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Caainã Jeronimo

PROFILE

Caainã Jeronimo

During four months at MetaMask, Caainaje developed and enhanced delegation and prediction features across core, extension, and mobile repositories. They built a centralized DelegationController in MetaMask/core using TypeScript and Node.js, streamlining delegation management by eliminating external dependencies and ensuring a secure, auditable workflow. In MetaMask/metamask-extension, Caainaje integrated remote-mode delegation, improved transaction visibility, and implemented UI indicators with React and Redux, supporting robust remote signer workflows. On MetaMask/metamask-mobile, they delivered Predict feature enhancements, including input validation, batched transaction flows, and UI/UX improvements using React Native and JavaScript, addressing both user experience and reliability in on-chain interactions.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

13Total
Bugs
1
Commits
13
Features
4
Lines of code
30,470
Activity Months4

Work History

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

Correctness91.6%
Maintainability86.2%
Architecture87.0%
Performance79.2%
AI Usage47.6%

Skills & Technologies

Programming Languages

CSSJSONJavaScriptTypeScripttsx

Technical Skills

API IntegrationBack End DevelopmentComponent DevelopmentComponent LibraryComponent Library UsageController ArchitectureController DevelopmentDependency ManagementEVMEthereumFront End DevelopmentFull Stack DevelopmentJavaScriptJestMonorepo

Repositories Contributed To

3 repos

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

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/metamask-mobile

Oct 2025 Oct 2025
1 Month active

Languages Used

JSONJavaScriptTypeScripttsx

Technical Skills

API IntegrationComponent DevelopmentComponent LibraryFull Stack DevelopmentJavaScriptJest

MetaMask/core

Apr 2025 Apr 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Controller DevelopmentEVMMonorepoNode.jsSmart ContractsTypeScript

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