Senior Staff Backend Engineer, Security
About The Position
As a Senior Staff Engineer on Coupang’s Security Infrastructure team, you will build the platform that enables the company to earn and grow customer confidence while rapidly expanding and scaling its services. The team builds core security services and libraries used across Coupang, supporting teams and thousands of microservices. Its work includes Identity and Access Management (IAM) functionality for vendors, sellers, and shoppers, with the goal of improving security while increasing engineer productivity. You will develop features for authentication and authorization platforms and integrate them deeply with Coupang’s service infrastructure. The role calls for an engineer who combines strategic and design thinking with careful implementation and operations, and who is passionate about building usable, reliable, and efficient platforms at scale.
Requirements
- Bachelor’s degree in Computer Science, Electrical Engineering, Math, or a closely related field.
- 8 years of experience in backend software development.
- Experience working in cloud environments, particularly AWS.
- Demonstrated experience building and maintaining highly available, distributed systems.
Nice To Haves
- Master’s or PhD degree in computer science or another related technical field.
- Working knowledge of security protocols such as OIDC and OAuth2.
- Working knowledge of IAM systems such as identity providers and role-based authorization.
- Experience with Kubernetes, gRPC, and Istio.
- Experience building high-reliability and low-latency systems in the cloud.
- Experience with CI/CD pipelines and Infrastructure as Code.
- Fluency in one or more of C++, Java, and Go.
- Recent hands-on experience designing and developing large-scale distributed systems.
- Experience with cloud computing using AWS, Azure, or GCP.
- Deep understanding of cloud application design and architecture, API design patterns, performance, and scale.
Responsibilities
- Develop IAM platforms and iterate rapidly while collaborating as part of a small, highly talented team.
- Partner with teams across the company to understand their current needs and future direction.
- Identify technical solutions systematically, balancing strategic goals with immediate impact.
- Design and architect robust, scalable systems.
- Hands-on develop critical infrastructure components.
- Write back-end APIs in Java and Go using industry-standard frameworks.
- Drive platform adoption across teams and help teams prioritize and move with urgency.
- Investigate critical system issues and continuously improve operational excellence.
- Serve as a role model for other engineers and shape the team culture.
Benefits
- Medical, dental, vision, and life insurance, plus AD&D insurance.
- Flexible Spending Accounts (FSA) and Health Savings Account (HSA).
- Long-term and short-term disability coverage.
- Employee Assistance Program (EAP).
- 401K plan with company match.
- 18–21 days of paid time off per year, based on tenure.
- 12 public holidays.
- Paid parental leave.
- Pre-tax commuter benefits.
- Free electric car charging station.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
