KatharineZhang/ButterWalk
Dec 2024 – Jul 2025
7 Months active
Languages Used
JavaScriptTypeScriptReact NativeJSX
Technical Skills
Backend DevelopmentExpress.jsNode.jsTypeScriptWebSocketExpo Router
Katharine Zhang
PROFILE
Katharine Zhang
Katharine Zhang developed core real-time ride handling and user authentication features for the ButterWalk repository, focusing on scalable backend workflows and robust onboarding. She implemented WebSocket-enabled ride coordination using Node.js, Express, and TypeScript, establishing maintainable server infrastructure for live updates. On the frontend, she built and refined sign-in and account creation flows in React Native, integrating Firebase Authentication and enforcing input validation for data integrity. Her work included mapping enhancements with Mapbox and MapViewDirections, UI/UX improvements, and rigorous code organization through centralized styling and dependency management. Zhang’s contributions addressed both user experience and system reliability, demonstrating strong full-stack engineering depth.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
36Total
Bugs
6
Commits
36
Features
14
Lines of code
31,950
Activity Months7
Your Network
8 people
Work History
July 2025
2 Commits
Jul 1, 2025July 2025 monthly summary for KatharineZhang/ButterWalk. Focused on stabilizing the sign-in UX by reverting unintended changes to the sign-in page and its styling, ensuring production parity and reducing user confusion. Reverted updates to signin.tsx and styles.tsx, removed the 'Bypass Signin' button, standardized 'Driver NetId' text, and restored margins in styles.tsx.
2 Commits
Jul 1, 2025July 2025 monthly summary for KatharineZhang/ButterWalk. Focused on stabilizing the sign-in UX by reverting unintended changes to the sign-in page and its styling, ensuring production parity and reducing user confusion. Reverted updates to signin.tsx and styles.tsx, removed the 'Bypass Signin' button, standardized 'Driver NetId' text, and restored margins in styles.tsx.
July 2025
May 2025
8 Commits • 2 Features
May 1, 2025May 2025 (ButterWalk, KatharineZhang): Delivered two user-facing navigation enhancements and one code-quality fix, driving faster pickup times, improved route accuracy, and maintainability. Key features include live directions from the user’s current location to pickup, leveraging MapViewDirections for first-mile routing when no ride is active, and real-time location snapping via WebSocket and Mapbox Map Matching API with robust input validation and security hardening. A UI cleanup on onboarding removed an unused import to address lint/style issues and improve developer velocity. These changes collectively reduce friction for riders, improve ETA accuracy, and strengthen security and code quality.
May 2025
8 Commits • 2 Features
May 1, 2025May 2025 (ButterWalk, KatharineZhang): Delivered two user-facing navigation enhancements and one code-quality fix, driving faster pickup times, improved route accuracy, and maintainability. Key features include live directions from the user’s current location to pickup, leveraging MapViewDirections for first-mile routing when no ride is active, and real-time location snapping via WebSocket and Mapbox Map Matching API with robust input validation and security hardening. A UI cleanup on onboarding removed an unused import to address lint/style issues and improve developer velocity. These changes collectively reduce friction for riders, improve ETA accuracy, and strengthen security and code quality.
April 2025
9 Commits • 3 Features
Apr 1, 2025April 2025 performance highlights for KatharineZhang/ButterWalk focusing on delivering high-value user experiences, reliable navigation, and maintainable code. Key outcomes include UX-driven sign-in improvements, pre-ride walk directions and waypoint-based routing, robust phone number validation for data integrity, and codebase stabilization through dependency upgrades and linting.
9 Commits • 3 Features
Apr 1, 2025April 2025 performance highlights for KatharineZhang/ButterWalk focusing on delivering high-value user experiences, reliable navigation, and maintainable code. Key outcomes include UX-driven sign-in improvements, pre-ride walk directions and waypoint-based routing, robust phone number validation for data integrity, and codebase stabilization through dependency upgrades and linting.
April 2025
March 2025
7 Commits • 2 Features
Mar 1, 2025Monthly summary for 2025-03 focused on delivering maintainable UI foundations, stabilizing core routing, and documenting feature experiments that informed future work. Highlights include UI styling consolidation for ButterWalk, a prototype for user information confirmation with API/docs work (which evolved and was ultimately removed), and routing/lint improvements that increased stability and code hygiene. The combined work reduced future maintenance costs, clarified expected behavior for sign-in flows, and demonstrated strong proficiency in code health practices and documentation.
March 2025
7 Commits • 2 Features
Mar 1, 2025Monthly summary for 2025-03 focused on delivering maintainable UI foundations, stabilizing core routing, and documenting feature experiments that informed future work. Highlights include UI styling consolidation for ButterWalk, a prototype for user information confirmation with API/docs work (which evolved and was ultimately removed), and routing/lint improvements that increased stability and code hygiene. The combined work reduced future maintenance costs, clarified expected behavior for sign-in flows, and demonstrated strong proficiency in code health practices and documentation.
February 2025
6 Commits • 4 Features
Feb 1, 2025February 2025 (Month: 2025-02) focused on establishing a solid authentication foundation and real-time sign-in capabilities for ButterWalk, while delivering UX refinements and stability improvements. Key features delivered include Firebase-based User Authentication (registration with email verification), Real-time Sign-In via WebSockets, Sign-In Redirect Handling improvements, and UI/UX polish for authentication screens. Major bugs fixed include a WebSocket ConnectMessage handling bug and an edge-case in User Creation when phoneNum or studentNum are NULL. Overall, this work reduced onboarding friction, improved session reliability, and laid groundwork for scalable, real-time user interactions, delivering tangible business value. Technologies demonstrated include Firebase Authentication, WebSockets, TypeScript/JavaScript, client-server messaging, and UI/UX design.
6 Commits • 4 Features
Feb 1, 2025February 2025 (Month: 2025-02) focused on establishing a solid authentication foundation and real-time sign-in capabilities for ButterWalk, while delivering UX refinements and stability improvements. Key features delivered include Firebase-based User Authentication (registration with email verification), Real-time Sign-In via WebSockets, Sign-In Redirect Handling improvements, and UI/UX polish for authentication screens. Major bugs fixed include a WebSocket ConnectMessage handling bug and an edge-case in User Creation when phoneNum or studentNum are NULL. Overall, this work reduced onboarding friction, improved session reliability, and laid groundwork for scalable, real-time user interactions, delivering tangible business value. Technologies demonstrated include Firebase Authentication, WebSockets, TypeScript/JavaScript, client-server messaging, and UI/UX design.
February 2025
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 ButterWalk monthly summary: Delivered key onboarding and real-time communication improvements with a focus on security, reliability, and developer efficiency. Introduced role-aware WebSocket communication to differentiate clients (STUDENT) for server-side handling, tightened authentication workflows with a robust account creation UI and sign-in validation, and laid groundwork for email verification. Also resolved a UI stability issue in the map rendering. These changes strengthen user onboarding, real-time interaction correctness, and overall system reliability, with clear commit-level traceability that supports rapid iteration and QA.
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 ButterWalk monthly summary: Delivered key onboarding and real-time communication improvements with a focus on security, reliability, and developer efficiency. Introduced role-aware WebSocket communication to differentiate clients (STUDENT) for server-side handling, tightened authentication workflows with a robust account creation UI and sign-in validation, and laid groundwork for email verification. Also resolved a UI stability issue in the map rendering. These changes strengthen user onboarding, real-time interaction correctness, and overall system reliability, with clear commit-level traceability that supports rapid iteration and QA.
December 2024
1 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12: Delivered foundational server-side real-time ride handling for ButterWalk by implementing a WebSocket-enabled workflow and the accompanying server infrastructure. This work lays the groundwork for live ride coordination and scalable real-time features, with a focus on maintainability and observability.
1 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12: Delivered foundational server-side real-time ride handling for ButterWalk by implementing a WebSocket-enabled workflow and the accompanying server infrastructure. This work lays the groundwork for live ride coordination and scalable real-time features, with a focus on maintainability and observability.
December 2024
Activity
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Quality Metrics
Correctness82.0%
Maintainability82.6%
Architecture74.4%
Performance77.8%
AI Usage22.8%
Skills & Technologies
Programming Languages
JSXJavaScriptReact NativeTypeScript
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI SecurityBackend DevelopmentCode OrganizationCode RefactoringDependency ManagementExpo RouterExpress.jsFirebaseFirebase AuthenticationForm ValidationFront End Development
Repositories Contributed To
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