Threat Hunter & Detection Engineer - Security Operations

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

Job summary

TikTok Inc. is seeking an experienced IT security professional to join our global security operations team in San Jose. You will monitor alerts, build detections across endpoint, identity, cloud, and SaaS, and drive incident response improvements.

You will work with cross-functional teams, apply MITRE ATT&CK and MaGMa frameworks, write automation scripts, and participate in on-call rotations, holidays included, to strengthen our security posture.

Qualifications

• 4+ years in security operations, incident response, detection engineering, or threat hunting.
• On-call shifts including holidays.
• Strong proficiency with SIEM platforms (Splunk, Chronicle, Elastic) and EDR tools (SentinelOne, CrowdStrike).
• Hands-on experience writing and tuning detection logic (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.
• Experience conducting investigations using logs from identity providers, endpoints, cloud, and network telemetry.

Responsibilities

• Monitor security alerts and events from SIEM, IDS/IPS, firewalls, and 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 MITRE ATT&CK and MaGMa.
• Contribute scripts and tooling (e.g., Python, PowerShell) to improve investigation and response efficiency.
• This position is part of a team that provides on-call 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 expertise

EDR tooling

Detection logic

MITRE ATT&CK

Python scripting

Education

Bachelor's degree in Computer Science, Cyber Security, or STEM

Tools

Splunk

Chronicle

Elastic

SentinelOne

CrowdStrike

Sigma

EQL

KQL

YARA

Job description

TikTok Inc. is seeking an experienced IT security professional to join our global security operations team in San Jose. You will monitor alerts, build detections across endpoint, identity, cloud, and SaaS, and drive incident response improvements.

You will work with cross-functional teams, apply MITRE ATT&CK and MaGMa frameworks, write automation scripts, and participate in on-call rotations, holidays included, to strengthen our security posture.