This position is closed and is no longer accepting applications.

Cloud Platform Engineer (K8S&NW specialist)

PayPay Minato-ku, Tokyo October 14 2025
  • 💴 No salary range given
  • 🏡
    Fully remote
    From Japan
  • 🌏
    Apply from abroad
    Relocate to Japan
  • 💬
    No Japanese required
    Business English
  • 🧪
    Intermediate level
    4+ years experience required

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
  • Japanese lessons on company time
  • Incredible scale

About the position

We are seeking a highly skilled and experienced Platform Engineer to manage and enhance our entire application delivery platform, from Cloudfront to the underlying EKS clusters and their associated components. The ideal candidate will possess deep expertise across cloud infrastructure, networking, Kubernetes, and service mesh technologies, coupled with strong programming skills. This role involves maintaining the stability, scalability, and performance of our production environment, including day-to-day operations, upgrades, troubleshooting, and developing in-house tools.

Tech Stack

  • AWS: VPC, EC2, ECS, EKS, Lambda, Cloudfront, WAF, MWAA, RDS, ElastiCache, DynamoDB, Opensearch, S3, CloudWatch, Cognito, SQS, KMS, Secret Manager, KMS, MSK
  • Terraform, Github Actions, Prometheus, Grafana, Atlantis, ArgoCD, OpenTelemetry

Responsibilities

  • Perform regular upgrades and patching of EKS clusters and associated components & oversee the health, performance, and scalability of the EKS clusters.
  • Manage and optimize related components such as Karpenter (cluster autoscaling) and ArgoCD (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.
  • Develop, maintain, and automate in-house tools and scripts using programming languages like Python or Go to improve platform operations and efficiency.
  • Configure and manage CloudFront distributions, WAF Policies for efficient & secure content delivery & routing.
  • Develop and maintain documentation for platform architecture, processes, and troubleshooting guides.

Requirements

  • Proven experience as a Platform Engineer, Site Reliability Engineer (SRE), or similar role with a focus on end-to-end platform ownership.
  • In-depth knowledge and hands-on experience of at least 4 years with Amazon EKS and Kubernetes.
  • Strong understanding and practical experience with Karpenter, ArgoCD, Terraform..
  • Solid grasp of core networking concepts and extensive experience of at least 5 years with AWS networking services (VPC, Security Groups, Network ACLs, CloudFront, WAF, ALB, DNS).
  • Demonstrable experience with SSL/TLS certificate management.
  • Proficiency in programming languages such as Python or Go for developing and maintaining automation scripts and internal tools.
  • Experience with monitoring and logging tools (e.g., Prometheus, Grafana, ELK stack).
  • Excellent problem-solving and debugging skills across complex distributed systems.
  • Strong communication and collaboration abilities.
  • 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.
  • Experience building or contributing to Kubernetes Controllers.
  • Experience with multi-cluster Kubernetes architectures.
  • Experience building AZ isolated, DR architectures.

Meet PayPay's Developers

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...
Photo of Adrian Mariadas

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...
Photo of Yoseph Savianto

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...

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...

Related jobs

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.