Product Security Engineer (Infrastructure)

**About the company:** PayPay Minato-ku, Tokyo With over 70M million registered users (as of July 2025), PayPay is the country’s most popular mobile wallet used by approximately one out of every two smartphone users in Japan. **Responsibilities:** Analyzing security risks relevant to the production infrastructure Designing security measures for the product infrastructure environment Implementing and running security solutions (SIEM, vulnerability management, network security, cloud security, container security, etc.) Improve security incident handling within product division. Improving observability and monitoring for security information and events. Assisting infrastructure teams in prioritizing security goals Assisting infrastructure teams in implementing and running secure solutions Participating in major infrastructure projects as a security expert Requirements 2+ years of infrastructure security or relevant experience Solid understanding of security principles, protocols, and best practices Solid programming skills in one or more programming languages, such as Java, Python, Golang Experience leading projects in any kind of security solutions, such as CNAPP, PAM, IDS/IPS, SIEM, SOAR, WAF, NGFW, etc Hands-on experience with cloud platforms, preferably AWS Hands-on Terraform experience. Experience with other IAC tools is also acceptable Hands-on experience with CI/CD pipelines and tools like Github Action, Jenkins, ArgoCD, etc Strong teamwork skills and the ability to collaborate with others in a diverse environment Enjoy taking up a challenge and driving it to a conclusion Nice to haves While not specifically required, tell us if you have any of the following. Previous experience working in DevOps, SRE, or similar roles Experience working with microservice-based systems Experience working in a security position within the fintech industry Native or business level Japanese proficiency APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION Meet PayPay's Developers Growing your career by asking for you want with Ashwini Meshram Ashwini leads one of PayPay’s payment sub-teams. She got there by doing something she’s done throughout her career: identifying something she wants to do and asking to do it. Read their story... Refactoring PayPay’s Android App with Adrian Mariadas Adrian came to Japan to join PayPay as an Android Engineer. As the app has grown in scope, refactoring the codebase to ensure development can continue at a rapid pace has been a big part of his job. Read their story... iOS Development at PayPay with Yoseph Savianto Yoseph joined PayPay after being attracted to their mission of making Japan a cashless society. As an iOS Engineer, he originally joined their iOS feature team, but now works on their platform team, creating an internal SDK for their iOS and Android apps. Read their story... Rapidly scaling to tens of millions of users with Shilei Long Shilei started working on PayPay before it launched, and has seen it grow into a product used by tens of millions of users. He explains how diversity has helped them overcome challenges, and what PayPay is looking for in candidates. Read their story... **Requirements:** 2+ years of infrastructure security or relevant experience Solid understanding of security principles, protocols, and best practices Solid programming skills in one or more programming languages, such as Java, Python, Golang Experience leading projects in any kind of security solutions, such as CNAPP, PAM, IDS/IPS, SIEM, SOAR, WAF, NGFW, etc Hands-on experience with cloud platforms, preferably AWS Hands-on Terraform experience. Experience with other IAC tools is also acceptable Hands-on experience with CI/CD pipelines and tools like Github Action, Jenkins, ArgoCD, etc Strong teamwork skills and the ability to collaborate with others in a diverse environment Enjoy taking up a challenge and driving it to a conclusion **Nice to have:** While not specifically required, tell us if you have any of the following. Previous experience working in DevOps, SRE, or similar roles Experience working with microservice-based systems Experience working in a security position within the fintech industry Native or business level Japanese proficiency APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION Meet PayPay's Developers Growing your career by asking for you want with Ashwini Meshram Ashwini leads one of PayPay’s payment sub-teams. She got there by doing something she’s done throughout her career: identifying something she wants to do and asking to do it. Read their story... Refactoring PayPay’s Android App with Adrian Mariadas Adrian came to Japan to join PayPay as an Android Engineer. As the app has grown in scope, refactoring the codebase to ensure development can continue at a rapid pace has been a big part of his job. Read their story... iOS Development at PayPay with Yoseph Savianto Yoseph joined PayPay after being attracted to their mission of making Japan a cashless society. As an iOS Engineer, he originally joined their iOS feature team, but now works on their platform team, creating an internal SDK for their iOS and Android apps. Read their story... Rapidly scaling to tens of millions of users with Shilei Long Shilei started working on PayPay before it launched, and has seen it grow into a product used by tens of millions of users. He explains how diversity has helped them overcome challenges, and what PayPay is looking for in candidates. Read their story...