Detection & Threat Hunting Security Analyst

TikTok Inc.; San Jose (CA); On-site; USD 112,000 - 223,000; Full time

Job summary

TikTok Inc. is seeking a skilled security analyst to join the IT security team. You will monitor alerts from SIEM, IDS/IPS, firewalls, and EDR tools, and build high-fidelity detections across endpoints, identity, cloud, and SaaS sources.

You will reduce noise, hunt threats, and help mature incident response workflows. Responsibilities include designing SOAR playbooks, operationalizing threat intelligence, and aligning detection logic with MITRE ATT&CK and MaGMa frameworks.

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).
• Deep understanding of attacker tactics and techniques (MITRE ATT&CK, threat modeling).
• Scripting ability in Python or similar languages to support automation, enrichment, or detection-as-code workflows.
• Experience conducting investigations using logs from identity providers, endpoints, cloud, and network telemetry.

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 a global SOC by contributing to alert routing, follow-the-sun workflows, and detection health monitoring. This position is part of a team that provides 24/7 support and requires working scheduled shifts, which may include holidays.
• 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.

Skills

SIEM proficiency

EDR experience

Detection logic tuning

Threat hunting

Threat intel understanding

Python scripting

Investigation with logs

Education

Bachelor's degree in CS / Cyber Security / STEM

Tools

Splunk

Chronicle

Elastic

SentinelOne

CrowdStrike

Job description

TikTok Inc. is seeking a skilled security analyst to join the IT security team. You will monitor alerts from SIEM, IDS/IPS, firewalls, and EDR tools, and build high-fidelity detections across endpoints, identity, cloud, and SaaS sources.

You will reduce noise, hunt threats, and help mature incident response workflows. Responsibilities include designing SOAR playbooks, operationalizing threat intelligence, and aligning detection logic with MITRE ATT&CK and MaGMa frameworks.