Youngin Cho

KRAFTON · Research Scientist

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Email: [email protected]

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[GitHub]

About Me

I obtained Bachelor’s degrees in Computer Science and Mathematics from Korea Advanced Institute of Science and Technology (KAIST). Subsequently, I earned a Master’s degree in Artificial Intelligence at KAIST under the guidance of Jaegul Choo. I am interested in various machine learning algorithms, including recommendation systems and vision, as well as the engineering technologies required to apply them to real-world services.

Work Experience

KRAFTON — Deep Learning Division · Research Scientist (Feb. 2025 - Present)

NCSOFT — NC Research · Research Engineer (Mar. 2023 - Jan. 2025)

  • Mobile game recommendation system
    • Developed custom bandit algorithms to enhance the purchase of package items in a mobile game.
    • Designed and implemented machine learning pipelines for training and inference.
    • Built simulators and A/B testing tools for model evaluation and conducted on/offline tests.
    • Demonstrated via focus group test that the proposed model outperformed the popularity-based model by 11.4% in purchase volume.
    • Related Skills: Spark, FastAPI, Airflow, Python
  • Coding assistant tools using large language models
    • Developed and deployed an LLM server and copilot-like IDE extensions to enhance team productivity while preventing code leaks.
    • Implemented a code interpreter feature utilizing open-source LLMs for real-time code execution and analysis within a conversational interface.
    • Related Skills: React, FastAPI, vLLM, PyTorch, TypeScript, Python

Kakao Corp. — Recommendation Team · Internship (Dec. 2018 - Feb. 2019)

  • Piccoma webtoon recommendation system
    • Improved preprocessing of comic descriptions and tag text used in content-based filtering algorithms.
    • Designed and implemented deep-learning-based contextual bandit algorithms.
    • Related Skills: MongoDB, RocksDB, Elasticsearch, Apache Kafka, TensorFlow, Python

Education

  • Korea Advanced Institute of Science and Technology (KAIST)
    • Master’s degree in Artificial Intelligence (Feb. 2021 - Feb. 2023)
    • Bachelor’s degree in Computer Science (Feb. 2017 - Feb. 2021)
    • Bachelor’s degree in Mathematics (double major) (Feb. 2017 - Feb. 2021)

Awards & Certifications

  • NeurIPS 2022 Scholar Award travel grant (Oct. 8, 2022)
  • Advanced to ICPC World Finals Moscow Invitational Contest (Sep. 30, 2021)
  • 2019 ACM-ICPC Seoul regional 3rd place (Nov. 9, 2019)
  • 2018 ACM-ICPC Jakarta regional silver (Nov. 12, 2018)
  • 2018 ACM-ICPC Seoul regional 5th place (Nov. 3, 2018)
  • 2018 ACM-ICPC KAIST competition gold (Oct. 6, 2018)
  • 2018 KAKAO code festival 4th place (Aug. 25, 2018)
  • 2018 Samsung Collegiate Programming Cup 5th place (Jul. 31, 2018)
  • 2017 ACM-ICPC Daejeon regional 5th place (Nov. 11, 2017)
  • 2017 KAKAO code festival 5th place (Sep. 9, 2017)

For the full list of publications, see the Publications page.