skkuding/codedang
Jan 2025 – Mar 2026
14 Months active
Languages Used
CSSHTMLJavaScriptTypeScriptgraphqltsxGraphQL
Technical Skills
Component DevelopmentFrontend DevelopmentNext.jsReactStylingUI/UX Design
Sumin Jeon
PROFILE
Sumin Jeon
Sumin Jeon developed and maintained the skkuding/codedang repository over 14 months, delivering 30 features and resolving 15 bugs to enhance contest management and user experience. She engineered robust frontend solutions using React, Next.js, and TypeScript, focusing on scalable UI components, real-time analytics dashboards, and secure API integrations. Her work included mobile-first redesigns, admin tools for contest governance, and integration of AWS Secrets Manager for secure social content delivery. By aligning UI with Figma designs and implementing state management with Zustand, Sumin improved usability, reliability, and maintainability. Her disciplined, issue-driven workflow ensured stable deployments and clear traceability throughout development.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
61Total
Bugs
15
Commits
61
Features
30
Lines of code
9,170
Activity Months14
Your Network
25 peopleWork History
March 2026
1 Commits
Mar 1, 2026March 2026 monthly summary for skkuding/codedang: Delivered a targeted bug fix to ensure reliable image saving in production by refactoring the Next.js image saving logic and simplifying remote pattern handling in next.config.ts. The change removes an unnecessary conditional and stabilizes image delivery for production environments, reducing risk of broken image saves during uploads and content processing.
1 Commits
Mar 1, 2026March 2026 monthly summary for skkuding/codedang: Delivered a targeted bug fix to ensure reliable image saving in production by refactoring the Next.js image saving logic and simplifying remote pattern handling in next.config.ts. The change removes an unnecessary conditional and stabilizes image delivery for production environments, reducing risk of broken image saves during uploads and content processing.
March 2026
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for skkuding/codedang focused on delivering a data-driven contest analytics experience and stabilizing new features. Implemented a real-time Contest Statistics Dashboard with leaderboard and analytics, along with UI and URL improvements to the statistics pages. The work emphasizes business value: increased engagement through real-time visibility and better problem/user insights, with attention to UX and API reliability.
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for skkuding/codedang focused on delivering a data-driven contest analytics experience and stabilizing new features. Implemented a real-time Contest Statistics Dashboard with leaderboard and analytics, along with UI and URL improvements to the statistics pages. The work emphasizes business value: increased engagement through real-time visibility and better problem/user insights, with attention to UX and API reliability.
January 2026
1 Commits • 1 Features
Jan 1, 2026This month focused on delivering a frontend feature for the codedang repository: Mobile Problem Cards UI Redesign with mobile navigation enhancements. The redesign updates the mobile problem cards and introduces navigation buttons to improve mobile UX, aligned with design guidelines and user feedback. The change is implemented in commit 62d3e3ef2253e0e5f85798297bd847fda1b2ef0b, referenced in the PR notes and closes tas-2445. No major bugs fixed in this scope. Impact includes improved mobile usability, quicker access to problems, and smoother navigation, enabling higher engagement and task completion on mobile devices. Technologies demonstrated include frontend feature development, mobile-first UI considerations, component-driven design, and disciplined release process with clear commit messages and traceability to issues, and adherence to PR/Contributing guidelines.
1 Commits • 1 Features
Jan 1, 2026This month focused on delivering a frontend feature for the codedang repository: Mobile Problem Cards UI Redesign with mobile navigation enhancements. The redesign updates the mobile problem cards and introduces navigation buttons to improve mobile UX, aligned with design guidelines and user feedback. The change is implemented in commit 62d3e3ef2253e0e5f85798297bd847fda1b2ef0b, referenced in the PR notes and closes tas-2445. No major bugs fixed in this scope. Impact includes improved mobile usability, quicker access to problems, and smoother navigation, enabling higher engagement and task completion on mobile devices. Technologies demonstrated include frontend feature development, mobile-first UI considerations, component-driven design, and disciplined release process with clear commit messages and traceability to issues, and adherence to PR/Contributing guidelines.
January 2026
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for skkuding/codedang. Focused on security hardening and analytics UX improvements. Key deliveries include a security patch upgrading Next.js to 15.4.10 to address vulnerabilities, and a new tabbed Statistics page interface enabling Real-Time Leaderboard, Problem Statistics, and User Analysis. These changes improve security posture, streamline navigation, and enable data-driven insights while maintaining stable deployments.
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for skkuding/codedang. Focused on security hardening and analytics UX improvements. Key deliveries include a security patch upgrading Next.js to 15.4.10 to address vulnerabilities, and a new tabbed Statistics page interface enabling Real-Time Leaderboard, Problem Statistics, and User Analysis. These changes improve security posture, streamline navigation, and enable data-driven insights while maintaining stable deployments.
November 2025
4 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for skkuding/codedang: Focused on reliability, stability, and deployment consistency. Delivered critical bug fixes to ensure data accuracy, implemented social/image hosting optimizations with caching and environment-aware configurations, and hardened user-facing previews. The work reduced data inconsistencies, stabilized media delivery, and improved developer experience through clearer commit-driven changes and robust error handling.
4 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for skkuding/codedang: Focused on reliability, stability, and deployment consistency. Delivered critical bug fixes to ensure data accuracy, implemented social/image hosting optimizations with caching and environment-aware configurations, and hardened user-facing previews. The work reduced data inconsistencies, stabilized media delivery, and improved developer experience through clearer commit-driven changes and robust error handling.
November 2025
October 2025
4 Commits • 2 Features
Oct 1, 2025October 2025 performance highlights for skkuding/codedang: Implemented admin Q&A management with a reusable DataTable (filters, search, toggle, per-question detail modal, unread indicators). Aligned pagination visuals to Figma by updating Tailwind-based styles. Fixed problem visibility toggle to respect the API policy and removed deprecated logic that could misreport visibility. Enhanced leaderboard robustness with a dedicated LeaderboardError component, refined messaging for not-started, no-data, and network scenarios, and removed ChannelIO integration. These changes streamline admin workflows, improve UI consistency, and reduce support overhead. Under the hood, the work emphasized reusable components, clear error handling, API-driven behavior, and design-aligned UI.
October 2025
4 Commits • 2 Features
Oct 1, 2025October 2025 performance highlights for skkuding/codedang: Implemented admin Q&A management with a reusable DataTable (filters, search, toggle, per-question detail modal, unread indicators). Aligned pagination visuals to Figma by updating Tailwind-based styles. Fixed problem visibility toggle to respect the API policy and removed deprecated logic that could misreport visibility. Enhanced leaderboard robustness with a dedicated LeaderboardError component, refined messaging for not-started, no-data, and network scenarios, and removed ChannelIO integration. These changes streamline admin workflows, improve UI consistency, and reduce support overhead. Under the hood, the work emphasized reusable components, clear error handling, API-driven behavior, and design-aligned UI.
September 2025
3 Commits • 2 Features
Sep 1, 2025Month: 2025-09. Focused on delivering UI improvements and validation in the skkuding/codedang repo, with measurable business impact: improved UX feedback, corrected navigation, and prevention of illogical scheduling.
3 Commits • 2 Features
Sep 1, 2025Month: 2025-09. Focused on delivering UI improvements and validation in the skkuding/codedang repo, with measurable business impact: improved UX feedback, corrected navigation, and prevention of illogical scheduling.
September 2025
August 2025
10 Commits • 5 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for skkuding/codedang: Delivered a set of high-impact features to streamline contest creation, enhance in-contest collaboration, and secure social content. Key outcomes include a live Contest Preview for Create/Edit, an in-editor Q&A with staff moderation, Instagram content integration via a secure API using AWS Secrets Manager, and UI/UX refinements for modals and the code editor. Also addressed Tailwind CSS upgrade regressions to restore visuals and implemented a safer code editor experience with a language-change confirmation and a shared reset modal. A critical bug fix corrected the registration deadline display, ensuring accurate remaining time or closed status. These efforts improved contest setup speed, user collaboration, security posture, and overall UI reliability.
August 2025
10 Commits • 5 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for skkuding/codedang: Delivered a set of high-impact features to streamline contest creation, enhance in-contest collaboration, and secure social content. Key outcomes include a live Contest Preview for Create/Edit, an in-editor Q&A with staff moderation, Instagram content integration via a secure API using AWS Secrets Manager, and UI/UX refinements for modals and the code editor. Also addressed Tailwind CSS upgrade regressions to restore visuals and implemented a safer code editor experience with a language-change confirmation and a shared reset modal. A critical bug fix corrected the registration deadline display, ensuring accurate remaining time or closed status. These efforts improved contest setup speed, user collaboration, security posture, and overall UI reliability.
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary for the skkuding/codedang repository. Focused on stabilizing the frontend experience by introducing placeholder components to prevent runtime crashes and to support ongoing feature work. The change reduces crash risk during initial renders and navigation, enabling safer iterative development and faster QA cycles.
1 Commits
Jul 1, 2025July 2025 monthly summary for the skkuding/codedang repository. Focused on stabilizing the frontend experience by introducing placeholder components to prevent runtime crashes and to support ongoing feature work. The change reduces crash risk during initial renders and navigation, enabling safer iterative development and faster QA cycles.
July 2025
May 2025
8 Commits • 6 Features
May 1, 2025May 2025 (2025-05) monthly summary for skkuding/codedang: Delivered six major feature improvements across the platform, focused on fairness in competition, admin UI enhancements, and data integrity. Implementations include: Leaderboard Ranking Criteria Clarification to use earliest last accepted submission for tie-breaks; Announcement Management UI Overhaul with separate creation/history and GraphQL integration; Reset Testcase Score Ratio to safely reset weights; Contest Problem Visibility and UI Improvements with default open problem list, visibility toggle for admins, and simplified permissions; Assignment Assessment UI Improvements removing raw score and renaming final score to total; UI/UX refinements in WhitespaceVisualizer and DataTable navigation with improved null handling and router-based navigation. These changes improve transparency, reduce admin overhead, and enhance the end-user experience, aligning with business goals of fair competition, maintainability, and scalable UI architecture.
May 2025
8 Commits • 6 Features
May 1, 2025May 2025 (2025-05) monthly summary for skkuding/codedang: Delivered six major feature improvements across the platform, focused on fairness in competition, admin UI enhancements, and data integrity. Implementations include: Leaderboard Ranking Criteria Clarification to use earliest last accepted submission for tie-breaks; Announcement Management UI Overhaul with separate creation/history and GraphQL integration; Reset Testcase Score Ratio to safely reset weights; Contest Problem Visibility and UI Improvements with default open problem list, visibility toggle for admins, and simplified permissions; Assignment Assessment UI Improvements removing raw score and renaming final score to total; UI/UX refinements in WhitespaceVisualizer and DataTable navigation with improved null handling and router-based navigation. These changes improve transparency, reduce admin overhead, and enhance the end-user experience, aligning with business goals of fair competition, maintainability, and scalable UI architecture.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 — skkuding/codedang: Focused feature delivery to strengthen contest governance and admin control. Delivered GraphQL-backed contest management enhancements, reinforced authentication and RBAC for contest-related workflows, and extended admin capabilities with UI controls and mutations to manage permissions for creating courses and contests. This work enables admins to securely configure contest participants and course creation rights, reducing manual admin overhead and enabling scalable governance for contest programs.
3 Commits • 1 Features
Apr 1, 2025April 2025 — skkuding/codedang: Focused feature delivery to strengthen contest governance and admin control. Delivered GraphQL-backed contest management enhancements, reinforced authentication and RBAC for contest-related workflows, and extended admin capabilities with UI controls and mutations to manage permissions for creating courses and contests. This work enables admins to securely configure contest participants and course creation rights, reducing manual admin overhead and enabling scalable governance for contest programs.
April 2025
March 2025
13 Commits • 5 Features
Mar 1, 2025March 2025 (2025-03) - Delivered API-aligned contest features, UX improvements, and performance polish in skkuding/codedang. Key outcomes include API-consistent contest data (Prev/Next navigation, summary, announcements), registration button visibility for upcoming contests with simplified login flow, admin UI overhaul, and navigation/detail improvements for submissions. Visual polish, better performance, and stability fixes reduce user friction and support load. Data mappings prepared to ensure accurate contest display; deprecated features removed to minimize technical debt.
March 2025
13 Commits • 5 Features
Mar 1, 2025March 2025 (2025-03) - Delivered API-aligned contest features, UX improvements, and performance polish in skkuding/codedang. Key outcomes include API-consistent contest data (Prev/Next navigation, summary, announcements), registration button visibility for upcoming contests with simplified login flow, admin UI overhaul, and navigation/detail improvements for submissions. Visual polish, better performance, and stability fixes reduce user friction and support load. Data mappings prepared to ensure accurate contest display; deprecated features removed to minimize technical debt.
February 2025
7 Commits • 4 Features
Feb 1, 2025February 2025 (skkuding/codedang) delivered a focused set of frontend enhancements across contest UX, navigation, and UI polish, with targeted cleanup to improve information clarity. The work emphasizes business value through easier contest browsing, clearer presentation of announcements, and a refreshed visual identity across contest-related pages while maintaining a stable, maintainable codebase.
7 Commits • 4 Features
Feb 1, 2025February 2025 (skkuding/codedang) delivered a focused set of frontend enhancements across contest UX, navigation, and UI polish, with targeted cleanup to improve information clarity. The work emphasizes business value through easier contest browsing, clearer presentation of announcements, and a refreshed visual identity across contest-related pages while maintaining a stable, maintainable codebase.
February 2025
January 2025
2 Commits • 1 Features
Jan 1, 2025Concise monthly summary focused on delivering a streamlined contest experience and clearer information presentation for skkuding/codedang in January 2025.
January 2025
2 Commits • 1 Features
Jan 1, 2025Concise monthly summary focused on delivering a streamlined contest experience and clearer information presentation for skkuding/codedang in January 2025.
Activity
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Quality Metrics
Correctness89.6%
Maintainability86.4%
Architecture83.4%
Performance85.8%
AI Usage24.2%
Skills & Technologies
Programming Languages
CSSGraphQLHTMLJavaScriptTypeScriptgraphqltsx
Technical Skills
API IntegrationAPI integrationAWSAWS Secrets ManagerApollo ClientAuthenticationCSSComponent DevelopmentComponent StylingEnvironment VariablesError HandlingFrontend DevelopmentGraphQLHook FormNext.js
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline