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Senior Staff, Back-end Engineer (Cloud Platform)

Location Seoul, South Korea



Coupang is reimagining the shopping experience with the goal of wowing each customer from the instant they open the Coupang app to the moment an order is delivered to their door. 
 Powered by an outstanding end-to-end e-commerce and logistics network and a fanatical culture of customer centricity, Coupang has broken tradeoffs around speed, selection and price. Today, we provide exceedingly fast shipping speeds on millions of items including fresh groceries, delivered within hours nationwide, 365 days a year. 
We are doing this for millions of consumers in Korea. Korea is home to one of the largest and fastest growing e-commerce opportunities anywhere in the world. 


Job Overview:  

As a  Sr. Staff Backend Engineer , this role will focus on Cloud Platform Infrastructure, Services and processes at its best to enhance Cloud infrastructure reliability & system efficiencies, productivity, availability, scalability and system quality at 10X scale. This role will be responsible for diving deep into business problems, understanding current customer pain points, system domain, current Platform limitations  (if exists)  and then work closely with engineering teams / leaders to design and architect new system / services leveraging cloud infrastructure that can scale 10X better in terms of reliability, availability performance and efficiency. This includes providing system architecture artifacts, accountability on cloud infrastructure choices that can perform and scale at 10X level but are still efficient, guidance on using right machine type, network designs, deployment automation etc. You will be part of a Global team working from different locations but still works as a central connected unit. 


Key Skills and Role Responsibilities:  

  • Self-service code development and end-to-end cloud deployment automation for application tech stack. 
  • Provide a roadmap and vision for scalable and robust growth for cloud infrastructure and platform services to enable achieving 99.999% availability. 
  • Strong technical analytical & design capability to understand common & shared platforms, web, & services API with underlying data to provide appropriate network, infrastructure recommendations 
  • Strong working experience on Kubernetes, Docker, Linux and AWS cloud services integrations. 
  • 100% accountable for the reliable, scalable and optimized cloud architecture, design and platform services. 
  • Serve as Back-end Engineering for Cloud infrastructure Architecture, Design and Deployment and maintenance for highly reliable and scalable applications. 
  • Strong ability to dive deep to understand current cloud infra and systems architecture to provide strategic partnership and improvements on network usage, role management, CDN, domains and cloud infra security. 
  • Analyze complex distributed production deployments and recommend ways to optimize performance and/or automate processes by managing continuous integration servers, utilizing monitoring and testing tools. 
  • Identify opportunities to make disruptive improvements in cloud infrastructure usage, operations and services with high degree of systematic automation. 
  • Possess expert knowledge in performance (sub millisecond latencies), scalability, availability (99.999% uptime), enterprise architecture best practices 
  • Exert technical influence over multiple teams, increasing their productivity and effectiveness by sharing your deep knowledge and experience. 
  • Strong problem-solving skills, analytical capabilities, and attention to details 
  • Provide a roadmap and vision for scalable and robust growth for cloud infrastructure and platform services 
  • Collaborate with customers, stakeholders and lead engineers on key mission-critical projects 



  • 4+ years of solid work with fundamental algorithms, system design, and large distributed systems 
  • 4+ years of coding experience in Java 
  • Experience in Kubernetes, gRPC, Spring boot. 
  • Experience in automating build/test/deploy 
  • Experience with bulk data processing using NoSQL solutions 
  • Experience with Git system for version control 



  • AWS Certification Advance Architecting, Developing on AWS, 
  • Strong hands-on experience on automating App stack deployments through IaC using Tarraform, Python or Go. 
  • 8+ years of hands-on experience as a Cloud Infra and Backend Engineering 
  • Excellent cross-group collaboration and communication skills   
  • Strong understanding of DBs, App Tech stack running cloud platform. 


Recruitment Process & Others  

Recruitment Process   

  • 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.      
  • Coupang does not discriminate against disabled applicants or those with veteran status. We are proud to offer equal opportunities for all applicants.   
  • 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.  


Privacy Notice   


Document Return Policy (This notice MUST be included in a job posting in Korea only to comply with the Fair Hiring Procedure Act.)   

  • This notification is given pursuant to Article 11 (6) of the Fair Hiring Procedure Act.    
  • 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.   
  • 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 the request to the Company (Coupang Recruiting Team, Tower 730, 570 Songpa-daero, Songpa-gu, Seoul). 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.   
  • 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 the end of this period, all of his/her hiring documents will be destroyed immediately in accordance with the Personal Information Protection Act.  


Equal Opportunities for All  

Coupang is an equal opportunity employer. Our unprecedented success could not be possible without the valuable inputs of our globally diverse team.