データサイエンティスト（ビジネスグロース領域）

The role

This person will develop and operate machine learning models and perform data analysis to improve user value and business growth. They will handle the entire process from theme planning and design to implementation and effect verification.

What you will do

• Plan, develop, and operate machine learning models and data analysis in the business growth area
• Build customer analysis, behavior analysis, and predictive models to deepen user understanding
• Plan and design analysis themes to improve business KPIs such as new enrollments, GMV, churn, and cross-use
• Provide analysis and proposals for marketing measures, product improvements, and new business planning
• Implement measures, verify effects, and propose improvements based on analysis results
• Promote projects in collaboration with business, marketing, and product departments

Required qualifications

• Approximately 3 or more years of practical experience in data analysis and machine learning model development using Python
• Experience in development and operation using Google Cloud (GCP)
• Experience in consistently promoting everything from analysis theme planning and design to measure proposal and effect verification based on business issues

Nice to have

• Experience in the full cycle of model development (planning to operation and improvement)
• Experience using regression, classification, or time series methods to contribute to business KPI improvement or user value enhancement
• Experience in model development using AutoML tools (DataRobot, etc.) or ML platforms
• Development and operation experience using Docker, CI/CD, etc.
• Experience in pipeline construction and operation using Vertex AI, BigQuery, and GCS
• Experience in development and operation of applications using Generative AI or AI agents
• Data analysis and modeling experience in credit card, finance, or payment domains
• Analysis experience in growth areas such as user behavior analysis, LTV improvement, CRM, or recommendation

Benefits

• Social insurance (health insurance, welfare pension, employment insurance, workers' accident compensation insurance)
• Corporate-type defined contribution pension plan
• Asset formation savings system (general, housing, pension)
• Annual paid leave (14 days in the first year, pro-rated depending on the month of joining)
• Personal leave (5 days every year, or 3 or 5 days in the first year depending on the month of joining)
• Overtime allowance
• Late-night work allowance
• Commuting transportation expenses

About the company

PayPay Card Co., Ltd. was established in 2021 to provide fintech services that are closer and more convenient for users by integrating with the PayPay payment platform, which has surpassed 75 million users as of August 2026.