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Caainã Jeronimo

PROFILE

Caainã Jeronimo

Caainaje worked across MetaMask/core, MetaMask/metamask-extension, and MetaMask/metamask-mobile, building robust delegation management and prediction features. They introduced a centralized DelegationController in MetaMask/core, streamlining delegation signing and lifecycle management without external dependencies. On MetaMask/metamask-extension, Caainaje integrated remote-mode delegation, enhancing transaction visibility and governance with React, TypeScript, and Node.js. Their work on MetaMask/metamask-mobile focused on the Predict feature, delivering advanced betting flows, live data visualizations, and UI/UX improvements using React Native and Redux. Throughout, Caainaje emphasized state management, error handling, and test coverage, resulting in maintainable, scalable code that improved reliability and user experience across multiple platforms.

Overall Statistics

Feature vs Bugs

82%Features

Repository Contributions

61Total
Bugs
6
Commits
61
Features
27
Lines of code
63,535
Activity Months8

Work History

February 2026

6 Commits • 4 Features

Feb 1, 2026

February 2026 monthly summary for MetaMask/metamask-mobile: Delivered core Predict-related enhancements and analytics instrumentation to improve UX, visibility, and configurability. Key feature deliveries include improved Predict buy flow with deferred balance checks, a remote-configurable Hot tab in the Predict feed, deeplink enhancements for direct tab navigation and search, and enhanced deposit analytics tracking. No explicit bug fixes were documented this month; the work focused on refactors, feature delivery, and instrumentation to support experimentation and business insights. The combined results improved user flow during market volatility, enabled safer deposits with better visibility, and set the stage for rapid experimentation via feature flags.

January 2026

9 Commits • 3 Features

Jan 1, 2026

January 2026 monthly summary focusing on key accomplishments for MetaMask Mobile. Highlights include delivery of Predict UI enhancements with a reusable dual-line chart for win probability and live pricing, live updates on action buttons, and optimistic position updates; expansion of sports coverage with NBA support and Superbowl card integration in the wallet carousel; and reliability improvements through deposit validation and Polygon network config checks. These efforts enhanced real-time decision making, reduced user friction, and strengthened resilience across payments and network states.

December 2025

6 Commits • 4 Features

Dec 1, 2025

December 2025: MetaMask Mobile delivered a focused set of features and reliability improvements across betting, UI, and Predict workflows, strengthening user confidence, reducing edge-case errors, and improving maintainability.

November 2025

27 Commits • 12 Features

Nov 1, 2025

Nov 2025 — MetaMask Mobile delivered key user-facing features, stability improvements, and architectural refinements. Notable outcomes include: consent sheet UX with net deposit calculation, refactoring accounts logic into a reusable accounts utility, enabling Predict to run on non-EVM networks, comprehensive UI/UX and error-handling enhancements in the Predict flow, and auto-refresh for optimistic positions. Additional improvements include deposit toast UX enhancements, design-system migration for Text components, and skeleton loaders for order preview to improve perceived performance and reliability.

October 2025

6 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for MetaMask/metamask-mobile focusing on Predict feature enhancements and stability improvements. Delivered a comprehensive set of user-facing improvements to the Predict feature, including an enhanced betting component with input validation, a streamlined claim winnings flow with batched transactions and toast feedback, withdrawal functionality, and general UI/UX refinements and state management for a better user experience. Addressed rendering gaps for claimable and resolved positions, ensuring correct UI state and updated tests to reflect the changes. This work reduces on-chain interaction friction, improves reliability of winnings claims, and strengthens overall feature maturity.

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary focused on enabling remote signer workflows in the MetaMask extension by delivering Remote Mode Support in the Activity List. This work enhances transaction visibility, correctness of presented data, and lays groundwork for secure remote signing features.

May 2025

5 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for MetaMask/metamask-extension: Delivered the delegation framework integration and remote-mode daily allowance enhancements, enabling secure, scalable remote-mode delegation management across signing, storage, revocation, daily allowances, and UI visibility. Implemented through a series of commits integrating the delegation-controller and delegation-toolkit, adding a UI banner, and introducing afterAdd hook and MultiTokenPeriod daily allowance caveat. These changes reduce friction in delegated operations, strengthen security controls, and improve governance workflows for remote delegations.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for MetaMask/core. Focused on delivering a centralized delegation management and signing workflow by introducing the DelegationController, establishing a single hub for delegation operations. The controller handles signing, storing, listing, retrieving, chaining, and deleting delegations directly from the requester, reducing reliance on external tools and maintaining a lean, auditable lifecycle. Key commit driving this feature: 14c8ec56fe83e81209805008ea0cc8f58f38a169 (feat: add delegation controller (#5592)).

Activity

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Quality Metrics

Correctness94.6%
Maintainability84.6%
Architecture86.8%
Performance82.8%
AI Usage37.4%

Skills & Technologies

Programming Languages

CSSJSONJavaScriptTypeScripttsx

Technical Skills

API IntegrationAPI integrationBack End DevelopmentComponent DevelopmentComponent LibraryComponent Library UsageController ArchitectureController DevelopmentDependency ManagementEVMEthereumFront End DevelopmentFull Stack DevelopmentHooksJavaScript

Repositories Contributed To

3 repos

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

MetaMask/metamask-mobile

Oct 2025 Feb 2026
5 Months active

Languages Used

JSONJavaScriptTypeScripttsx

Technical Skills

API IntegrationComponent DevelopmentComponent LibraryFull Stack DevelopmentJavaScriptJest

MetaMask/metamask-extension

May 2025 Jun 2025
2 Months active

Languages Used

JSONJavaScriptTypeScriptCSS

Technical Skills

Back End DevelopmentComponent Library UsageController ArchitectureDependency ManagementEthereumFront End Development

MetaMask/core

Apr 2025 Apr 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Controller DevelopmentEVMMonorepoNode.jsSmart ContractsTypeScript

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