Mercari, Inc.

Growth Data Scientist

Mercari, Inc.

full-time

Posted on:

Location Type: Hybrid

Location: Minato City • Japan

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Tech Stack

BigQueryPythonPyTorchScikit-LearnSparkSQLTensorflow

About the role

  • Drive ML-Powered Interventions: Design, build, and productionize models that predict user behavior (e.g., conversion, churn, and reactivation) to estimate incentive elasticity and incremental business impact.
  • Innovate Personalization Systems: Architect the shift toward dynamic incentive control, intelligent exposure, and highly personalized targeting at scale.
  • Own Business Outcomes: Take direct responsibility for marketing and incentive ROI, incremental GMV, and LTV uplift, utilizing model performance as a powerful lever for business success rather than just an end goal.
  • End-to-End Experimentation: Actively drive the ML lifecycle from experiment design and KPI definition to post-launch analysis and continuous iteration.
  • Cross-Functional Partnership: Collaborate tightly with Growth, Marketing, and Product teams to translate complex growth opportunities into scalable, ML-driven decision frameworks.
  • Build Reusable Growth ML Foundations: Develop shared frameworks for uplift modeling, elasticity estimation, and intervention optimization to accelerate the rollout of future growth initiatives.

Requirements

  • Strong interest in growth, marketing, and direct business impact, with a willingness to explicitly own business impact.
  • Proven experience applying machine learning to real, user-facing decisions and production environments.
  • Proficiency in Python and SQL; experience with ML frameworks (e.g., scikit-learn, XGBoost, LightGBM, TensorFlow, or PyTorch)
  • Experience with large-scale data processing tools (e.g., BigQuery, Spark, or equivalent)
  • Solid understanding of statistics, experimental design, and causal reasoning
  • Familiarity with ML deployment and monitoring in production systems
  • Japanese: Preferred
  • English: Required
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
machine learningPythonSQLscikit-learnXGBoostLightGBMTensorFlowPyTorchstatisticsexperimental design
Soft Skills
growth mindsetbusiness impact ownershipcollaborationcommunicationproblem-solvinginnovationresponsibilityiterationdecision-makinganalytical thinking