Cheng Li-kai - Senior Data Scientist

Cheng Li-kai

Senior Data Scientist

Tokyo, Japan

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Summary

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Senior

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Cheng Li-kai is a Senior Data Scientist based in Tokyo with nine years of experience bridging machine learning, analytics and software engineering to deliver production-grade data services. He has led cross-functional teams to build wide-table data foundations, A/B testing and monitoring platforms, and converted rule-based systems into regression and LLM-enhanced models that improved decision-making and automation. At AnyMind and Rakuten he drove significant business impact—cutting operation time by over 50% with fine-tuned LLMs, improving forecast and classification metrics double-digit percentages, and increasing recommendation-driven revenue at scale. He combines hands-on model deployment (GCP Vertex, Kubernetes, LightGBM, YOLOv7/BERT integrations) with pragmatic cost-control of LLM usage, having reduced model costs while maintaining output quality. Known for turning experimental ML into reusable, stakeholder-facing services, he also has a background in NLU and backend engineering that helps him span research, product, and platform needs.

9 years of coding experience

3 years of employment as a software developer

Bachelor's degree, Management information system, Bachelor's degree, Management information system at National Central University

Master's degree, Information system and Application, Master's degree, Information system and Application at National Tsing Hua University

Stackoverflow

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Github Skills (4)

mining2

data-mining1

python1

data-science1

Github contributions (5)

AKAAKAIplus/Data_Structure-Arrays_N_Strings

Jun 2019 - Jun 2019

Contributions:23 commits, 22 pushes, 1 branch in 17 days

AKAAKAIplus/Credit_evaluation_esun_hackathon

Jan 2018 - Jun 2019

Contributions:1 push, 1 branch in 1 year 4 months

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