Cloud Infrastructure Engineer

Join a fast-growing cloud infrastructure team supporting large-scale private cloud environments. We are looking for a highly skilled Infrastructure Engineer with strong Kubernetes, container, and Linux expertise, combined with solid software development capabilities.

Key Responsibilities:

Operations:

• Cluster and node provisioning
• 24/7 on-call rotation (approx. 1 day per week)
• OS and middleware updates
• Security compliance and risk analysis
• Midnight releases and monitoring
• Incident handling and operational documentation

Development:

• Design and proposal documentation (architecture diagrams, pros/cons analysis)
• Cluster and node automation
• OS and middleware auto-upgrades
• Self-healing and reliability engineering initiatives

User & Migration Support:

• Advanced technical support beyond standard user support scope
• Migration support from legacy platforms to private cloud

Environment:

• Private cloud infrastructure (Kubernetes, bare metal, VM, containers)
• Languages: Go, Python, Groovy, Shell
• Automation: Ansible, in-house Go tools, Operator framework
• Monitoring: Prometheus, Cortex, Grafana, Kibana, Datadog, PagerDuty
• CI/CD: Jenkins
• Tools: JIRA, Confluence, Slack, MS Teams

Mandatory Qualifications:

• Certified Kubernetes Administrator (CKA) – or ability to obtain within 3 months
• Experience developing web services using statically typed languages (Go, Java, C++, etc.)
• 3+ years of operations experience in a large enterprise environment
• Strong Kubernetes, container, and Linux troubleshooting expertise
• Experience operating large-scale systems (100+ servers)

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• Knowledge of networking (TCP/IP) and distributed systems / HA architecture
• Experience leading projects
• Strong accountability and deadline-driven mindset

Preferred:

• Open source contributions
• Degree in Computer Science or related field
• Experience automating large-scale system operations
• Experience developing mid-to-large scale applications
• Experience with multiple monitoring tools
• Private or public cloud experience

Salary: 7 to 10 Million JPY annually

Visa Sponsorship: Available

Location: Tokyo, Japan

If you are passionate about Kubernetes, cloud infrastructure, and building scalable enterprise platforms, we’d love to connect.