Cloud Platform Engineer (K8S&NW specialist)

**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:** Develop, maintain, and automate in-house tools, Kubernetes manifest generator engine and scripts using programming languages like Python or Go to improve platform operations and efficiency. Perform upgrades and patching of EKS clusters and associated components, and improve the process through safe, repeatable automation. Manage and optimize related components such as Karpenter (cluster autoscaling) and Argo CD (GitOps continuous delivery). Implement and manage service mesh solutions (e.g., Istio, Linkerd) for enhanced traffic management, security, and observability. Participate in an on-call rotation to provide 24/7 support for critical platform issues and monitor the platform for potential issues and implement preventative measures. Configure and manage CloudFront distributions, WAF web ACLs for efficient & secure content delivery & traffic management. Develop and maintain documentation for platform architecture, processes, and troubleshooting guides. Requirements Demonstrable experience with advanced software engineering practices, including unit/integration testing. Deep understanding of Kubernetes internals and the controller-runtime framework, experience developing, testing, and maintaining custom controllers/operators and CustomResourceDefinitions. Proven experience as a Platform Engineer, Site Reliability Engineer (SRE), or similar role with a focus on end-to-end platform ownership. Strong understanding and practical experience with Karpenter, Argo CD, Terraform.. Strong networking fundamentals and the ability to troubleshoot an end-to-end request path across CloudFront, WAF, load balancers, Kubernetes networking, service mesh, and workloads. Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience). Nice to haves While not specifically required, tell us if you have any of the following. Prior experience working with service mesh technologies (preferably Istio) in a production environment. Demonstrable experience with SSL/TLS certificate management. Experience with multi-cluster Kubernetes architectures. Experience building AZ isolated, DR architectures. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION About PayPay 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. Key benefits International engineering team Incredible scale Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. Apply for this position × I have a favour to ask. When you apply to PayPay, please select "Tokyo Dev" from the Application route field . This helps to keep this job board sustainable, so I'd be grateful for your support with this. - Paul, Founder of TokyoDev Continue applying © 2026 Privacy Policy **Requirements:** Demonstrable experience with advanced software engineering practices, including unit/integration testing. Deep understanding of Kubernetes internals and the controller-runtime framework, experience developing, testing, and maintaining custom controllers/operators and CustomResourceDefinitions. Proven experience as a Platform Engineer, Site Reliability Engineer (SRE), or similar role with a focus on end-to-end platform ownership. Strong understanding and practical experience with Karpenter, Argo CD, Terraform.. Strong networking fundamentals and the ability to troubleshoot an end-to-end request path across CloudFront, WAF, load balancers, Kubernetes networking, service mesh, and workloads. Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience). **Nice to have:** While not specifically required, tell us if you have any of the following. Prior experience working with service mesh technologies (preferably Istio) in a production environment. Demonstrable experience with SSL/TLS certificate management. Experience with multi-cluster Kubernetes architectures. Experience building AZ isolated, DR architectures. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION About PayPay 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. Key benefits International engineering team Incredible scale Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. Apply for this position × I have a favour to ask. When you apply to PayPay, please select "Tokyo Dev" from the Application route field . This helps to keep this job board sustainable, so I'd be grateful for your support with this. - Paul, Founder of TokyoDev Continue applying © 2026 Privacy Policy