Security Detection & Automation Engineer - Product Security Section, Cyber Security Defense Department (CSDD)
Rakuten5 days ago
Tokyo, JapanSenior
Responsibilities
- Develop, tune, and maintain high-fidelity detection rules across SIEM, EDR, and cloud-native security tools.
- Design automated SOAR workflows and response playbooks to reduce manual security operations work.
- Integrate automated security guardrails into CI/CD pipelines in partnership with SRE and DevOps teams.
- Analyze logs, traffic patterns, and system telemetry to identify sophisticated threats.
- Automate verification of hybrid cloud security posture, continuous compliance, and configuration drift detection.
- Build Python or Go tools and scripts to improve visibility and bridge gaps in the security stack.
Requirements
- More than four years of experience in security engineering, detection engineering, or incident response.
- Hands-on experience securing Kubernetes, virtualized environments, and AWS, GCP, or Azure cloud-native environments.
- Strong proficiency in Python, Go, or Ruby for security automation and API integration.
- Experience developing detection rules in SIEM, EDR, or cloud security platforms.
- Experience automating manual security tasks through SOAR or custom scripts.
- Deep understanding of network protocols, Linux and Windows internals, and web application architectures.
- Ability to collaborate globally and communicate complex technical concepts clearly.
- Preferred experience mapping detections to MITRE ATT&CK and using Jenkins, GitLab CI, or GitHub Actions.
- Preferred experience with identity-centric security, micro-segmentation, and security-as-code practices.
- Relevant security certifications such as GCIA or GDAT are preferred.
Tech Stack
Categories
About Rakuten
Rakuten Group builds e-commerce marketplaces, financial services (credit cards, payments, banking, securities), and digital/communications offerings for consumers and merchants worldwide. It monetizes through transaction fees, financial services income, advertising, and mobile subscriptions; flagship businesses include Rakuten Ichiba, Rakuten Card, and Rakuten Mobile. Founded in 1997 and headquartered in Setagaya, Tokyo, the company is publicly listed on the Tokyo Stock Exchange and operates across many countries and regions.