Senior Staff Engineer - Backend (Gateway Service)

About the Company :

At Coupang we are building the future of ecommerce. 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 exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did we ever live without Coupang?” 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.

The Gateway Services is responsible for Coupang’s identity platform including Coupang’s external users authentication in a micro-service ecosystem which scales to thousands of micro-services. Develop and implement enterprise-wide identity and access management security policies and procedures. Manage the provisioning, de-provisioning, and review of user access rights across multiple systems and applications. Perform user access audits to ensure that security policy and compliance requirements are met. Ensure user accounts are terminated and access rights are revoked when necessary. We are in a process to revolutionize our developer experiences and internal infrastructure by adopting the best technologies available.

As a Senior Staff Engineer in Developer platform, you will partner with leaders of multiple platform teams. You will work closely with the product team to define and implement simple solutions of complex infrastructure problems while ensuring to build a highly scalable, reliable and efficient platform for our customers. You will technically lead projects working on full stack development teams using JAVA, AWS, Kafka, Kubernetes, gRPC and service mesh. You will be accountable for raising the bar on engineering and operational excellence.

We are looking for an engineer who has deep understanding of security in a distributed system, hands-on experiences in managing, using, Identity provider, Kubernetes, gRPC and service mesh. You will be responsible to design the architecture and lead the team to deliver a modern platform that powers all Coupang’s internal services.

What You Will Do :

• Take ownership of Identity and Access platforms and rapidly iterate while collaborating actively as part of a small, highly talented team. 
• Write back-end APIs using REST/GraphQL/Hibernate using the Spring-boot and Python frameworks. 
• Architect workload and service management infrastructure.   
• Hands-on develop critical infrastructure components. 
• Decompose complex problems into simple, straightforward solutions, providing mechanisms for the teams to prioritize ruthlessly and “move with urgency”. 
• Demonstrate excellence resulting in scalable systems and services with the highest quality architecture and design. 
• Dive deep into critical system issues, proactively addressing similar root causes, and raise the bar on Operational Excellence. 
• Collaborate with other Coupang tech leaders to make the service extensible to unlock opportunities for innovations. 

Basic Qualifications :

• One who has bachelor’s degree in computer science or related technical fields.
• One who has 12+ years professional software development experience
  
• One who has 2+ years’ experience of project tech lead.
• Experience with configuring, maintaining Identity provider to handle requests at scale.
• One who has hands-on experience in designing and developing large scale distributed system in the last 3 years.
• One who is fluent in one or more among C++, Java and Go.
• Proven track record of delivering mission critical systems.
• Experience with cloud computing using AWS or Azure or GCP. 

Preferred Qualifications :  

• Strong experience with at least one of server-side webapp frameworks: Springboot.
• Working knowledge of databases, cache systems like redis, infinispan, Quarkus 
• Knowledge of OIDC, Oauth2, FIDO protocols. Experience with tools like WSO2, Keycloak are highly helpful 
• Deep understanding of modern web applications design architecture, good API design patterns, performance and scale. 
• One who has experience in CI/CD pipelines, Yaml and AWS cloud. 
• One who has experience in Kubernetes, gRPC and go language. 
• One who has experience in concurrency, multi-threading, synchronization, and non-blocking IO.

Equal Opportunities for All

Coupang is an equal opportunity employer. Our unprecedented success could not be possible without the valuable inputs of our globally diverse team.