[L6-2] Staff Back-end Engineer (Security Infrastructure)

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’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 As a Staff Engineer on the Security Infrastructure team, you will build the platform that enables Coupang to win and grow our customers’ confidence while rapidly expanding and scaling our services. The Security Infrastructure team builds core security services and libraries used by all Coupang services to secure themselves and our customers. Our work supports teams across Coupang and thousands of microservices. We aim to make Coupang and its products more secure while also making our engineers more productive. Our responsibilities include building Identity and Access Management (IAM) functionality for our entire ecosystem of vendors, sellers and shoppers. We are looking for engineers who are passionate about building platforms at scale, with emphasis on usability, reliability and efficiency. You will work on adding features to our authentication and authorization platforms, and deeply integrating them with Coupang’s service infrastructure. The successful candidate will be a well-rounded engineer who balances strategic and design thinking with attention to detail in implementation and operations. If that sounds like you, come join us! What You Will Do Develop our IAM platforms and rapidly iterate while collaborating actively as part of a small, highly talented team Partner with teams across the company to understand their current needs and future direction Think systematically to identify technical solutions, balancing strategic goals and immediate impact Demonstrate excellence in architecture and design, resulting in robust and scalable systems Hands-on develop critical infrastructure components Write back-end APIs in Java and Go, using industry-standard frameworks Work across teams to drive platform adoption, helping teams prioritize ruthlessly and “move with urgency” Dive deep into critical system issues, constantly raising the bar on Operational Excellence Serve as a role model for other engineers and shape our team culture Basic Qualifications Bachelor's degree in Computer Science, Electrical Engineering, Math, or a closely related field 6 years of experience in backend software development Experience working in cloud environments, particularly AWS Demonstrated experience in building and maintaining highly available, distributed systems Preferred Qualifications Masters or PhD degree in computer science or other 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 working 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 Fluent in one or m