Mercari, Inc.

Full-stack Engineer

• Design, develop, and maintain scalable full-stack web applications using modern frontend and backend technologies.
• Architect complex user interfaces with React/Next.js and design robust backend systems and APIs.
• Write comprehensive unit, integration, and E2E tests for both frontend and backend components.
• Lead technical planning, conduct code reviews, and ensure adherence to high standards for performance and security.
• Guide junior engineers, fostering their growth through technical leadership and collaborative problem-solving.
• Improve application performance on the client side and optimize database queries and server-side logic on the backend.
• Integrate AI-powered development tools into the workflow to increase team productivity and code quality.

Software Engineer – Fullstack

Human Resources

• 組織変革や事業変化に伴う従業員のコンディション・働き方課題を早期に察知し、予防的な支援施策を設計・実行する
• 労務・休復職・パフォーマンス課題などのセンシティブな案件に対し、HRBP・マネージャー・CoE・産業医等と連携しながら対応方針の設計と実行を担う
• 個別支援や案件対応から得られた示唆をもとに、課題の構造化、業務プロセスの標準化、ナレッジ連携、制度運用改善を推進する
• データや現場インサイトを活用し、再発防止と組織運営の高度化につながる改善施策を企画・実行する

HR Business Partner

Backend Engineer

• Design, development, and operation of APIs using Go, Java or PHP
• Improving services and measuring effectiveness using quantitative and qualitative analysis on user behavior logs, etc.
• Design architecture and select middleware based on application requirements
• Microservice performance tuning, monitoring, and alert handling
• Working with PMs on a series of development tasks (plan, design, implementation, QA, release, etc.)
• Investigating inquiries from customer support or other development teams
• Conducting system operation tasks, including responding to alerts while on call

Software Engineer – Fullstack

HR Business Partner

Senior Software Engineer, Backend