Site Reliability Engineer (Bilingual)

**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:** Analyze current technologies used in the company and develop monitoring and notification tools to improve observability and visibility. Ensure system stability by pre-emptively verifying failure scenarios and implement solutions to reduce MTTR Develop solutions to improve system performance with a focus on high availability, scalability and resilience Integrate telemetry and alerting platforms to track and improve reliability of systems Implement industry best practices for system development, configuration management and system deployment Ensure seamless flow of information between teams by documenting knowledge gained Be up to date on modern technologies and trends to advocate for inclusion within products if they add value Participate in incident management including troubleshooting production issues, driving root cause analysis (RCA) and actively sharing lessons learned to improve system reliability and internal knowledge. Requirements Experience troubleshooting, tuning high performance microservice architectures running on Kubernetes and AWS in highly available production environments. 5+ years experience in software development in Python, Java, Go, etc with strong fundamentals in data structures, algorithms, problem solving and complexity analysis. *During the selection process, you will have a coding challenge. Curious and proactive in finding performance bottlenecks, scalability and resilience problem areas and addressing them. Experience with observability tools and gathering data. Database knowledge such as RDS, NoSQL, distributed TiDB, etc. Excellent communication skills, collaborative and getting things done attitude. Enjoy taking up a challenge and driving it to conclusion. Ability to verbally communicate in both English and Japanese. Nice to haves While not specifically required, tell us if you have any of the following. Container image management and optimization. Experience in large distributed system architecture and capacity planning. Understanding of IaC, automation tools, terraform, cloud formation, etc. Background in SRE/DevOps concepts and implementation. Experience in managing monitoring tools like CloudWatch, VictoriaMetrics, Prometheus and reporting with Snowflake and Sigma. In depth knowledge of web technologies such as CloudFront, Nginx, etc. Experience in designing, implementing or maintaining disaster recovery strategies and multi-region architecture to ensure high availability, resilience, and business continuity across critical systems. Business proficiency level in both English and Japanese. 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:** Experience troubleshooting, tuning high performance microservice architectures running on Kubernetes and AWS in highly available production environments. 5+ years experience in software development in Python, Java, Go, etc with strong fundamentals in data structures, algorithms, problem solving and complexity analysis. *During the selection process, you will have a coding challenge. Curious and proactive in finding performance bottlenecks, scalability and resilience problem areas and addressing them. Experience with observability tools and gathering data. Database knowledge such as RDS, NoSQL, distributed TiDB, etc. Excellent communication skills, collaborative and getting things done attitude. Enjoy taking up a challenge and driving it to conclusion. Ability to verbally communicate in both English and Japanese. **Nice to have:** While not specifically required, tell us if you have any of the following. Container image management and optimization. Experience in large distributed system architecture and capacity planning. Understanding of IaC, automation tools, terraform, cloud formation, etc. Background in SRE/DevOps concepts and implementation. Experience in managing monitoring tools like CloudWatch, VictoriaMetrics, Prometheus and reporting with Snowflake and Sigma. In depth knowledge of web technologies such as CloudFront, Nginx, etc. Experience in designing, implementing or maintaining disaster recovery strategies and multi-region architecture to ensure high availability, resilience, and business continuity across critical systems. Business proficiency level in both English and Japanese. 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...