Senior Back-end Engineer (Messaging and Caching Platform)

Coupang · Seoul, South Korea

  • Senior
  • Full-time
  • Posted 2026-08-21
  • Confirmed live on 13 October 2026

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Job description

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 Backend Engineer in Messaging and Caching Platform (MCP) team, you will be responsible for designing and building solid infrastructure to construct, monitor and manage blaze-fast and consistent platform services. Your core mission is to provide company-wide and generic platform solutions with super high scalability, reliability and availability to unleash the productivity of Customer teams. You will have significant scope, impact and responsibility in shaping the future of Coupang platform services. You will be working in a friendly, synergistic, passionate and sharp team.

What You Will Do

• Architect and build Coupang's Messaging and Caching Platform

• Write durable code with the ability to process tera-bytes and peta-bytes each day.

• Keep improving our platform stability, performance and achieving 99.99% to 99.999% availability with smooth operations.

• Work closely with Coupang internal and external Customers and wow them with our cutting-edging products.

Basic Qualifications

• BS or advanced degree in Computer Science/Engineering, Information Systems or related technical field

• Business level of English

• 5+ years of experience in designing, developing and maintaining large-scale software infrastructures

• Solid (AWS) cloud background on both software development and operations

• Expertise in distributed systems and computing frameworks like Kafka, Spark,etc.

• Team player and fast learner with the ability to quickly triage and troubleshoot
complex problems

• Strong ownership and be passionate about applying new technologies to real
products

Recruitment Process and Others

Recruitment Process
• Application Review - Job Fit Interview - Focus 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

Interview problems reported for Coupang

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