CAUCSE/CAUSW_backend
Apr 2026 – May 2026
2 Months active
Languages Used
Java
Technical Skills
API developmentSpringbackend developmentJavaRedisSpring Framework
jiyo
PROFILE
Jiyo
Over two months, contributed backend features to the CAUCSE/CAUSW_backend repository, focusing on operational visibility and secure account management. Developed an admin API for daily signup statistics, refactoring service and controller layers to improve maintainability and code quality. Enhanced user lifecycle processes by implementing robust withdrawal, expulsion, and data cleanup flows, including FCM token deletion, social account unlinking, and batch anonymization to strengthen data privacy. Improved authentication and token management with Redis-backed refresh token indexing and platform-specific login flows. Leveraged Java, Spring Boot, and Redis, emphasizing scalable architecture, error handling, and comprehensive unit testing to ensure reliable, privacy-compliant operations.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
8Total
Bugs
0
Commits
8
Features
3
Lines of code
2,429
Activity Months2
Your Network
23 peopleWork History
May 2026
7 Commits • 2 Features
May 1, 2026CAUSW_backend May 2026: End-to-end account lifecycle cleanup and authentication/token management enhancements delivering privacy-first data handling, improved security, and scalable operations. Key outcomes span two feature streams: (1) User Withdrawal/Expulsion/Data Cleanup, including FCM token deletion, social account unlink/revoke, soft deletes, blocking re-registration after expulsion, profile image cleanup, and batch anonymization; (2) Authentication/Token Management Enhancements, including Apple login flow improvements, platform hint support for withdrawal API, refresh token delivery via HTTP header, and Redis-backed refresh token indexing with bulk invalidation. Major bugs fixed include robust FCM token cleanup during withdrawal/expulsion, resolution of FCM token initialization NPEs, and Redis indexing migration/timing issues, along with hardening of external OAuth revocation paths. These fixes reduce data leakage risk and improve lifecycle reliability. Overall impact: stronger data privacy compliance, reduced risk of re-registration after expulsion, faster and more reliable account cleanup, and a scalable token management surface able to support per-user revocation and migrations. Technologies/skills demonstrated: Java/Spring Boot-based backend with batch processing and domain writer pattern; Redis for refresh token management and indexing; platform-specific auth flows (Apple, Kakao); improved error handling, custom exceptions, tests, and Flyway migrations for data integrity.
7 Commits • 2 Features
May 1, 2026CAUSW_backend May 2026: End-to-end account lifecycle cleanup and authentication/token management enhancements delivering privacy-first data handling, improved security, and scalable operations. Key outcomes span two feature streams: (1) User Withdrawal/Expulsion/Data Cleanup, including FCM token deletion, social account unlink/revoke, soft deletes, blocking re-registration after expulsion, profile image cleanup, and batch anonymization; (2) Authentication/Token Management Enhancements, including Apple login flow improvements, platform hint support for withdrawal API, refresh token delivery via HTTP header, and Redis-backed refresh token indexing with bulk invalidation. Major bugs fixed include robust FCM token cleanup during withdrawal/expulsion, resolution of FCM token initialization NPEs, and Redis indexing migration/timing issues, along with hardening of external OAuth revocation paths. These fixes reduce data leakage risk and improve lifecycle reliability. Overall impact: stronger data privacy compliance, reduced risk of re-registration after expulsion, faster and more reliable account cleanup, and a scalable token management surface able to support per-user revocation and migrations. Technologies/skills demonstrated: Java/Spring Boot-based backend with batch processing and domain writer pattern; Redis for refresh token management and indexing; platform-specific auth flows (Apple, Kakao); improved error handling, custom exceptions, tests, and Flyway migrations for data integrity.
May 2026
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026: Delivered an admin-focused API for daily signup statistics in CAUSW_backend, enabling administrators to retrieve daily new user counts. Implemented service and data access layers, added a dedicated Admin API endpoint, and performed targeted refactors to improve API routing, dependency structure, and code quality. No major bugs fixed this month; effort centered on feature delivery and codebase health. Result: improved operational visibility, faster reporting, and a cleaner, more maintainable backend.
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026: Delivered an admin-focused API for daily signup statistics in CAUSW_backend, enabling administrators to retrieve daily new user counts. Implemented service and data access layers, added a dedicated Admin API endpoint, and performed targeted refactors to improve API routing, dependency structure, and code quality. No major bugs fixed this month; effort centered on feature delivery and codebase health. Result: improved operational visibility, faster reporting, and a cleaner, more maintainable backend.
Activity
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Quality Metrics
Correctness85.0%
Maintainability77.6%
Architecture80.0%
Performance77.6%
AI Usage37.6%
Skills & Technologies
Programming Languages
Java
Technical Skills
API developmentJavaRedisSpringSpring Frameworkbackend developmentdatabase managementevent-driven architectureunit testing
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