Sunghyun Cho
Hey. I am an engineer based in Seoul. I went to USC for my B.S. and M.S. in Computer Science as a Boeing Scholar, and before that I studied at Korean Minjok Leadership Academy. I've shipped products at Woowa, Karrot, and Grammarly.
I can't leave out my love for Korean history and East Asian geopolitics. Pick any stretch of Korea's 5,000 years and I feel the turbulence in it, and I love seeing where our people saved themselves and where they blew it. History doesn't repeat, but it rhymes, so better to be ready, right?
Now
- Building medical AI agents at Lunit.
- Writing my own encyclopedia, the notes you can browse right here.
Experience
AI Research Engineer, AI InnovationLunit
Jan 2026 – Present
Built a Slack AI agent and an MCP server that submit and track internal research workflow runs.
Research Engineer, AutoMLLunit
Jun 2024 – Dec 2025
Built PyTorch experiment-tracking SDKs and rebuilt the dashboard on Next.js, cutting page latency from 3–5s to under 1s and helping trim $136K/yr in GPU spend.
Software Engineer Intern, Experimentation PlatformGrammarly
May 2023 – Aug 2023
Shipped a configurable significance-threshold feature end-to-end (React, Spring Boot, Kinesis to Delta Lake), lifting powered experiments by 8 pp.
Software R&D Engineer Intern, Karrot MiniKarrot
May 2022 – Aug 2022
Prototyped a web-standards mini-app runtime (Web Workers, virtual DOM) with shims for proprietary Google APIs.
Software Engineer Intern, Woowa Tech CampWoowa
Jul 2020 – Aug 2020
Built four systems in vanilla JS and React (auth, kanban, bookkeeping, e-commerce) with OAuth, SPA routing, and ELK on AWS.
Research
ML Researcher, Vertical Federated LearningInformation Sciences Institute
Aug 2023 – May 2024
Implemented feature-partitioned CNN training for Vertical Federated Learning in PyTorch, advised by Prof. Jose-Luis Ambite.
Education
M.S. in Computer ScienceUniversity of Southern California
May 2024
Boeing Scholar, GPA 3.80 / 4.00
B.S. in Computer ScienceUniversity of Southern California
May 2023
Magna Cum Laude, GPA 3.81 / 4.00
InternationalKorean Minjok Leadership Academy
Feb 2020
First Class Honor in Macroeconomics, ACT 35/36 (US Top 1%)