Senior Staff Backend Security Engineer

We exist to wow our customers. We know were 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 were 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 whats 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

We are seeking a highly skilled Senior Staff Backend Security Engineer with deep technical expertise and a passion for building secure reliable and scalable systems. This role focuses on technical leadership architecture and hands-on development to ensure the security and resilience of our core platforms.

You will drive the security quality and reliability of backend systems while influencing architecture decisions mentoring engineers and partnering with product teams on strategic initiatives.

What You Will Do

• Architect and implement secure scalable backend systems using Java (Spring Boot) and AWS cloud-native services.
• Lead technical design reviews enforce security best practices and ensure system reliability and performance.
• Develop and integrate security features such as authentication authorization and identity management (SSO OIDC RBAC/ABAC SCIM).
• Design and implement API security patterns and API authorization at scale for microservices and service mesh environments.
• Embed Generative AI capabilities (e.g. embeddings RAG LLM APIs) into product workflows securely and responsibly.
• Write and review code unblock complex technical challenges and make critical architectural decisions.
• Champion secure SDLC practices cryptography standards and compliance requirements.
• Collaborate with cross-functional teams to define technical roadmaps and deliver mission-critical systems at scale.

Minimum Qualifications

• Bachelors degree in Computer Science or related technical field.
• 8 years of professional software development and security engineering experience.
• Proven experience designing and developing large-scale distributed systems.
• Strong knowledge of security architecture

Preferred Qualifications

• Recent hands-on experience (last 34 years) building secure distributed systems at scale with strong exposure to AI/ML development and hosting in production environments.
• Experience with cloud platforms (AWS Azure GCP) for identity ML infrastructure and secure deployment.
• Familiarity with Generative AI integration and responsible implementation of LLM-based workflows.
• Exposure to data security principles including encryption secure data pipelines and compliance frameworks.
• Ability to influence technical direction and mentor engineers in security best practices.
• Proven track record of delivering mission-critical scalable systems in production at enterprise scale.
• Expertise in Java Spring Boot and AWS architecture/services (EKS S3 Lambda RDS IAM KMS).
• 7 years of solid experience with fundamental algorithms system design and large distributed systems.
• Deep experience in cryptography and PKI systems including certificate management and secure key lifecycle
• 7 years of coding experience specifically in Java.
• Strong knowledge of security architecture authentication/authorization and cryptographic principles.
• Hands-on experience in building large-scale serving and data infrastructure.
• Experience with service-oriented architecture and web application/services development
• Practical experience in utilizing AWS (Amazon Web Services).
• Experience in designing and constructing machine learning-based applications and systems.
• Experience in leading cross-team system design and execution.

Pay & Benefits

Our compensation reflects the cost of living 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 $159000/year in our lowest geographic market to $324000/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 Paid 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.

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

Requisition # R0067878

Required Experience:

Staff IC