Manage IT risk and security operations, including risk assessment, incident management, and policy development.
About this role
This role sits in Rakuten Mobile’s Security Engineering & Operations Department, within the Network Security Engineering Section. It supports secure infrastructure for mobile and related services across on-premises, cloud, and Kubernetes environments, with a focus on Linux platforms, identity and access management, and secrets and certificate controls.
The engineer designs, builds, operates, and troubleshoots Red Hat Enterprise Linux environments and Kubernetes clusters; manages IPA/FreeIPA authentication, user lifecycle, authorization, and policies; and operates HashiCorp Vault or equivalent tools for secrets, PKI, certificates, and access control. Duties also include security hardening, patching, vulnerability remediation, Ansible-based automation, incident response, root-cause analysis, and operational standardization. Applicants need at least eight years of hands-on Linux/RHEL experience, practical Kubernetes and IPA/FreeIPA experience, secrets or certificate-management experience, networking fundamentals in DNS, TLS/PKI, firewalls, and load balancers, and independent incident-analysis ability.
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