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Senior Security Analyst

Musashino, Tokyo, Japan💼 Full-time🗓 2026-09-08 → 2026-09-25

Core

Technical anchor for security operations leading investigations, detection engineering, and incident response for a cross-border payment gateway.

Role type

Senior Security Analyst (SOC Lead)

Builds

Security operations capability, detection logic, and incident response workflows for payment infrastructure.

Domain

Cybersecurity / Financial Services / Payments

Deliverable

production ML models | product features | dashboards & analysis | client delivery | infrastructure

Required skills

Incident response, threat hunting, SIEM tuning, EDR forensics, MITRE ATT&CK, scripting (Python/PowerShell), team leadership, cloud security basics

Preferred skills

SOAR, container/Kubernetes security, malware analysis, compliance frameworks (SOC 2, ISO 27001, PCI DSS)

Technologies

Splunk, Microsoft Sentinel, Elastic, SOAR platforms, AWS, GCP, Azure

Responsibilities

Lead high-severity incident response, design and tune detection logic, conduct proactive threat hunts, perform forensic analysis, automate response steps, mentor junior analysts, partner with engineering to close security gaps

Seniority

Senior, hands-on IC with leadership responsibilities

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