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Principal Software Engineer (Coupang Media Group)

Seattle, United States

1797903 Aug. 02, 2019 eCommerce

Coupang is one of the largest and fastest growing e-commerce platforms on the planet. We are on a mission to revolutionize everyday lives for our customers, employees and partners. We solve problems no one has solved before to create a world where people ask, “How did we ever live without Coupang?” Coupang is a global company with offices in Beijing, Los Angeles, Seattle, Seoul, Shanghai, and Silicon Valley. 

 Job Overview: 

As our Senior Software Engineer  for Coupang Media Group, you will be responsible for developing, designing the new features for our advertising platform.

Our group is responsible for advertising brands and products inside our ecommerce website. To get an idea of how valuable that is, Alibaba makes 56% of its profits from advertising. This is an opportunity to be part of building up a new development organization with strong revenue potential inside a successful company. We’re building full-stack engineering teams to handle large scale advertising problems, including real-time behavioral targeting, auctioning and bidding systems and search based advertising.

Key technologies you will work with are node.js, express.js, react.js, Postgres, AWS.

Key Responsibilities:  

  • Developing and driving the systems for Coupang Media Group.
  • Implement full stack, high scale production systems with fault-tolerance and monitoring systems
  • Building durable code, with the ability to scale with very large data volumes.
  • Build and implement  design frame work and self-service design
  • Effectively lead and mentor the junior developers
  • Communicate clearly and concisely with the team members, peers and leadership team



  • BS or advanced degree in Computer Science, Computer Engineering, or Electrical Engineering
  • 5+ years of software development experience
  • 4+ experience in building web- based products and large  scale data  infrastructures
  • Strong coding experience in  one of the following :Java, C++/Scala or Python
  • Experience in distributed systems, micro services
  • Experience in one of the following node.js or react.js or express. Js
  • Self-starter and innovator who likes to solve complex problems
  • Proven track record of taking ownership and successfully delivering results
  • Ability to clearly and concisely communicate with technical and non- technical stakeholders across all levels of the organization
  • Ability to work in multi-cultural, cross functional team



  • Experience with advertising systems/Search advertising/Advertising Marketplace
  • Experience with high-scale systems (100k+ tps)
  • Understanding of performance tradeoffs, load balancing and operational issues
  • Experience with service-oriented architecture and web application/services development
  • Experience working with AWS (Amazon web services)
  • Bilingual in Korean and English
  • Experience working in startups
  • Experience with Machine Learning, Elasticsearch.



Coupang is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or gender (including pregnancy, gender identity, gender expression, sexual orientation, transgender status), national origin, age, disability, medical condition, HIV/AIDS or Hepatitis C status, marital status, military or veteran status, use of a trained dog guide or service animal, political activities, affiliations, citizenship, or any other characteristic or class protected by the laws or regulations in the locations where we operate. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at

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  • Software Development Engineers, Seattle, Washington, United StatesRemove