Sr. Staff Software Engineer [Gateway Services, Backend]

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?” 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 entrepreneurial 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.Job Overview:The Gateway Services team is responsible for building Coupang’s infrastructure layer in a distributed microservices architecture for service-to-service communication including discovery, load balancing, failure recovery, metrics and monitoring. Develop and implement enterprise-wide fine-grained control of traffic behavior with rich routing rules, retries, failovers, and fault injection. Use management plane for managing the policy layer. Manage a pluggable policy layer and configuration API supporting access controls, rate limits and quotas. Secure service-to-service communication in a cluster with TLS encryption, strong identity-based authentication and authorization.We are looking for an engineer who has deep understanding of app in a distributed system, hands-on experiences in managing, using, Identiy provider, Kubernetes, gRPC and service mesh. You will be responsible for designing the architecture and driving the team to deliver a modern platform that powers all Coupang’s internal services.  What You Will DoAs a Staff Software Engineer in the Service Mesh’s platform team, you will gather requirements, design, build features to enhance multiple platform teams application traffic routing. You will work closely with the Coupang’s domain teams. Implement simple solutions to solve 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 Istio, Envoy, JAVA, AWS, Kafka, Kubernetes, gRPC and service mesh. You will be accountable for raising the bar on engineering and operational excellence.In this role, you will:Design, build service mesh components while collaborating actively as part of a small, highly talented team.Write back-end APIs using REST/GraphQL/Hibernate using the Springboot 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.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.QualificationsOne who has bachelor’s degree in computer science or related technical fields. One who has 8+ years professional software development experience, or 6 years’ experience with advanced degree.  One who has 2+ years’ experience of project tech lead. Experience with configuring, maintaining Identiy 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 QualificationsStrong experience with at least one of server-side webapp frameworks: Springboot.Working knowledge of databases, cache systems like redis, infinispan, QuarkusKnowledge of OIDC, Oauth2, FIDO protocols. Experience with tools like WSO2, Keycloak are highly helpfulDeep 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. Pay & BenefitsOur 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 $159,000/year in our lowest geographic market to $324,000/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 BenefitsMedical/Dental/Vision/Life, AD&D insuranceFlexible Spending Accounts (FSA) & Health Savings Account (HSA)Long-term/Short-term DisabilityEmployee Assistance Program (EAP) program401K Plan with Company Match18-21 days of the Paid Time Off (PTO) a year based on the tenure12 Public HolidaysPaid Parental leavePre-tax commuter benefitsMTV - [Free] Electric Car Charging StationGeneral 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 actual or perceived race (including traits historically associated with race, including but not limited to hair texture and protective hair styles), color, religion, religious creed (including religious dress and grooming practices), sex or gender (including pregnancy, childbirth, breastfeeding, and medical conditions related to pregnancy, childbirth or breastfeeding), gender identity, gender expression, sexual orientation, ,ancestry, national origin (including language use restrictions), age (40 and over), physical or mental disability, medical condition, genetic information, HIV/AIDS or Hepatitis C status, family status (including but not limited to marital or domestic partnership status), military or veteran status, use of a trained dog guide or service animal, political activities or affiliations, ancestry, citizenship, family and medical leave status, status as a victim of any violent crime, or any other characteristic or class protected by the laws or regulations in the locations where we operate. Coupang is also committed to providing a safe work environment for its employees and its consumers.  If you need assistance and/or a reasonable accommodation in the application of recruiting process due to a disability, please contact us at   usrecruiting@coupang.com  .  Equal Opportunities for AllCoupang is an equal opportunity employer. Our unprecedented success could not be possible without the valuable inputs of our globally diverse team.Req # R0043668