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Senior Security Engineer (Detection Operations : Email)

Seoul💼 Full-time🗓 2026-08-27 → 2026-09-25

Core

Design, operate, and monitor email security infrastructure to detect and respond to phishing, spam, and malware attacks, while developing detection policies and playbooks.

Role type

Senior Security Engineer (Email Detection Operations)

Builds

Email security solutions, detection policies, and incident response playbooks for Coupang's internal ecosystem.

Domain

Cybersecurity, Email Security, Threat Detection

Deliverable

production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work

Required skills

Email header analysis, Threat analysis and response, Malware and phishing website analysis, Email security policy setting, Email traffic analysis, Email security system operation, Phishing simulation execution, SPF/DKIM/DMARC implementation, Network security basics, System security basics, Analytical problem-solving, Data-driven communication

Preferred skills

Automation and scripting (Python, Go, Linux shell, Powershell), Cybersecurity certifications (CISSP, etc.), SQL queries and data visualization (Splunk, ELK Stack), Cloud platforms (AWS, Azure, GCP), OWASP and MITRE ATT&CK knowledge, On-premise and Cloud environment knowledge

Responsibilities

Design and implement email security infrastructure, Operate and monitor email security solutions, Identify and respond to email-based attacks (phishing, spam, malware), Develop detection policies and playbooks, Conduct email security reviews and maintain guidelines, Respond to security incidents and minimize damage, Execute phishing simulations and report trends, Research and apply latest email security technologies, Perform on-call duties for after-hours incidents

Seniority

Senior, hands-on IC

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