Teams at Rakuten Group, Inc.

Conduct manual and automated penetration testing across web, mobile, API, cloud, infrastructure, telecom, and AI/ML systems. Perform red teaming, adversary emulation, code and architecture reviews, exploit validation, vulnerability research, and security assessments. Produce proof-of-concepts and technical reports, recommend remediation, validate fixes, and research emerging offensive security techniques.

Leads detection engineering for Rakuten’s Cyber Defense Operations, developing Detection-as-Code pipelines, AI/LLM-driven detection, eBPF runtime security, threat hunting, red teaming, deception technologies, AI guardrails, and SOAR integrations. The role coordinates with DFIR, CTI, SOC, and AI/ML teams while securing Kubernetes and Linux workloads. It requires 10+ years of cybersecurity experience, advanced coding in Python, Go, or Rust, container security expertise, telecommunications knowledge, and offensive security experience.

Designs and evaluates server hardware for cloud infrastructure, including specifications, component testing, deployment, operational handover, troubleshooting, root-cause analysis, repairs, and vendor coordination. The role supports production server hardware in large-scale virtualized datacenter environments and requires server and component design expertise, Linux and device-driver knowledge, and scripting experience.