- CurrentAbyss CEO and Lead Developer
- Former Naver Developer
- 5th-year algorithm instructor (Produced successful candidates for Naver / Kakao / LINE / Samsung coding tests)
- 2019, 2020 Major IT Company Coding Test Passer (All Solved)
- Top 0.1% on Baekjoon Online Judge
- 2024 Meta Hacker Cup Algorithm Competition R1 Top 12%
- JavaScript testing framework Mocha.js contributor
- Author of 《 CS Fundamentals for Interviews 》 2022 / #1 Bestselling IT book in Korea
- Author of 《 Mastering MEVN by Building a Real-Time Monitoring System 》 2021 / Ranked 63rd Best Seller in Domestic IT Books
- Blog/ YouTube