Staff Backend Engineer, Offsite Ads

We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did we ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we’re collectively disrupting the multi-billion-dollar e-commerce industry from the ground up. We are one of the fastest-growing e-commerce companies that established an unparalleled reputation for being a dominant 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

In Coupang Ads, we build one of the fastest growing advertising platforms based on Coupang’s e-commerce platform. Coupang is investing in building a world-class online marketing business where we run relevant ads and promotions across our website and mobile app. 

Offsite Advertising is a product where we offer the opportunity to integrate advertising beyond Coupang’s website and apps, to Coupang’s affiliate partners and other popular advertising channels in South Korea and beyond, such as Google, Facebook, Naver, Coupang's affiliate partner network and various ad exchange networks. 

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. In this role you will be responsible for innovating and building ad serving systems specific to offsite advertising on ad exchanges and publisher networks. 

What You Will Do

• Design and implement scalable, high-performance workflow infrastructure using technologies such as Temporal and Netflix Conductor.
• Benchmark platform performance, collect and analyze system metrics, and publish performance reports.
• Ensure platform reliability and uptime, targeting high availability through robust monitoring and alerting systems.
• Estimate system capacity and provision clusters to support diverse customer workloads.
• Monitor production systems, respond to incidents, and proactively address root causes to improve operational excellence.
• Analyze and contribute to open-source platform components and codebases.
• Collaborate with cross-functional engineering teams to ensure platform extensibility and support innovation.

Utilize SQL and NoSQL databases (e.g., Cassandra, MySQL) for data storage and retrieval.

Minimum Qualifications

• Bachelor's degree in computer science, Electrical Engineering, Math, or a closely related field
• 6 years of experience in backend software development
• Proficiency in Java and the Spring Framework
• Experience working in cloud environments, particularly AWS
• Demonstrated experience in building and maintaining highly available, distributed systems

Preferred Qualifications

• Strong communication skills for interfacing with technical teams, business stakeholders, and end users
• Familiarity with Agile development practices, including code reviews, testing, and CI/CD pipelines
• Proven ability to lead and collaborate in cross-functional, fast-paced environments
• Experience managing mission-critical services with high throughput and low latency

Pay & Benefits

Our compensation reflects the cost of living across several US geographic markets. At Coupang, your base pay is one part of your total compensation. The base pay for this position ranges from $142,000/year in our lowest geographic market to $309,000/year in our highest geographic market. Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience.

General Description of All Benefits

• Medical/Dental/Vision/Life, AD&D insurance
• Flexible Spending Accounts (FSA) & Health Savings Account (HSA)

• Long-Term/Short-Term Disability

• Employee Assistance Program (EAP) program
• 401K Plan with Company Match
• 18-21 days of the Paid Time Off (PTO) a year based on the tenure
• 12 Paid Holidays
• Paid Parental leave
• Pre-tax commuter benefits
• MTV - [Free] Electric Car Charging Station

General Description of Other Compensation

“Other Compensation” includes, but is not limited to, bonuses, equity, or other forms of compensation that would be offered to the hired applicant in addition to their established salary

range or wage scale.

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, or 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 reasonable accommodation in the recruiting process due to a disability, please contact us at usrecruiting@coupang.com.   

Job Requisition ID: R0062381