# Security Engineer - Detection & Response

**Company:** [xAI](https://hotfix.jobs/companies/xai)
**Location:** Tokyo, Japan
**Role:** Security Engineering
**Experience:** 2+ years
**Skills:** Python, Networking, macOS, Windows, Linux, Cloud Security, Incident Response, Threat Intelligence, Threat Hunting, Intrusion Detection, Malware Analysis, Digital Forensics, Penetration Testing, Elastic, Opensearch
**Posted:** 2026-08-13

> Leads day-to-day threat management through detection engineering, threat hunting, incident response, security automation, and vulnerability analysis. Requires at least two years of information security experience, strong Python skills, and knowledge of operating systems, networking, and cloud security.

## Job Description

## Responsibilities

- Drive continual improvement in processes, procedures, and automations to improve team quality and effectiveness.
- Participate in a 24/7 on-call rotation for security incident response.
- Commandeer security incidents and update stakeholders.
- Identify and develop new detection use cases and optimize existing detections.
- Collaborate on technical directions and solutions with other teams.
- Research and analyze patterns in security events across global infrastructure.
- Identify, design, and lead threat-hunting missions to quantify and reduce threats.
- Manage and support log collection, security scanning, intrusion detection, and other security-related systems.
- Design and assist in developing automation to reduce false positives and handle events automatically.
- Analyze system security posture through testing and vulnerability-impact analysis.

## Requirements

- 2+ years of relevant information security experience.
- Self-starter able to execute tasks with minimal supervision.
- Strong Python scripting skills for security automation.
- Knowledge of networking and macOS, Windows, or Linux operating systems.
- Knowledge of vendor-agnostic cloud security fundamentals and practices.
- Experience managing or deploying security technology.
- Experience building queries and dashboards for security monitoring.
- Knowledge of current threats and techniques, with a desire to research and learn more.
- Experience with malware analysis, forensics, or penetration testing.
- Strong problem-solving and troubleshooting skills.

## Preferred Qualifications

- Certifications such as CISA, CRISC, CGEIT, Security+, CASP+, or similar.
- Experience with Elastic, OpenSearch, or similar platforms.
- Experience with open-source security automation tooling.



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