Keisho O
Machine Learning Engineer at Indeed Recruit Technologies Co., Ltd.
Meguro, Japan
Summary
👤
Senior🎓
Top SchoolKeisho O is a machine learning engineer with 11 years of experience specializing in recommendation systems for job-matching platforms, currently leading a team of data scientists at Indeed Recruit Technologies after a long tenure at Recruit Co., Ltd. He blends applied ML, statistics, and data engineering to drive measurable KPI improvements, having implemented real-time ranking, batch and online recommender algorithms, and A/B testing frameworks. Keisho has hands-on experience deploying LLM-based features—building chat apps, match-quality assessment systems, and fine-tuning models with LangChain/LangGraph and vector search on AWS. Comfortable across Python, C++, Spark, Terraform, GCP and AWS, he bridges research collaborations (e.g., with Tokyo Institute of Technology) and product delivery while mentoring engineers. His background from the University of Tokyo in mathematical informatics underpins a strong theoretical grounding that informs practical, production-grade solutions. Notably, he combines leadership and individual-contributor roles, shipping both infrastructure-level ranking systems and cutting-edge LLM retrieval pipelines.
11 years of coding experience
Graduate School of Information Science and Technology, Department of Mathematical Informatics, Graduate School of Information Science and Technology, Department of Mathematical Informatics at 東京大学
Chinese, English, Japanese
Github Skills (17)
issue-tracking7
platformio4
hardware4
anaconda4
iot3
embedded3
fpga3
workbench3
vscode3
microcontroller2
ide2
verilog2
development-environment2
chrome-extension1
netflix1
Programming languages (3)
Github contributions (5)
keisho-oh/isucon7-qualify
Feb 2021 - Feb 2021
ISUCON7 予選問題の参照実装とベンチマーカー
Contributions:12 PRs, 13 pushes, 10 branches in 7 days
o-no-username/kaggle
Aug 2017 - Aug 2017
Contributions:18 pushes, 2 branches in 13 days
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