M

Mercari

Peer-to-peer mobile marketplace for secondhand goods

Trust & Safety Abuse Investigator

Risk & ComplianceConfirmed live in the last 24 hours
Full-timeMinato City, Tokyo, JapanNo salary listed

About the Job

Requirements

  • At least 3 years of practical experience in Trust & Safety, fraud prevention, or risk operations.
  • Skill in data extraction and analysis using SQL or generative AI.
  • Experience leading improvement initiatives from data-based problem definition through execution.
  • Ability to drive projects involving multiple departments.
  • Japanese proficiency at CEFR C1 level is required.

Responsibilities

  • Analyze complex data and logs based on user reports and system alerts to identify malicious behavior and organized fraud patterns.
  • Use manual and AI-assisted investigation findings to develop automated detection and scalable rules, then provide feedback to product teams to prevent incidents.
  • Rapidly triage and make decisions on severe policy violations and cases requiring reports to law enforcement, such as the police.
  • Analyze root causes of complaints and operational incidents, identify underlying issues in service design and user interface/user experience, and pursue corrective actions.
  • Collaborate across product and risk-management departments and use knowledge of applicable laws and regulations to lead solutions.
  • Use data and AI technology to analyze user behavior and intent and develop countermeasures.

Desired Qualifications

  • Customer-support experience in e-commerce.
  • Experience creating internal policies.
  • Experience leading projects involving multiple teams.
  • Risk-management experience.
  • English proficiency at CEFR A2 level is preferred.

About the Company

cb

Mercari

Peer-to-peer mobile marketplace for secondhand goods

Mercari operates a mobile peer-to-peer marketplace for buying and selling secondhand goods. Users list items by taking photos in the app, and buyers complete purchases there, with payments held in escrow until receipt is confirmed. Revenue comes from seller fees (10% in Japan; 10% plus 3.6% buyer protection in the US), plus Merpay payments and promoted listings, plus shipping partnerships for integrated delivery. The platform differentiates itself through a simple mobile experience, escrow and buyer protection, shipping integration, and a broader marketplace including Mercari Shops for sellers, with a goal of extending product life and supporting a circular economy.

Company size
1,001-5,000
Company stage
IPO
Headquarters
Tokyo, Japan
Founded
2013

Recently Posted Jobs

Explore more opportunities at Mercari

See more jobs