Frontend Developer · Ads Platform Team

2024.02 - current

Built and enhanced Toss Ads, a self-serve advertising platform(DSP, B2B side ads platform) that empowers businesses to independently create and manage ad campaigns. • Designed and developed end-to-end features across the Toss Ads platform—serving both internal admins and external advertisers—to power ad creation, asset management, billing, and permissions at scale. • Led end-to-end UI/UX improvements across ad creation workflows, enhancing usability and reducing user errors through consistent design patterns and real-time feedback. • Launched key ad platform features—including dark mode previews and custom creative formats—that directly improved advertiser experience and engagement. • Integrated mobile attribution tools(MAT) and event tracking infrastructure, enabling precise performance measurement and optimization of ad campaigns. • Refactored legacy components and migrated core modules to scalable architectures, boosting frontend performance and maintainability for future growth. • Managed and modernized the Toss Ads marketing site with lead capture, analytics, and sales integration—streamlining the acquisition funnel for advertisers.

Frontend Developer · Benefit Silo

2022.12 - 2024.02

Developed key user engagement services(B2C side ads products), including the Benefit Tab(MAU 7M+), Step Counter, and Lucky Lottery, increasing daily user interaction and rewards participation. • Led the creation of new advertising products such as display banners and video ad formats, identifying technical bottlenecks and improving ad performance. • Collaborated across teams to iteratively refine the user experience and support monetization strategies through data-driven feedback loops.

Software Engineer · Crypto-X team

2021.08 - 2022.12

Developed a blockchain-based SNS platform (afan), integrating decentralized technology and generative AI to enhance personalized creator-fan interactions. Led the end-to-end design and development of an interactive NFT event-sharing system, increasing user engagement through a scalable web infrastructure. • aFan - SNS Platform for artist and fans using blockchain • afan Tiniverse - building metaverse platform with AI NFT & integrate on afan(SNS) service. Working as a product owner and designed overall architecture. • Ainize web renewal - frontend develop, develop a design system(using storybook) • Soul Fiction Project - Generate 15,000 NFTs(SoulLink) using Generative Art, develop event web page and participate marketing in ETHDenver2022 • Moderate dev study(clean code, programmatic programmer)

Software Engineer Intern · Maps Mobile

2021.03 - 2021.08

• Mobile-Based Personal Preference Modeling projects • Naver Maps log data with EDA (Exploration Data Analysis) • Develop a POI(Point Of Interest) recommendation model based on user click & search log

Undergraduate Research Intern

2020.09 - 2021.02

• Designing Human-AI Interaction Guidelines for Supporting Designer-Developer Communication (with Samsung Research) • Samsung Research Industry-University Cooperation Project Final Presentation Presenter

DLab(Startup Team)

Developer

2020.08 - 2020.10

A startup team started by two medical students, designer, and developers to solve the discomfort felt from the practical experience in the medical school. • Build the app for ASD(Autism Spectrum Disorder) children "mon-ami" using Java + XML + Google Firebase as a lead developer • Samsung Digital Health Hackathon 2020 Awarded Business track Grand Prize(대상)

Korea Advanced Institute of Science and Technology (KAIST)

Undergraduate Student · Computer Science

2018.03 - current

Hansung Sci. HighSchool

2015.03 - 2018.02