Software Engineer（不正対策エンジニア） at PayPay

PayPay is a fintech company with over 68 million users as of March 2025, composed of a diverse team from approximately 50 countries and regions. PayPay's corporate engineering team supports the company's operations by developing internal business systems across merchant, customer, and authority domains. Their mission is to contribute to the company's growth through technology, driving development and operational efficiency with speed.

The Software Engineer will focus on ensuring a safe and user-friendly experience by developing and maintaining APIs to assess risks within the PayPay app. This includes creating APIs that block transactions based on request content and aggregated transaction results. The role involves coding in Scala, CQL, and Python. The engineer will be responsible for the entire process from negotiating with other teams and determining specifications to development, testing, monitoring, and operation.

• Developing and operating APIs to assess risks within the PayPay app (using SaaS services).
• Creating APIs to block transactions based on request content and aggregated transaction results.
• Coding in Scala, CQL, and Python.
• Handling the entire process from specification to development, testing, monitoring, and operation.

Requirements:

• Experience in promoting business process improvement/efficiency projects (PM/PL/PMO).
• Experience in custom application development (2+ years).
• Business-level Japanese language skills.
• Effective communication skills with diverse stakeholders both internally and externally.

The role offers:

• Remote work (WFA - Work From Anywhere at Anytime).
• Super flex time (no core time).
• Comprehensive benefits including social insurance, defined contribution pension plan and paid leave.