Dongkyu Choi
머신 러닝 엔지니어 at Viva Republica (Toss)
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolDongkyu Choi is a Seoul-based machine learning engineer with 9 years of experience building production-grade ML systems across fintech and platform companies. He designed Modelier, a feature meta management library that replaced tens of thousands of lines of SQL and helped consolidate legacy metadata into a single source of truth, and built scalable PySpark pipelines and custom deserialization to process high-volume feature data memory-efficiently. His models have driven measurable business impact—boosting home loan conversions to generate an estimated $1.3M weekly and doubling conversion rates for other key products—while also shipping targeting, income-prediction, and DSP/CTR solutions. With a background in economics and financial engineering from NYU and prior work at the Bank of Korea, he combines rigorous quantitative modeling (ASR, LSTM nowcasting, FX prediction) with hands-on engineering and product sensibility. He’s an all-time learner who routinely turns complex data and legacy stacks into reusable, developer-friendly tooling that accelerates modelers’ workflows.
9 years of coding experience
4 years of employment as a software developer
Bachelor of Applied Science (B.A.Sc.), Information Statistics; Computer Science, 4.1/4.5, Bachelor of Applied Science (B.A.Sc.), Information Statistics; Computer Science, 4.1/4.5 at 한국방송통신대학교Master's degree, Financial Engineering, 3.8/4.0, Master's degree, Financial Engineering, 3.8/4.0 at New York UniversityBachelor of Business Administration (BBA), Business, 3.6/4.3, Bachelor of Business Administration (BBA), Business, 3.6/4.3 at Yonsei University 연세대학교Bachelor's degree, Business Administration and Management, General, 3.56, Bachelor's degree, Business Administration and Management, General, 3.56 at Yonsei University
Korean, English, French, Chinese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (23)
java-stream-api10
spring10
java10
stream10
openfeign10
feign10
spring-boot10
spring-cloud9
spring-security9
api9
springframework8
javascript7
atdd7
jpa7
ipfs5
Programming languages (3)
Github contributions (5)
kakao-tech-campus-2nd-step2/spring-gift-enhancement
Jul 2024 - Jul 2024
Contributions:47 reviews, 19 PRs, 17 pushes in 6 days
MangKyu/stream-quiz
Oct 2020 - Nov 2022
Java의 Stream API 연습을 위한 레포지토리
Contributions:20 commits, 6 PRs, 15 pushes in 2 years 2 months
stream-apiapijava-stream-apistream-javastream
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