Job Description

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

- 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.

Minimum Qualifications

- 4+ years in security operations, incident response, detection engineering, or threat hunting roles

- This position is part of a team that provides on-call support and requires working scheduled shifts, which may include holidays.

- 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, penetration testing, malware analysis, or digital forensics

- Certifications such as GCIH, GCIA, GCTI, OSCP, or equivalent are a plus