PayPay Corporation.

Product Security Engineer

PayPay Corporation.

Remote job description

PayPay is looking for a Product Security Engineer to work on our payment system to deliver the best payment experience for our customers.

  • Security architecture reviews of existing and upcoming projects.
  • Acting as both a builder and a breaker by creating tools to help engineers write more secure code and performing penetration tests of public and internal applications.
  • Working in a fast paced environment where projects and prioritization may change frequently, security will always remain.
  • Participate in setting up a Bug Bounty program, writing proof of concepts, assessing risk, communication with external reporters.
  • Implementing and maintaining technologies for security, such as vulnerability testing, logging, monitoring and incident responses.

Tech Stack We select the best combination of tech at times.
| Python, Golang
| MySQL/AuoraDB, DynamoDB, ELK, Kafka, Redis, TiDB
| AWS, GCP, TCP Networking, SSL/TLS, Key Management Systems, Certificate Authorities
|Snyk, SonarQube, Dome9
|Slack, Zoom


  • 3+ years of experience as a Security Engineer.
  • Experience with Linux internals and hardening
  • Must have experience in programming languages and frameworks such as Python and Bash
  • Comfortable with identifying and advising on remediation for Application Security vulnerabilities
  • Up to date with the latest developments in security
  • Development of Proof of Concept exploits

Preferred Qualifications

  • CVE Contributions
  • Open Source tools contributions
  • Published papers / blogs / articles

Hiring Process

  1. Application Review (1-2 weeks)
  • HR and Team will review your resume
  • Code challenge (online)
    • Coding Test will be sent via Hirevue system
    • It takes 3-4 hours (max) to complete
    • If you need to extend the due date, please contact HR
  • Interviews (online)
    • 2-3 rounds of online interview(s)
    • Live Coding could be requested
    • Please make sure the reason you applied to PayPay (Why Fintech? Why Startup? Why PayPay?)
  • Job Offer
  • *Relocation to Japan
    • Due to the current COVID-19 situation, we cannot sponsor working VISA to Japan. However as a temporary solution, you may be able to start working with us as an individual contractor. Please discuss with your recruiter about this opportunity.
    • Once the COVID-19's over, we will ask all employees in overseas to relocate to Japan. We will fully support your relocation.

    Other Information

    [Corporate Blog]

    [Product Blog]


    Company: PayPay Corporation.
    Job title: Product Security Engineer (Full-Remote in Japan*) at PayPay Corporation. (Tokyo, Japan) (allows remote)
    Job tags: security, devsecops, ctf, spring

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