KORUM by worldhire

Staff Back-end Engineer (Global Payments)

Coupang

Industry
Internet
Location
Seoul, South Korea
Work mode
-
Job type
-
Annual salary
Not specified
Minimum experience
7+ years
Posted
19th October, 2026

Required skills

PaymentsFintechMarketplaceLiquidityAccountingTreasuryComputer ScienceComputer EngineeringMathematicsAlgorithmsSystem DesignJava

About the role

Translated into English from Korean by Korum. The employer's original wording is on their site.

Company Introduction

Coupang Pay's fintech business supports Coupang customers and sellers in getting more value for the same cost by redefining financial services.
 
Coupang Pay is committed to providing innovative payment and financial solutions to consumers who buy products on the Coupang app and website, to sellers doing business on the Coupang Marketplace, and to restaurant owners listed on Coupang Eats. Coupang Pay's latest fintech innovations meet the needs of consumers in Korea and Taiwan based on Coupay, its proprietary payment system equipped with a one-touch payment service.
 
Notably, Coupang Pay is rapidly expanding the Coupang WOW Card (a co-branded card exclusive to Coupang), which offers industry-leading rewards in pursuit of customer value. It also actively supports the business growth of small merchants by incorporating a BaaS (Banking as a Service) model for Marketplace sellers and providing a range of liquidity-enhancing solutions.
 
If you want to make the most of your diverse experience in the fintech field, join Coupang Pay. Coupang Pay saves customers as much time as possible on payments and gives them time to shop for whatever they love.

 

Responsibilities

Coupang Pay aims to make Coupang the most convenient site for online payments. As a developer in the Product Engineering team, which is responsible for the various services Coupang Pay provides, you will take part in developing distinctive fintech services and, through code review, deliver more advanced payment services with high-quality code.

Reliably providing and advancing "Coupay", Korea's first one-touch payment system, is also one of the roles of Product Engineering team developers. You will work together to solve problems and develop services so that ten million customers can use an improved payment service. In addition, you will collaborate with the accounting, treasury and fintech development teams to develop and operate the fintech back office, and proactively take part in collaboration with various related departments to offer customers faster and more convenient payment experiences.

 

Qualifications

  • Bachelor's degree or higher in Computer Science, Computer Engineering, Electrical/Electronic Engineering, Mathematics or an equivalent field
  • 7 years or more of experience related to basic algorithms, system design and large-scale distributed systems
  • 7 years or more of experience coding in Java or a similar language
  • Experience designing and building large-scale real-time systems
  • Outstanding ability to deliver software products with appropriate trade-offs in an environment where requirements change rapidly
  • Strong ownership, a fast and proactive way of working, and drive
  • High willingness to learn and desire to grow, quickly learning new domains and technologies
  • Excellent verbal and written communication skills
  • Experience working closely with globally distributed teams

 

Preferred Qualifications

  • Good understanding of JPA and MSA
  • Experience working in the payment domain
  • Experience with large-scale operational systems that include incident management and monitoring functions
  • Familiarity with agile software methodologies
  • Familiarity with reconciliation work on large volumes of data

 

Selection Process and Notices

  • SelectionProcess
    • Document screening - job fit interview - core competency interview - final acceptance
    • The selection process may differ by position and may change depending on schedule and circumstances.
    • Selection schedules and results will be notified individually to the email address registered on your application.
  • Notes
    • This posting may close early once recruitment is complete.
    • If any information in the application is false, the acceptance may be revoked.
    • Employment-protected candidates (veterans, persons with disabilities, etc.) may receive preferential treatment in accordance with applicable laws.
    • Job grade and scope of responsibilities may be changed in consideration of the candidate's overall career and experience. If such a change is necessary, we will communicate with the candidate at an appropriate time before the final acceptance notice.
    • Recruitment may be restricted if the legal qualifications required for recruitment and performance of the job are not met.
    • Employment is permanent, with a probation period of 12 weeks included. However, where required for business reasons, the above probation period may not apply or may be shortened or extended.  

Privacy Policy 

  • The Coupang Group collects and processes your personal data in accordance with its Applicant Personal Data Processing Policy (link below). https://www.coupang.jobs/kr/privacy-policy/

Document Return Policy 

  1. This notice is given pursuant to Article 11(6) of the Act on Fair Hiring Procedures.
  2. Applicants who have applied to us and were not finally accepted may request the return of the recruitment documents they submitted, in accordance with the Act on Fair Hiring Procedures. However, this does not apply to documents submitted via our website or by email, or to documents voluntarily submitted without our request; and if recruitment documents are lost due to natural disasters or other reasons not attributable to us, they are deemed returned.
  3. Applicants requesting the return of recruitment documents under paragraph 2 above must complete a return request form [Form No. 3 of the Enforcement Rules of the Act on Fair Hiring Procedures] and submit it by email ([contact details removed]); the documents will be sent by registered mail to the address specified within 14 days of confirmation of submission. In this case, the registered postage is payable by the recipient, so please note this. 
  4. To prepare for return requests under paragraph 2 above, we will keep the original recruitment documents submitted by applicants for 180 days from the date the hiring decision is confirmed; if no return is requested by then, all recruitment documents will be destroyed without delay in accordance with the Personal Information Protection Act.
  5. However, paragraphs 1 to 4 above apply only where the labour laws of the Republic of Korea apply. Otherwise, they do not apply.

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