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Senior Data Scientist, Business Data Solution Group - Business Support Development Department (BSD)

Tokyo, Japan💼 Full-time🗓 2026-07-10 → 2026-07-30

Core

Develop and operate AI solutions and data platforms for Rakuten Ichiba's fraud detection and business growth using machine learning and generative AI.

Role type

Senior Data Scientist (Fraud Detection & AI Solutions)

Builds

AI solutions for fraud detection, predictive analysis, and automated customer behavior analysis

Domain

E-commerce, Financial Services, Fraud Detection

Deliverable

production ML models

Required skills

Machine learning (including deep learning), Generative AI, Python (data science libraries), SQL, Statistics, Model evaluation and tuning, Business problem definition, Data strategy planning

Preferred skills

Fraud detection experience, Consulting experience, E-commerce industry experience, Causal inference, ML platform development, BI tools (Tableau)

Technologies

Python, SQL, Generative AI, Machine Learning frameworks

Responsibilities

Define data strategies to solve business problems, Design and test experimental plans for AI solutions, Fine-tune ML and generative AI models, Present analysis results to stakeholders, Monitor and improve released solutions

Seniority

Senior, hands-on IC

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