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Rodrigo Lino da Costa

PROFILE

Rodrigo Lino Da Costa

Worked across Expensify/App and related repositories to deliver features and stability improvements in front-end and mobile development. Focused on React and React Native, this developer enhanced UI responsiveness by optimizing memoization, refactoring components, and simplifying data flow. They standardized payment type representations in expensify-common using TypeScript, enabling consistent analytics and vendor integrations. Addressed technical debt by cleaning up code, improving linting, and managing dependencies with Git and Gradle. Their work included stabilizing submodule dependencies, preventing Android telemetry crashes, and refining validation logic, resulting in more maintainable code and reliable user experiences across both web and mobile platforms.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

44Total
Bugs
10
Commits
44
Features
15
Lines of code
18,049
Activity Months5

Work History

March 2026

24 Commits • 11 Features

Mar 1, 2026

Concise monthly summary for 2026-03 focused on delivering stable features, reducing technical debt, and improving performance for Expensify-App.

February 2026

4 Commits • 1 Features

Feb 1, 2026

February 2026: Expensify-App (callstack-internal) delivered performance and correctness enhancements targeted at the PureReportActionItem flow and related React components. The work focused on simplifying the component prop surface, strengthening memoization, and aligning implementations with coding standards to reduce rendering overhead and prevent UI inconsistencies during rapid updates. This included consolidation of commits to remove dead props, fix stale references, and ensure stable scroll/edit behavior across the ReportActionItem pathway. Overall, the month improved UI responsiveness, stability, and maintainability in a high-activity area of the front-end, with practical business value in faster render cycles and fewer UI glitches during report actions processing.

January 2026

8 Commits

Jan 1, 2026

Monthly summary for 2026-01 focusing on key accomplishments, business impact, and technical excellence across all repos touched this month.

September 2025

7 Commits • 2 Features

Sep 1, 2025

September 2025 monthly summary for Expensify/App: focused on stabilizing dependencies, enhancing eReceipt rendering, and hardening custom field validation. Delivered three major outcomes: 1) Submodule dependency updates aligning Mobile-Expensify and related submodules with the correct dependency versions, reducing build drift. 2) Distance eReceipt support and rendering improvements with more reliable detection and improved rendering for image sources and future PDF-based eReceipts, including cleanup. 3) Custom field validation improvements ensuring fields with defaults are not required when missing, preventing false positives. Impact includes increased build stability, improved eReceipt UX, and more reliable data validation. Demonstrated skills in multi-repo coordination, UI rendering considerations, and validation logic, using Git submodules, refactoring, and cleanup across the codebase.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024: Delivered foundational standardization for payment type representations across the codebase. Implemented new constants PAY_AT_HOTEL and PAY_AT_VENDOR in CONST.ts and extended the PAYMENT_TYPE object in Expensify/expensify-common to enable consistent cross-repo usage and future enhancements. This groundwork reduces ambiguity in payment handling, streamlines analytics, and supports scalable vendor integrations. No major bugs fixed this month.

Activity

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Quality Metrics

Correctness94.6%
Maintainability91.0%
Architecture90.0%
Performance91.8%
AI Usage22.8%

Skills & Technologies

Programming Languages

GitGradleJSONJavaScriptNoneRubyTypeScript

Technical Skills

Android developmentConstants definitionFront End DevelopmentFront-end DevelopmentFrontend DevelopmentFull Stack DevelopmentJavaScript developmentMobile DevelopmentNode.jsNoneReactReact NativeSubmodule ManagementTypeScriptVersion Control

Repositories Contributed To

3 repos

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

callstack-internal/Expensify-App

Jan 2026 Mar 2026
3 Months active

Languages Used

TypeScriptJavaScriptGradleNoneRuby

Technical Skills

TypeScriptclean codefront end developmentFront End DevelopmentFull Stack DevelopmentReact

Expensify/App

Sep 2025 Jan 2026
2 Months active

Languages Used

GitJavaScriptTypeScript

Technical Skills

Front-end DevelopmentFrontend DevelopmentMobile DevelopmentReact NativeSubmodule ManagementTypeScript

Expensify/expensify-common

Dec 2024 Jan 2026
2 Months active

Languages Used

TypeScriptJSONJavaScript

Technical Skills

Constants definitionJavaScript developmentdependency managementlintingpackage management