and mobile. Key investments centered on delivering cohesive UI primitives, expanding migration coverage, and increasing developer velocity through standardized components, tests, and docs. The month culminated in a set of foundational primitives and migrations that reduce fragmentation and enable faster, more reliable product iterations.

February 2026

11 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary for MetaMask/metamask-design-system focused on delivering a robust RN design system foundation and stabilizing the development environment.

December 2025

1 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for mrousavy/react-native-reanimated: Delivered a migration guide to ease transition from the deprecated useAnimatedKeyboard to the react-native-keyboard-controller, aligning with the deprecation plan and supporting a smooth upgrade path for users. The effort focused on documentation and upgrade workflows to maintain functionality and reduce support load during the transition. No major bug fixes were recorded this month; the primary accomplishment was improving developer experience and upgradeability.

November 2025

1 Commits • 1 Features

Nov 1, 2025

November 2025: Focused on API stability and migration planning for keyboard handling in React Native Reanimated. Delivered deprecation of useAnimatedKeyboard with a migration path to react-native-keyboard-controller, and published a migration guide to ease adoption. No user-facing bug fixes this month; all work targets long-term stability and developer experience by aligning keyboard handling APIs with the dedicated controller.

February 2025

1 Commits

Feb 1, 2025

February 2025 monthly summary for microsoft/react-native-macos focusing on reliability fixes in the text input path. Implemented a concurrency-safe fix for TextWatcher listeners in ReactEditText to prevent ConcurrentModificationException during listener modifications. The change uses CopyOnWriteArrayList to safely iterate while updates occur, reducing crash risk and improving editor stability on macOS React Native apps.

December 2024

2 Commits

Dec 1, 2024

December 2024 monthly summary: Delivered targeted bug fixes in critical libraries to improve stability, API compatibility, and test reliability across React Native Reanimated and macOS. The changes reduce regression risk for downstream apps and external integrations, while showcasing strong cross-repo collaboration and rapid problem resolution.

November 2024

1 Commits

Nov 1, 2024

Month: 2024-11 — Bluesky Social: Monthly summary focused on stabilizing chat UI in bluesky-social/social-app. Key bug fixed: Keyboard Handler Memoization Fix in Dialog and MessagesList. This fix resolves missing dependencies in the useKeyboardHandler hook so the handler re-evaluates when keyboard state changes, preventing stale state UI issues in Dialog and MessagesList. Commit 723bbfc58a1bb30ee0eed8e2e61d06bff2f10ece (fix: keyboard handler memoization (#6719)).

Activity

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Quality Metrics

Correctness93.2%
Maintainability88.4%
Architecture89.8%
Performance88.6%
AI Usage34.8%

Skills & Technologies

Programming Languages

JavaJavaScriptMarkdownObjective-C++TypeScript

Technical Skills

AccessibilityAndroid DevelopmentBug FixingComponent DesignComponent DevelopmentComponent MigrationConcurrencyDependency ManagementFront End DevelopmentJavaScriptJestMobile DevelopmentReactReact NativeTesting

Repositories Contributed To

6 repos

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

MetaMask/metamask-design-system

Feb 2026 May 2026
4 Months active

Languages Used

JavaScriptTypeScriptMarkdown

Technical Skills

Component DesignComponent DevelopmentDependency ManagementFront End DevelopmentMobile DevelopmentReact

MetaMask/metamask-mobile

Mar 2026 Apr 2026
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

Component MigrationFront End DevelopmentJestReactReact NativeTesting

microsoft/react-native-macos

Dec 2024 Feb 2025
2 Months active

Languages Used

Objective-C++Java

Technical Skills

Bug FixingReact NativeiOS DevelopmentAndroid DevelopmentConcurrency

mrousavy/react-native-reanimated

Nov 2025 Dec 2025
2 Months active

Languages Used

TypeScriptJavaScriptMarkdown

Technical Skills

Reactfront end developmentReact Nativedocumentationmigration guides

bluesky-social/social-app

Nov 2024 Nov 2024
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

JavaScriptMobile DevelopmentReactTypeScriptUI Development

software-mansion/react-native-reanimated

Dec 2024 Dec 2024
1 Month active

Languages Used

TypeScript

Technical Skills

JavaScriptReact NativeTesting