Web Security Engineer

Position: Staff Web Security Engineer
We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did we ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we’re collectively disrupting the multi-billion-dollar e-commerce industry from the ground up. We are one of the fastest-growing e-commerce companies that established an unparalleled reputation for being a dominant and reliable force in South Korean commerce.

We are proud to have the best of both worlds — a startup culture with the resources of a large global public company. This fuels us to continue our growth and launch new services at the speed we have been since our inception. We are all entrepreneurs surrounded by opportunities to drive new initiatives and innovations. At our core, we are bold and ambitious people that like to get our hands dirty and make a hands-on impact.

At Coupang, you will see yourself, your colleagues, your team, and the company grow every day.

Our mission to build the future of commerce is real. We push the boundaries of what’s possible to solve problems and break traditional tradeoffs. Join Coupang now to create an epic experience in this always-on, high-tech, and hyper-connected world.

Role Overview The Detection Operations team is responsible for protecting Coupang's global attack surface across web, network, email, and endpoint security. We operate and manage a broad range of security technologies, including enterprise security appliances, endpoint protection platforms, and cloud-based SaaS security services. Our mission is to detect, investigate, and mitigate cyber threats before they impact the business. By combining proactive threat detection, rapid response, and in-depth root cause analysis, we help minimize security risks while continuously improving our overall security posture and preventing future incidents.

Why Join Detection Operations? At Coupang, security operates at massive scale. As a member of the Detection Operations team, you will have the opportunity to work across multiple security domains, including:
Web Security Network Security Email Security Endpoint Security Rather than being confined to a single technology or security domain, you will gain hands-on experience with a diverse set of security solutions and services that protect one of the largest e-commerce and technology platforms in the world. You will work closely with experienced security engineers and subject matter experts across multiple disciplines, providing unique opportunities to expand both your technical depth and breadth.

Team members are encouraged to take ownership, drive improvements, and contribute directly to strengthening Coupang's security capabilities.

What You Will Do Design, deploy, and manage security controls that protect externally facing web and API services from a wide range of cyber threats using industry-leading security platforms and services.

Analyze and tune Web Application Firewall (WAF) detections to reduce false positives and false negatives, improve security coverage, deploy security policies, and respond to emerging vulnerabilities and CVEs.Detect and mitigate automated and malicious bot activity, continuously improving detection logic, policy effectiveness, and overall bot defense capabilities.

Strengthen detection and mitigation capabilities against Distributed Denial-of-Service (DDoS) attacks through continuous monitoring, analysis, and policy optimization.

Conduct proactive web threat hunting activities to identify emerging attack patterns, strengthen detection capabilities, and improve preventive controls.

Develop and maintain operational procedures, documentation, and automation workflows to increase efficiency and…