skkuding/codedang
Jan 2025 – Oct 2025
9 Months active
Languages Used
CSSHTMLJavaScriptTypeScriptgraphqltsxGraphQL
Technical Skills
Component DevelopmentFrontend DevelopmentNext.jsReactStylingUI/UX Design
Sumin Jeon
PROFILE
Sumin Jeon
Sumin Jeon developed and enhanced the skkuding/codedang platform over nine months, delivering 26 features and resolving 11 bugs. Their work focused on building robust contest management, admin tooling, and user-facing UI/UX improvements using React, TypeScript, and GraphQL. Sumin implemented API-aligned navigation, live contest previews, secure Instagram integration via AWS Secrets Manager, and role-based access control for scalable governance. They refactored admin and announcement UIs, improved error handling, and introduced reusable components to streamline workflows. By addressing both frontend stability and business logic, Sumin ensured maintainable, scalable code that improved contest fairness, admin efficiency, and the overall user experience.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
51Total
Bugs
11
Commits
51
Features
26
Lines of code
6,734
Activity Months9
Your Network
25 people
Work History
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.
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
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.
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.
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.
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
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.
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.
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.
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
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.
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.
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.
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
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.
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.
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.
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
Activity
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Quality Metrics
Correctness90.0%
Maintainability87.2%
Architecture83.8%
Performance86.4%
AI Usage22.8%
Skills & Technologies
Programming Languages
CSSGraphQLHTMLJavaScriptTypeScriptgraphqltsx
Technical Skills
API IntegrationAWS Secrets ManagerApollo ClientAuthenticationCSSComponent DevelopmentComponent StylingEnvironment VariablesError HandlingFrontend DevelopmentGraphQLHook FormNext.jsReactRole-Based Access Control
Repositories Contributed To
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