Cloud Software Developer | Japan Jobs | Fidel Consulting KK

Cloud Software Developer

Job Id : 9606
Posted : 2025-09-12
Industry : Telecommunications
Employment Type : Full Time, Permanent
Required Skills : Japanese JLPT N5, Linux , Linux OS, network stack, kubelet, Docker , Python, TCP/IP, DNS, Terraform
City : Tokyo
State : Tokyo
Country : Japan
Annual Salary : ¥6,000,000 ~ ¥8,000,000

Job Description

Appealing Points:

  • Work with cutting-edge infrastructure technologies: Utilize your deep expertise in Linux internals and Kubernetes to design, operate, and optimize modern container platforms.
  • Automation-driven engineering environment: Contribute by building tools in Go/Python and managing infrastructure through IaC tools like Terraform and Ansible.
  • Valuable OSS and distributed systems experience: Your contributions to open-source and knowledge of distributed storage and systems are highly appreciated and actively utilized.

Annual salary: 6 million and above

Job Qualification:

  • Linux: Deep understanding of the internal structure of the Linux OS, including the kernel, system calls, network stack, and file systems.
  • Kubernetes: Experience in cluster building, operation, and troubleshooting. Specifically, the ability to understand the behavior of components like kubelet, etcd, and CNI, and perform performance tuning and debugging.
  • Container Technologies: Deep knowledge of container runtimes such as Docker and containerd. Understanding of container isolation, namespaces, cgroups, and other mechanisms.
  • Programming: Experience in developing automation tools, operators, and custom controllers using languages such as Go, Python, and Rust.
  • Scripting: Experience in automation using bash and shell scripts.
  • IaC (Infrastructure as Code): Experience in infrastructure management using tools like Terraform, Ansible, and Helm.
  • Networking: Foundational knowledge of networking, including TCP/IP, DNS, routing, and firewalls.

 Preferred Qualifications

  • Linux Kernel: Experience in performance analysis and troubleshooting using tools like eBPF, perf, and ftrace.
  • Distributed Systems: Knowledge of designing and operating distributed systems.
  • Storage: Knowledge of distributed storage and file systems such as Ceph, NFS, and iSCSI.
  • Security: Knowledge of hardening security for Linux and Kubernetes.
  • OSS Contribution: Experience contributing to open-source projects.

Language Skills: Elementary level Japanese (JLPT N5)  and Business level English.

Company Description:

The largest eCommerce company in Japan, and the third-largest e-com Business-level merce market place company worldwide.

The organization provides a variety of consumer and business-focused services including e-commerce, e-reading, travel, banking, securities, credit card, e-money, portal and media, online marketing, and professional sports

[Measures against passive smoking]

No smoking indoors allowed

Designated smoking area