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Carlos Martins

PROFILE

Carlos Martins

Over six months, contributed to stability and maintainability across Expensify/App, software-mansion-labs/expensify-app-fork, and callstack-internal/Expensify-App by focusing on targeted bug fixes and strategic feature reversions. Addressed issues in React and TypeScript codebases, such as restoring merchant rules workflows, aligning export logic with backend expectations, and reverting changes that impacted report selection and approval flows. Utilized skills in configuration management, build systems, and front end development to ensure compatibility and reduce regression risk. Demonstrated disciplined rollback practices, precise code reversion, and thorough regression checks, resulting in improved reliability and consistent user experience without introducing new user-facing features.

Overall Statistics

Feature vs Bugs

10%Features

Repository Contributions

11Total
Bugs
9
Commits
11
Features
1
Lines of code
14,402
Activity Months6

Work History

March 2026

2 Commits • 1 Features

Mar 1, 2026

March 2026 monthly summary for repository callstack-internal/Expensify-App. Focused on deprecating a risky bulk-edit workflow and stabilizing the build by reverting Hermes bundling changes. No new features were shipped this month; two major adjustments were completed to mitigate risk and improve maintainability.

February 2026

3 Commits

Feb 1, 2026

February 2026 monthly summary for callstack-internal/Expensify-App: Restored critical merchant rules workflow and improved export integrity. Key actions included reverting experimental changes that disabled MerchantRulesSection rendering in production, re-enabling merchant rules functionality, and aligning export status checks with backend logic. These changes stabilized core merchant functionality and enhanced reporting accuracy, delivering measurable business value to merchant customers and internal QA processes.

January 2026

1 Commits

Jan 1, 2026

January 2026: Restored selection for empty reports on the Reports page by reverting a conflicting change. This fixed a critical UX blocking issue and preserved the integrity of the reporting workflow. Demonstrated disciplined maintenance focus with regression-safe rollback and minimal surface area changes in Expensify/App.

October 2025

2 Commits

Oct 1, 2025

Month 2025-10 — Focused on stabilizing the Expensify App fork by reverting targeted features and API behaviors to prevent regressions and reduce maintenance burden. No new customer-facing features shipped this month. Two high-priority bugs were resolved via precise reversions, restoring predictable data flows and API usage, delivering reliability and maintainability improvements.

September 2025

1 Commits

Sep 1, 2025

September 2025 monthly summary for software-mansion-labs/expensify-app-fork focused on stability of GBR display logic for approvers when reports contain only held expenses. Reverted the prior fix that altered GBR visibility, restoring the previous require-attention behavior, and cleaned up related unit tests that became irrelevant due to the revert. This work improves accuracy of the approval workflow and reduces confusion for approvers.

February 2025

2 Commits

Feb 1, 2025

February 2025 monthly summary focusing on reliability and compatibility across critical repos. No new user-facing features were shipped this month. Two high-impact bug fixes were implemented to stabilize runtime behavior and ensure consistent resource references, delivering measurable business value by preserving compatibility with legacy systems and preventing reference errors across builds.

Activity

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Quality Metrics

Correctness81.8%
Maintainability81.8%
Architecture78.2%
Performance76.4%
AI Usage23.6%

Skills & Technologies

Programming Languages

CJavaScriptPeggyTypeScript

Technical Skills

BabelBuild SystemsCCode ReversionConfiguration ManagementInternationalizationJavaScriptMetroMobile DevelopmentNode.jsReactReact NativeRefactoringTypeScriptUnit Testing

Repositories Contributed To

5 repos

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

callstack-internal/Expensify-App

Feb 2026 Mar 2026
2 Months active

Languages Used

TypeScriptJavaScript

Technical Skills

ReactTypeScriptfront end developmentBabelMetroNode.js

software-mansion-labs/expensify-app-fork

Sep 2025 Oct 2025
2 Months active

Languages Used

TypeScriptJavaScriptPeggy

Technical Skills

TypeScriptUnit TestingCode ReversionConfiguration ManagementInternationalizationJavaScript

Expensify/Bedrock

Feb 2025 Feb 2025
1 Month active

Languages Used

C

Technical Skills

Build SystemsCVersion Control

Expensify/react-native-live-markdown

Feb 2025 Feb 2025
1 Month active

Languages Used

No languages

Technical Skills

No skills

Expensify/App

Jan 2026 Jan 2026
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

ReactTypeScriptfront end development