EXCEEDS logo
Exceeds
Jakub Korytko

PROFILE

Jakub Korytko

Jakub Korytko engineered robust authentication and multifactor security features across Expensify/App and related repositories, focusing on biometric groundwork, secure storage, and cross-platform consistency. He integrated biometric authentication using Swift and Kotlin, unified SecureStore feedback models, and enhanced authentication flows to support scalable MFA with ED25519 cryptography. Jakub improved user experience by refining UI components, adding localization support, and addressing device compatibility. His work included strengthening CI/CD pipelines with Jest and GitHub Actions, stabilizing offline authentication, and implementing custom React hooks for state management. These contributions demonstrate depth in mobile security, frontend engineering, and full stack development within production environments.

Overall Statistics

Feature vs Bugs

55%Features

Repository Contributions

74Total
Bugs
13
Commits
74
Features
16
Lines of code
21,244
Activity Months3

Work History

February 2026

25 Commits • 3 Features

Feb 1, 2026

February 2026: Delivered targeted frontend improvements and localization for Expensify-App, while hardening offline/auth flows and PR workflows. Key outcomes include UI polish on the Prompt Page, a new Unsupported Device screen, Parrot language support, and significant bug fixes to PR comments/CI, offline authentication, and code quality that reduce user friction and improve reliability across MFA, registration, and protected routes. These efforts demonstrate strong frontend engineering, user-centric UX, and robust localization capabilities with measurable business impact in onboarding, device compatibility, and developer workflow.

January 2026

45 Commits • 11 Features

Jan 1, 2026

January 2026 focused on hardening security, reliability, and user experience for MFA-enabled flows across Expensify apps, with parallel work on UI, cryptography, context/state management, and test infrastructure. The efforts elevated security posture, reduced risk, and strengthened CI feedback loops, while delivering scalable MFA capabilities and improved user authentication UX.

September 2025

4 Commits • 2 Features

Sep 1, 2025

September 2025 focused on strengthening authentication security and cross‑platform consistency by delivering biometric groundwork and SecureStore enhancements across two related Expensify repositories. The work sets the foundation for biometric login, secure data handling, and improved UX around secure storage prompts, with targeted iOS/Android considerations and patches to underlying platform integrations.

Activity

Loading activity data...

Quality Metrics

Correctness88.8%
Maintainability86.0%
Architecture85.8%
Performance84.8%
AI Usage28.4%

Skills & Technologies

Programming Languages

JavaScriptKotlinSwiftTypeScriptXMLYAML

Technical Skills

API RefactoringAPI designAPI developmentAPI integrationAndroid DevelopmentAuthenticationCI/CDCross-Platform DevelopmentCustom HooksDependency ManagementDevOpsExpoGitHub ActionsJavaScriptJest

Repositories Contributed To

3 repos

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

callstack-internal/Expensify-App

Jan 2026 Feb 2026
2 Months active

Languages Used

JavaScriptTypeScriptXMLYAML

Technical Skills

API developmentCustom HooksJavaScriptMobile DevelopmentReactState Management

Expensify/App

Sep 2025 Jan 2026
2 Months active

Languages Used

YAMLJavaScriptTypeScript

Technical Skills

Dependency ManagementMobile DevelopmentiOS DevelopmentAPI integrationJavaScriptJest

software-mansion-labs/expensify-app-fork

Sep 2025 Sep 2025
1 Month active

Languages Used

KotlinSwiftTypeScript

Technical Skills

API RefactoringAndroid DevelopmentAuthenticationCross-Platform DevelopmentExpoMobile Development

Generated by Exceeds AIThis report is designed for sharing and indexing