Senior Back-end Engineer (Cloud Infrastructure Automation)

Korean text will follow English

Company Introduction We exist to wow our customers. We know we're doing the right thing when we hear our customers say, "How did I ever live without Coupang?" Born out of an obsession to make shopping, eating, and living easier than ever, we are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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 As a Senior Back-end Engineer, you will architect, design, and scale core backend services and cloud platform infrastructure capable of supporting 10X business growth, 99.999% availability, and sub-millisecond latencies.

You will dive deep into complex domain problems, collaborate with engineering leaders across global locations, and build self-service, resilient backend systems. In this high-impact role, you will combine hands-on technical execution with engineering leadership to drive continuous operational excellence.

What You Will Do

• Design, build, and maintain high-performance, highly available, and scalable backend services to support 10X scale.
• Architect resilient distributed systems and APIs capable of handling massive concurrency with sub-millisecond latencies.
• Define technical vision and system architecture leveraging cloud infrastructure to achieve 99.999% availability.
• Develop self-service platform tools and end-to-end cloud deployment automation using Terraform, Python, or Go.
• Optimize CI/CD pipelines, containerized environments (Kubernetes, Docker), and automated testing/monitoring systems.
• Identify system performance bottlenecks, optimize cloud infrastructure usage, and enforce security and networking best practices.
• Solve complex technical problems across Public Cloud (AWS, GCP, Azure) and Hybrid Cloud environments.
• Exert technical influence across multiple engineering teams through mentorship, architectural reviews, and continuous knowledge sharing.

Basic Qualifications

• Bachelor’s or Master’s degree in Computer Science or a related technical field (or equivalent practical experience).
• 5+ years of hands-on experience in backend engineering and building large-scale distributed systems in production.
• Strong proficiency in modern backend programming languages such as Go, Python, Java, or C++.
• Proven experience in system design and architecture using public cloud services (AWS, GCP, or Azure).
• Deep technical expertise in Kubernetes, Docker, Linux internals, and Infrastructure as Code (IaC) tools like Terraform.
• Demonstrated track record of delivering backend systems requiring 99.999% uptime and low-latency performance.
• Hands-on experience with database management (SQL/NoSQL), automated CI/CD deployment pipelines, and microservices architecture.
• Exceptional problem-solving skills, analytical capability, and strong cross-functional collaboration and communication skills.

Recruitment Process and Others

Recruitment Process • Application Review - 1st Interview - 2nd 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. • Job titles and responsibilities may be subject to change depending on the candidate's overall experience, etc. This will be communicated to the candidate at the appropriate time before the offer. • Hiring may be restricted in case the legal qualifications required for hiring and work performance is not met. • This is a full-time regular position and includes 12 weeks of probation period; provided, however, the probationary period may be either skipped, shortened or extended if necessary for business purposes.

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/land/jobs/

Document Return Policy 1. This notification is given pursuant to Article 11 (6) of the Fair Hiring Procedure Act. 2. A job applicant, who has applied but not been finally selected for a position at Coupang (the "Company"), may request the Company to return his/her hiring documents submitted pursuant to the Fair Hiring Procedure Act. However, this will not apply where the hiring documents were submitted via the website of the Company or e-mail, or where the job applicant submitted those documents voluntarily without a request from the Company. In addition, if the hiring documents were destroyed due to a natural disaster or any other reasons not attributable to the Company, such documents will be deemed to have been returned to the job applicant. 3. A job applicant who wishes to request the return of his/her hiring documents pursuant to the main sentence of paragraph 2 above should fill out a "Request for Return of Hiring Documents" [Annex Form No. 3 in the Enforcement Rule of the Fair Hiring Procedure Act] and submit It by email ([email removed]). In such case, within fourteen (14) days from the date of identifying the receipt of the request, the Company will send the hiring documents to the job applicant's designated address via registered mail. Please be informed that the job applicant is required to pay the postage on the registered mail. 4. In preparation for a job applicant's request for the return of hiring documents pursuant to the main sentence of paragraph 2 above, the Company shall retain the original hiring documents submitted by the job applicant for 180 days from the completion of the recruiting process. If no request is made until