Staff Backend Engineer - Commerce

Company Introduction

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 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

The Commerce team is responsible for building next-generation cloud commerce systems that power pricing, billing, usage metering, and revenue generation for Coupang’s cloud platform. This team operates as the backbone of the cloud business, enabling accurate pricing, discounting, invoicing, and real-time usage visibility for customers.

The systems are highly scalable and event-driven, ingesting and processing massive volumes of data—including customer usage events and Kubernetes-driven infrastructure signals. As the platform scales from early-stage adoption to large-scale rollout, it is expected to handle exponentially growing workloads, potentially reaching hundreds of millions to billions of events, while maintaining high performance and reliability.

A key focus of this team is building financial-grade systems that ensure accuracy, consistency, and correctness in billing, pricing, and revenue computation. These systems must provide real-time insights to customers while guaranteeing precise accounting of usage and charges.

As a Staff Backend Engineer, you will act as a technical leader, translating complex business requirements into scalable architecture and distributed systems. You will design and build low-latency, high-throughput backend services that can support multi-tenant cloud environments, ensure reliability under rapid growth, and maintain strict correctness in revenue-critical workflows.

What You Will Do

• Design and build scalable backend systems for pricing, billing, and usage metering
• Develop event-driven architectures to process large volumes of real-time usage and infrastructure data
• Build systems that provide real-time visibility into customer usage and billing metrics
• Design components for rate cards, pricing plans, discounting, and multi-currency transactions
• Work on distributed systems that support exponential growth in customers and usage events
• Collaborate with product, infrastructure, and platform teams to build cloud-native commerce capabilities
• Ensure high levels of accuracy, reliability, and scalability in revenue-critical systems
• Contribute to architecture decisions and drive engineering best practices

Basic Qualifications

• 8+ years of backend engineering experience
• Strong proficiency in Java-based backend development
• Experience working with cloud platforms (AWS preferred)
• Experience building event-driven architectures and distributed systems
• Experience designing and scaling high-throughput systems handling large volumes of events
• Experience working with AWS-managed databases (e.g., Aurora or similar OLTP systems)
• Familiarity with containerized systems and Kubernetes ecosystems
• Experience building real-time systems (e.g., usage tracking, billing, metering pipelines)
• Strong understanding of system design, scalability, and reliability principles
• Strong problem-solving skills with focus on efficiency and correctness
• Experience collaborating with cross-functional teams

Preferred Qualifications

• Experience with Golang for backend development
• Deep expertise in AWS ecosystem (compute, storage, distributed services)
• Experience designing large-scale event processing systems (hundreds of millions to billions of events)
• Experience building cloud commerce platforms, billing systems, or pricing engines
• Familiarity with real-time usage metering, invoicing, or revenue systems
• Experience working with Kubernetes-based observability signals (logs, infra events, metrics)
• Exposure to high-growth systems scaling from early stage to large production scale
• Experience building multi-tenant, customer-facing cloud platforms

Type of work model

• Hybrid / Onsite / Remote working

Our Hybrid work model: Coupang hybrid work model is designed to enable a culture of collaboration that acts a catalyst to enrich the experience of employees. Employees are required to work at least 3 days in the office per week, with the flexibility to work from home 2 days a week, depending on the role requirement. Some businesses may require more time in office due to nature of work.

Details to consider

• Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws.

Privacy Notice

• Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. https://privacy.coupang.com/en/l and/jobs/