Site Reliability Engineer (Staff / Senior Staff)

Seoul (On-site) • Full time

  • Python
  • Java
  • Ruby
  • Go
  • SRE

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.

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.

About the Role:

Site Reliability Engineers (SREs) at Coupang is a mission-critical role which combines software and system engineering to build, run and scale our complex, large-scale ecommerce systems. As part of the Site Reliability Engineering team, you will be responsible for ensuring all our customer facing services are healthy, monitored, automated, and designed to scale. As SRE organization we take pride in handling “operations as an engineering” problem with automation first approach. You will use your background to build best in class infrastructure automation for areas such as Observability, Incident management, Disaster Recovery, Load testing, Capacity engineering and many more. In this role you will work very closely with our product development teams from an early stage of design to all the way helping resolve any production incidents, maintaining SLI/SLA bar for production services and influencing them with SRE principles and best practices. If you take pride in complete ownership, have a passion for solving complex technical challenges for large scale distributed systems and demeanor to work and communicate effectively across team boundaries, this is the role for you!

Key Responsibilities:

  • Serve as a primary point responsible for the reliability, health, and performance of all Coupang customer-facing services.
  • Gain deep knowledge of Coupang application workflow and dependencies.
  • Define and track key performance indicators (KPIs) and service-level objectives (SLOs) related to system availability, performance, and reliability.
  • Build world class incident management process and automation, including fast incident remediation, incident operational reviews and retrospectives.
  • Develop and implement best practices for creating and maintaining effective monitoring, alerting, and telemetry systems.
  • Build automation to execute regular Disaster Recovery testing and load testing to stay ahead of expected growth of Coupang services.
  • Work closely with product development teams to ensure the products are designed with scale and operability in mind.
  • Build right guardrails and automation for deploying production changes holding the reliability bar.
  • Participate in a 24x7 rotation for production issue escalations, functions well in a fast-paced environment. Communicate effectively with people at all levels of the organization.

Essential Qualifications:

  • 5+ years of industry experience building and operating large scale distributed systems.
  • Deep UNIX/Linux systems knowledge and administration background.
  • Demonstrated programming skills in one or more of: Python, Java, Golang, Ruby.
  • Strong problem-solving and analytical skills spanning systems, network (TCP/IP) and code, with a focus on data-driven decision-making.
  • Experience with cloud-based infrastructure, including AWS, Azure, or Google Cloud Platform.
  • Strong understanding of DevOps and SRE practices, including continuous integration, continuous delivery, and infrastructure as code (IaC).
  • Experience with containerization and orchestration technologies, such as Docker and Kubernetes.
  • Excellent communication and collaboration skills, with the ability to work with teams across distinct functions and technical domains.
  • Knowledge of observability ecosystem including metrics, logging, tracing and tools, such as Prometheus, Grafana, Elastic Stack, Datadog, or New Relic.

Preferred Qualifications:

  • Bachelor's degree in computer science, Engineering, or a related technical field.
  • Prior experience working with large scale web-based Java architectures and JVM configuration.
  • Professional certifications in cloud platforms, monitoring tools, or related technologies.
  • Previous experience working on a large-scale ecommerce platform.