Security Operations Analyst - Detection Engineering & Threat Hunting

Responsibilities

About the team:
TikTok's IT security team is responsible for enterprise IT global cyber security, server security, endpoint security, application security construction, and protection work. They work to improve overall IT security capabilities and security posture, providing security processes, security assessments, security operations, and security vulnerability management services. The team also supports IT teams and business departments in meeting their security requirements.

Responsibilities
- Monitor security alerts and events generated by various security tools and technologies, such as SIEM, IDS/IPS, firewalls, and endpoint detection and response (EDR) systems.
- Build and tune high-fidelity detections across endpoint, identity, cloud, and SaaS telemetry sources.
- Reduce alert fatigue and false positives through improved severity tagging, disposal logic, and enrichment workflows.
- Conduct threat and scenario-driven threat hunts based on TTPs, anomalies, and threat intelligence.
- Identify and close detection gaps uncovered during incident response or hunting operations.
- Design and maintain SOAR playbooks and automation logic for triage, enrichment, and response.
- Partner with CTI and detection engineers to operationalize threat intelligence and attacker behaviors.
- Develop and maintain detection logic aligned with frameworks such as MITRE ATT&CK and MaGMa.
- Contribute scripts and tooling (e.g., Python, PowerShell) to improve investigation and response efficiency.
- Support 24/7 global SOC by contributing to alert routing, follow-the-sun workflows, and detection health monitoring.
- Assist in post-incident reviews to drive continuous improvement of detection coverage and response workflows.
- Coordinate Security Incident Response lessons learnt and post-mortem activities with XFN stakeholders.

Qualifications

Minimum Qualifications:
- Bachelor's degree in Computer Science, Cyber Security, or STEM field.
- Experience working in or supporting a 24/7 global security operations environment.
- Strong proficiency with SIEM platforms (e.g., Splunk, Chronicle, Elastic) and EDR tools (e.g., SentinelOne, CrowdStrike).
- Hands-on experience writing and tuning detection logic (e.g., Sigma, EQL, KQL, YARA).