O2ARC 3.0

2024. 01 – 2024. 05

Developed O2ARC 3.0 to collect human solving data for ARC (AI reasoning benchmark). Approached it like a startup product, significantly increasing data collection volume.

• Migrated the system from JQuery to React

• Improved grid manipulation UX, increasing object action usage (suitable for AI training) from almost non-existent to over 7 times per problem

• Introduced gamification, events, and targeted ads to encourage users to solve problems voluntarily. Increased data collection speed from 2,000 in 6 months to 10,000 in 3 months

• Published a paper as a co-first author at IJCAI 2024

• Technologies: React, TypeScript, i18next, NestJS, Prisma

Introductory RL Study

2024. 01 – 2024. 02

Studied the basics of reinforcement learning through Coursera's Reinforcement Learning Specialization.

• Studied the basics of reinforcement learning (– Q-Learning)

Doggly Frontend

2022. 08 – 2023. 03

Developed the frontend for Doggly (with over 2000 users), a shopping mall that measures dog sizes using AI and recommends fitting clothes.

• Developed most of the frontend for the shopping mall, seller page, and admin page; worked on responsiveness and multilingual support; and handled maintenance

• Developed the PWA & Jetpack Compose & SwiftUI WebView app and integrated the payment module

• Introduced logging for error post-processing, enabling contact with users within 30 minutes in case of payment errors

• Increased user conversion rate (product view) by over 40% through UI A/B testing over a month

• Technologies: React, TypeScript, Styled-components, Jetpack Compose, SwiftUI, i18next, PWA

Rush Hour

2023. 05 – 2023. 12

Developed the frontend/app/ML for Rush Hour, a service that informs users about subway congestion and available seats.

• Developed the initial version with React and WebView, then migrated to Flutter

• Logged all user actions using GA, Amplitude, Smartlook, and a custom logging system

• Developed AI to predict congestion levels at each station and time zone using subway congestion data

• Technologies: React, TypeScript, Jetpack Compose, SwiftUI, Flutter, Firebase

2022. 02 – 2023. 12

As a developer at a startup, I focused on automating planners' tasks and improving developers' productivity. As a member of the early startup team, I handled various tasks including booth operations at expos and pet fairs, user interviews, and meetings with partners.

• Improved CI/CD speed (from 3 minutes to 1 minute) by introducing zero install and Vite

• Developed a web-based analytics tool focused only on the features needed for Rush Hour in response to feedback that Amplitude was difficult to use. Provided user flow, funnel, and retention analysis functionalities

• Automated repetitive tasks of planners such as product approval and log extraction

• Integrated mono-repo with Yarn Workspaces to enhance frontend reusability

• Technologies: React, TypeScript, Amplitude, AWS Lightsail, AWS Lambda, Docker, FastAPI, Pandas, mono-repo

Ziggle Frontend

2023. 04 – 2025. 02

Serving as team lead and developing the frontend for Ziggle, GIST's integrated notification platform.

• Developed the initial version with React and migrated to Next.js

• Introduced various technologies including GraphQL and Apollo Client

• Maintained a DAU of 200 users, representing 25% of the undergraduate population

• Technologies: React, TypeScript, Next.js, Tailwind CSS

2022. 09 – Now

Focused on improving the frontend technical level within the team.

• Introduced i18n for multilingual support

• Adopted the Atomic pattern and documented with Storybook

• Automated E2E testing using Playwright

IdP Frontend

2024. 03 – 2024. 12

Maintaining the frontend of the IdP, the OAuth2.0 authentication system used at GIST.

• Frontend maintenance

• Technologies: React, TypeScript, Tailwind CSS

2023. 03 – 2024. 12

Conducting development knowledge exchange and sessions at Wing.

• Led a session on introducing mono-repo

• Led a session on React.cpp

• Led a session on writing code like a UI library: Compound Components

2022. 11 – 2023. 05

Led the frontend study in the internal development study at GDSC. Created and conducted the overall curriculum. Also participated in the JS Pattern study, where I studied design patterns and applied them to a side project that created a C++ based React.

• Frontend study lead

• Participated in JS Pattern study

GIST Mini Solution Challenge

2023. 04 – 2023. 04

A hackathon organized by GDSC-GIST within GIST. A total of 60 people participated.

• Hackathon preparation & accounting

2023. 07 – 2023. 08

Conducted C language education for the members.

• Conducted C language education

• Technologies: C

2023. 07 – 2023. 11

Attempted to develop rocket communication, but it was not successful.

• Developed flight software

• Developed communication system

• Technologies: C, Zigbee