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Senior Data Science / Machine Learning Engineer (Applied Insights)

relocate.me • Japan
Visa Sponsorship Relocation
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AI Summary

Lead the end-to-end design and deployment of machine learning models to power PayPay's fintech products. Drive product improvements through scientific analysis of user and merchant behavior and architectural decisions for DS systems. Requires 5+ years of experience in data science or ML engineering with proficiency in Python and SQL.

Key Highlights
Owns the full ML lifecycle from problem framing to production for prediction, recommendation, and anti-fraud systems.
Influences product strategy by providing data-driven insights to technical and business divisions.
Works within a diverse, global engineering organization in a high-growth fintech environment.
Key Responsibilities
Own end-to-end design, implementation, evaluation, and maintenance of machine learning models for prediction, recommendation, and anti-fraud.
Lead architectural decisions for data science systems.
Process, analyze, and visualize user and merchant data to provide insights that influence product strategy.
Collaborate with data engineers, product managers, and stakeholders to build robust production systems.

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Technical Skills Required
Python SQL
Benefits & Perks
Social Insurance (health, employee pension, employment, and compensation)
401K
Translation/Interpretation support
VISA sponsorship
Relocation support
Super Flex Time (No Core Time)
Paid leave (Annual and Personal)

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Nice to Have
Masters or PhD in a quantitative field
More than seven years of experience as a data scientist or ML engineer
Experience with Big Data technologies (BigQuery, Spark, Hadoop, AWS Redshift, Kafka, Kinesis)
Experience with recommendation systems, deep learning, NLP, optimization, or anti-fraud systems
Experience with AWS services (Glue, SageMaker, Athena, S3)
Experience with Databricks or Snowflake
Experience designing and conducting A/B and hypothesis tests
Experience building and maintaining microservices
Verbal and written communication skills in Japanese

Job Description

Senior Data Science Engineer / Senior Machine Learning Engineer (Applied Insights)Tokyo, JapanPayPayAdvanced relocation packageAdaptation tipsFlight ticketLanguage coursesMoney for moving expensesTemporary housingHousing search assistanceVisa services📩 Get the premium jobs newsletter~100 relocation-friendly tech jobs every Thursday ($15/mo)GetPayPay, a FinTech company that has achieved more than 75M (as of August 2026) since its launch in 2018, is rapidly expanding its business scale as a payment platform used by approximately one out of every two smartphone users in Japan.
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Job Overview
Posted Date Oct 15, 2026
Employment Type Full-time
Experience Level Not Applicable
Location Japan
Category Data Science
Company relocate.me
Mentioned Skills
python s3 aws microservices kafka deep learning sql big data hadoop spark machine learning payroll

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