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Mercari

Peer-to-peer mobile marketplace for secondhand goods

Corporate Application Engineer

Enterprise ApplicationsConfirmed live in the last 24 hours
Full-timeMinato City, Tokyo, JapanNo salary listed

About the Job

Requirements

  • Practical experience with business systems in contract management, procurement management, budget management, or application workflows.
  • End-to-end practical experience with business systems, independently handling requirements definition, design, configuration, development, testing, and release based on business requirements.
  • Implementation experience with SaaS platforms, including ServiceNow implementation; low-code development with AppEngine tools such as Flow Designer and Catalog Item; and design, configuration, and tuning using ACL, Business Rule, and Script.
  • Detailed design or implementation experience with API and system integrations.
  • Experience advancing projects at the implementation level while collaborating with business departments, IT, and vendors.
  • Practical experience with development practices such as CI/CD, test automation, or Infrastructure as Code.
  • Experience using AI agents or large language models for business automation or tool development.
  • Japanese proficiency at CEFR C1 is required.

Responsibilities

  • Drive DX projects in contract, procurement, and budgeting domains.
  • Work with legal, finance, and procurement teams to define business requirements.
  • Design business processes and approval flows based on operational and control requirements.
  • Design, configure, and develop Corporate SaaS, primarily using ServiceNow.
  • Develop low-code solutions using AppEngine, including Flow Designer and Catalog Item.
  • Design and tune ACL, Business Rule, Script, and UI Policy components.
  • Make configuration and implementation decisions based on Fit to Standard and out-of-the-box principles.
  • Design and implement integrations with Workday, accounting systems, and other Corporate SaaS platforms.
  • Design and implement API, data, and event integrations in detail.
  • Enable business processes using master data such as people, organization, and cost centers.
  • Design and configure systems to meet internal control, audit, and security requirements.
  • Design access permissions, change management, and configurations with operations in mind.

Desired Qualifications

  • Experience with ServiceNow domains such as CLM, S2P, ITSM, SAM, HAM, or CMDB.
  • Experience implementing or integrating Workday, ERP, or accounting systems.
  • Experience designing access permissions, roles, audit logs, or least-privilege IAM.
  • Experience designing or operating systems with internal controls such as J-SOX, ISMS, or SOC 2 in mind.
  • Experience making architecture and technology-selection decisions with trade-offs in mind, and applying API design approaches such as REST, gRPC, and GraphQL appropriately.
  • Experience with database design, index design, and query tuning, including identifying and resolving N+1 problems.
  • Experience diagnosing performance degradation and incidents, and tuning performance using logs, metrics, and traces.
  • Experience designing reliability and fault tolerance in distributed systems, including caching strategies, retries, and circuit breakers.
  • Experience building DX or business systems with implementation responsibility at an SIer or operating company.
  • English proficiency at CEFR B2 is preferred.

About the Company

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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

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