Principal, Security Engineer

Company Introduction

We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did I ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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

Coupang is investing in the next generation of identity and access management capabilities that support one of the largest and most complex technology environments in the region. We are looking for an experienced Security Engineer to help modernize our enterprise directory services and identity infrastructure while improving reliability, scalability, and security across a global environment.

This is a highly technical engineering role focused on the design, implementation, and operation of large-scale identity platforms. You will work on modernizing Active Directory and cloud identity services, strengthening authentication and authorization frameworks, and building foundational capabilities that support thousands of users and critical business systems.

The ideal candidate combines deep expertise in Active Directory with strong engineering ffundamentals and a track record of building and operating complex identity platforms in large enterprise environments.

What You Will Do

· Lead the Engineering design and build-out of Coupang’s enterprise directory services and identity platform modernization.

· Design, build, and operate large-scale Active Directory environments spanning multiple domains and geographies.

· Drive improvements in reliability, resiliency, security, and operational excellence across identity infrastructure.

· Partner with security, infrastructure, and platform teams to develop the next generation of IAM capabilities.

· Engineer solutions that strengthen authentication, directory services, access management, and identity lifecycle processes.

· Troubleshoot and resolve complex directory service, authentication, and integration issues as the highest level of technical escalation.

· Develop automation and tooling to simplify operations, improve scalability, and reduce manual effort.

· Evaluate and integrate modern identity technologies while supporting a hybrid environment that includes Active Directory, cloud identity providers, and internally developed solutions.

· Contribute to the development of custom IAM capabilities, services, and user experiences that support evolving business requirements.

· Help establish architectural direction and technical standards for enterprise identity platforms.

Basic Qualifications

· 12+ years of hands-on experience in Identity and Access Management, Directory Services, or Infrastructure Security engineering.

· Deep expertise in administering, engineering, and troubleshooting Microsoft Active

· Directory and Entra in large enterprise environments.

· Experience designing, migrating, or modernizing complex multi-domain Active Directoryenvironments.

· Strong understanding of LDAP, Kerberos, Group Policy, DNS, authentication protocols, and directory service architecture.

· Experience supporting highly available, mission-critical identity infrastructure at scale.

· Strong experience in building continuous controls around AD, Entra and IAM platforms.

· Strong scripting or software development skills in Python, Java, or similar languages.

· Experience automating operational processes and building engineering solutions rather than relying solely on commercial products.

· Proven ability to diagnose and resolve complex identity, authentication, and infrastructure reliability challenges.

· Bachelor's degree in computer science, Information Security, or related field, or equivalent practical experience.

Preferred Qualifications

· Experience leading or significantly contributing to enterprise-scale Active Directory transformation programs.

· Experience with Entra ID (Azure AD), Okta, or other enterprise identity platforms.

· Experience integrating IAM solutions with cloud and hybrid environments.

· Experience with identity governance, privileged access management, or acces