Responsibilities

Team Introduction 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 hypothesis-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 operations 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

Qualifications

Minimum Qualifications - 5+ years in security operations, incident response, detection engineering, or threat hunting roles - 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 --- Preferred Qualifications - Bachelor's degree in Computer Science, Cyber Security, or STEM field - Familiarity with SOAR platforms and automation of incident response tasks - Experience with detection-as-code pipelines, GitOps, or CI/CD rule deployment - Experience contributing to threat hunt frameworks or purple team exercises - Knowledge of red teaming, malware analysis, or digital forensics - Certifications such as GCIH, GCIA, GCTI, OSCP, or equivalent are a plus

Job Information