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# Sr. Staff Back-end engineer [Promise Platform]

- **Company:** Coupang, Inc.
- **Location:** Seattle, WA, United States
- **Experience:** Expert
- **Salary:** $299,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Distributed Systems, Fault Tolerance, Python (Programming Language), Machine Learning, Software Architecture, Scala (Programming Language), Software Engineering, Warehouse Management Systems, System Availability, Backend, Information Technology, Data Analytics, Apache Kafka, Spark Streaming, Machine Learning Operations, Stream Processing, Data Caching, Microservices
- **Published:** September 16, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=31bcc8c63eb65d77

## About the Role

* Bachelor's degree in Computer Science, Electrical Engineering, Math, or a closely related field
 * 10+ years of experience in backend software development
 * Demonstrated experience in building and maintaining highly available, distributed systems

Preferred:

 * Experience with scalable distributed systems and understanding of machine learning algorithms.
 * Strong understanding of backend scalable software architecture, distributed systems, and message-oriented architecture.
 * Experience with full-stack, high-scale production systems with fault-tolerance and monitoring.
 * Experience with building stream-processing systems, using solutions such as Kafka and Spark-Streaming.
 * Data caching and storage techniques and creating distributed software architectures with horizontal scale.
 * Operationalizing software in a large-scale environment with high availability requirements.
 * Experience in the eCommerce domain involved in supply chain systems around Inventory and Promise.
 * Software development experience with Java, Scala, and Python.
 * Experience with AWS; Java language would be a plus.

## Description

As our Sr. Staff Backend Engineer for the Inventory and Promise Platform team, you will empower Coupang Fulfillment & Transportation to operate faster, better, and cheaper through modern, reliable, and data-driven technologies. In this role, you will be a key contributor to an area of the business that is rapidly expanding and is recognized for its Rocket Delivery service. The team already builds services that process thousands of requests per second, generate trillions of won annually in business decisions, and manage business rules that move millions of products. We are responsible for improving order coordination with technology to deliver products to millions of online shoppers. The role will involve technical leadership on rearchitecting and building a brand new Inventory and Promise platform which powers customer's shopping experience by giving inventory visibility to the customer to be able to order and gives out promised delivery dates for their order. Additionally, the
platform also powers fulfillment orchestration once an order is placed., * Serve as a technical lead on our most demanding, cross-functional projects involving Inventory and Promise.

 * Independently come up with quality architecture and design of systems for new microservices and machine learning pipelines.
 * Functionally decompose complex problems into simple, straightforward solutions.
 * Possess expert knowledge in performance, scalability, enterprise distributed architecture, and engineering best practices.
 * Assist in the career development of others, actively mentoring individuals and the community on advanced technical issues and helping managers guide the career growth of their team members.
 * Exert technical influence over multiple teams, increasing their productivity and effectiveness by sharing your deep knowledge and experience., * Application Review - Phone Interview - Onsite (or Virtual Onsite) Interview - Offer
 * The exact nature of the recruitment process may vary according to the specific job and may be changed due to scheduling or other circumstances.
 * Interview schedules and the results will be informed to the applicant via the e-mail address submitted at the application stage.

Details to Consider

 * This job posting may be closed prior to the stated end date for application if all openings are filled.
 * Coupang has the right to rescind an offer of employment if a candidate is found to have submitted false information as part of the application process.
 * Those eligible for employment protection (recipients of veteran's benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws.