Principal, Security Engineer

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 access lifecycle management platforms. Familiarity with open-source technologies and custom platform development. Experience operating identity services in global, multi-region environments. Strong understanding of security architecture, zero trust principles, and modern authentication technologies. Pay & Benefits: Our compensation reflects the cost of labor across several US geographic markets. At Coupang, your base pay is one part of your total compensation. The base pay for this position ranges from $209,000/year in our lowest geographic market to $360,000/year in our highest geographic market. Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience. General Description of All Benefits: • Medical/Dental/Vision/Life, AD&D insurance • Flexible Spending Accounts (FSA) & Health Savings Account (HSA) • Long-term/Short-term Disability • Employee Assistance Program (EAP) program • 401K Plan with Company Match • 18-21 days of the Paid Time Off (PTO) a year based on the tenure • 12 Public Holidays • Paid Parental leave • Pre-tax commuter benefits • MTV - [Free] Electric Car Charging Station General Description of Other Compensation: “Other Compensation” includes, but is not limited to, bonuses, equity, or other forms of compensation that would be offered to the hired applicant in addition to their established salary range or wage scale. Privacy Notice Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below: https://www.coupang.jobs/privacy-policy/ Coupang is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, or gender (including pregnancy, gender identity, gender expression, sexual orientation, transgender status), national origin, age, disability, medical condition, HIV/AIDS or Hepatitis C status, marital status, military or veteran status, use of a trained dog guide or service animal, political activities, or affiliations, citizenship, or any other characteristic or class protected by the laws or regulations in the locations where we operate. If you need assistance and/or reasonable accommodation in the recruiting process due to a disability, please contact us at usrecruiting@coupang.com . Job Requisition ID: R0077556