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Agata Kosior

PROFILE

Agata Kosior

Agata Kosior developed and maintained core features for the Expensify/App and its forks, focusing on expense reporting, workspace flows, and reimbursement processes. She implemented workspace-based report creation, enhanced navigation, and introduced offline-ready data loading, improving user experience and reliability. Her work included integrating tax calculation logic, policy management, and access control, using JavaScript, TypeScript, and React. Agata prioritized code quality through rigorous linting, type checking, and refactoring, addressing over ninety bugs and delivering seventeen features in four months. Her contributions strengthened maintainability and business value by reducing onboarding friction, improving reporting accuracy, and ensuring robust, resilient workflows across repositories.

Overall Statistics

Feature vs Bugs

16%Features

Repository Contributions

249Total
Bugs
92
Commits
249
Features
17
Lines of code
6,313
Activity Months4

Work History

February 2026

46 Commits • 2 Features

Feb 1, 2026

February 2026 (2026-02) monthly summary for callstack-internal/Expensify-App. Highlights include delivery of Quick Action, FAB Create Report button, navigation and multi-page flow stabilization, offline-ready data loading improvements, memoization enhancements, and code-quality / type-safety improvements. These efforts reduce user friction, improve resilience, and strengthen maintainability, delivering business value through faster, more reliable flows and improved offline experience.

January 2026

33 Commits • 4 Features

Jan 1, 2026

January 2026 performance summary for Expensify platform: Delivered key features and major bug fixes across Expensify/App and internal Expensify-App with a strong focus on business value, reliability, and code quality. Activities emphasized tax accuracy, policy alignment, reimbursement flow robustness, and offline resilience, complemented by targeted code quality improvements.

October 2025

90 Commits • 7 Features

Oct 1, 2025

October 2025 performance highlights for software-mansion-labs/expensify-app-fork: Delivered a workspace-centric reporting workflow, default workspace behavior, unreported-expenses reporting option, and report-field integration. Implemented broad navigation and UI polish, paywall gating alignment, and rigorous code-quality improvements to reduce defects and improve maintainability. Business impact includes faster onboarding, reduced misreporting, and improved policy applicability across workspace expenses.

September 2025

80 Commits • 4 Features

Sep 1, 2025

September 2025 monthly summary focusing on delivering core features, improving upgrade and reporting UX, and stabilizing codebase across Expensify/App and its fork. Major momentum came from upgrading the Workspace flow, introducing and internationalizing the reports feature, and enhancing upgrade/navigation in the fork. These changes reduce onboarding time, improve financial reporting accuracy, and boost maintainability through consistent linting, type checking, and dependency management.

Activity

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Quality Metrics

Correctness87.0%
Maintainability86.2%
Architecture82.4%
Performance84.2%
AI Usage23.8%

Skills & Technologies

Programming Languages

JavaScriptTypeScript

Technical Skills

API DevelopmentAPI IntegrationAPI integrationAccess ControlAction HandlingBug FixingCode FormattingCode OrganizationCode RefactoringConditional RenderingCustom HooksESLintFront End DevelopmentFront-end DevelopmentFrontend Development

Repositories Contributed To

3 repos

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

software-mansion-labs/expensify-app-fork

Sep 2025 Oct 2025
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

API IntegrationAction HandlingBug FixingCode FormattingCode RefactoringConditional Rendering

callstack-internal/Expensify-App

Jan 2026 Feb 2026
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

API integrationCode RefactoringReactSoftware MaintenanceTypeScriptfront end development

Expensify/App

Sep 2025 Jan 2026
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

Code FormattingFront-end DevelopmentFrontend DevelopmentInternationalizationLintingLocalization

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