SOC Analyst - Security Operations Center Group, Cyber Defense Operations Section (RMI Security Eng. & Ops Dep)
Rakuten Mobile, Inc. · JP
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About the Role
We are seeking a highly technical and innovative SOC Analyst (L2) to be a key architect of our future-ready SOC, leveraging LLMs and AI-powered tools to neutralize advanced adversaries. This role is crucial during a critical transformation phase to address the era of autonomous, AI-driven cyber threats, evolving the SOC from reactive monitoring to proactive, intelligence-led, and automated defense.
Responsibilities
- Utilize LLMs and AI-augmented security platforms to accelerate threat hunting, incident triage, and forensic analysis.
- Develop workflows to identify and respond to autonomous AI-based attacks.
- Contribute to the SOC’s capability roadmap.
- Recommend and implement structural improvements to toolsets and processes.
- Perform deep-dive analysis into containerized environments and Kubernetes clusters.
- Implement security controls against container-specific exploits and automated lateral movement.
- Participate in the continuous training and upskilling of the SOC team.
- Translate technical findings into new playbooks and SOPs.
- Lead the investigation of complex incidents.
- Apply "Defense in Depth" principles to identify environmental gaps and propose architectural hardening.
- Collaborate with the L3 Manager to tune detection logic.
- Integrate AI-based feedback loops into our SIEM/SOAR infrastructure.
- Simulate and test defenses against AI-powered attack tools using an "OffSec" mindset.
Requirements
- Bachelor’s degree in Computer Science, Cyber Security, or equivalent.
- 5–8 years of experience in a SOC, incident response, or security engineering role.
- Strong understanding of SIEM/SOAR ecosystems and optimization for AI-driven detection.
- Relevant certifications (e.g., GCIH, GCSA, CKAD, CKS, or AI-Security specific certifications).
Skills
- Containerization (Docker/Kubernetes)
- Telco environments (5G Core, Signaling Protocols)
- SOAR platforms
- Python
- Go
- Bash
- Cloud Security (AWS/Azure/GCP)
- LLM-based security tools
Experience Level
- 5-8 years
Education Level
- Bachelor's degree in Computer Science, Cyber Security, or equivalent
About the Company
- Cyber Defense Operations Section operates a 24/7 Security Operations Center (SOC) protecting Rakuten Group's critical infrastructure.
- We are currently in a critical transformation phase to address the era of autonomous, AI-driven cyber threats.
- Our mission is to evolve from a reactive monitoring unit into a proactive, intelligence-led, and automated defense organization.