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About the Role
Lead the development and implementation of enterprise-wide security strategy in collaboration with the CISO and the security team. Protect a large-scale telecommunications infrastructure from cyber threats and continuously evolve it as a "trusted business foundation" that accelerates operations. Assess and analyze current security levels and maturity, create security policies and rules to mitigate risk, and provide technical support to elevate security levels, thereby supporting business growth. This role offers an environment where, through discussions in English with global teams, you can hone the technical skills needed to counter world-class threats.
Responsibilities
- Assess and analyze current security levels and maturity
- Create security policies and rules to mitigate risk
- Provide technical support to elevate security levels
- Lead root-cause identification and recurrence prevention when incidents occur
- Embody "proactive security" that leverages technical expertise to balance business growth with safety
- Integrate security tools into CI/CD pipelines
- Improve security processes in collaboration with development teams
- Monitor and analyze security incidents in large-scale environments
- Lead incident response from initial response through resolution
Requirements
- At least 3 years of practical experience in IT infrastructure and/or security-related fields
- Basic knowledge of IT infrastructure (networking, servers, cloud, etc.)
- Practical experience in security-related work (operations, design, assessments, etc.)
- Experience formulating security strategy and policies: practical experience creating security policies and building governance at the company-wide or business-unit level
- Security design and implementation in cloud environments (AWS/GCP/Azure): Experience with cloud-specific security configurations, IAM design, and implementing network security (including security implementation using IaC)
- Experience implementing and promoting DevSecOps
- Practical experience in incident response (CSIRT/SOC)
- Business-level English proficiency: able to engage in technical discussions, coordinate, and negotiate with global teams
- Security assessment: risk evaluation and risk mitigation planning
Skills
- IT infrastructure
- Security
- Networking
- Servers
- Cloud
- AWS
- GCP
- Azure
- IAM
- IaC
- DevSecOps
- CI/CD pipelines
- Vulnerability scanning
- Incident response
- CSIRT
- SOC
- Monitoring
- Analysis
- Risk assessment
- Risk mitigation
- Python
- Go
Location
- Remote
Work Type
- Full-time
Experience Level
- Mid-career
About the Company
- Rakuten is Japan’s largest marketplace and an internet ecosystem offering a wide range of over 70 services, including e-commerce, travel, banking, fintech, food delivery, golf, insurance, instant messaging, and mobile networks.
- The Communications & Energy Company is the division responsible for providing communication platforms to information and communications technology (ICT) and international telecommunications operators—primarily in the mobile phone sector—as well as for power and energy-related businesses.
- The Company CIO Office is working to strengthen IT strategy and governance at Rakuten Mobile and Rakuten Symphony, with the aim of accelerating business growth and ensuring sustainable development.
- Our top mission is to continuously strengthen the management and operation of a world-class security foundation for the telecommunications services provided by Rakuten Mobile and Rakuten Symphony, ensuring service stability and data safety while earning and preserving our customers’ trust.