Sr Staff Backend Engineer -Marketplace Growth

Marketplace Growth Engineering is responsible for building scalable, high-performance backend systems to ensure the success of 3rd party sellers at Coupang. Our mission is to empower sellers by providing robust tools, services, and data platforms that enable them to thrive. We focus on designing intelligent, scalable, and automated systems that enhance the seller experience, improve product listings, and drive business growth.
The team’s work encompasses three primary areas:

1. Collaborating with search and ranking teams to expose features that enhance sellers' visibility and position in search results. 
2. Developing backend services to enhance product listing quality through advanced data processing and analysis of inputs like product images and customer reviews. 
3. Building tools and analytics to help sellers identify opportunities to improve item performance and maximize success.

The ideal candidate is a backend engineering expert with extensive experience in building scalable data systems, excellent problem-solving skills, and the ability to own and drive impactful projects from inception to delivery.
What You Will Do:

• Design, develop, and automate large-scale, high-performance streaming data processing systems to drive business growth and enhance product experiences. 
• Build scalable data infrastructure and pipelines using best-in-class software engineering practices. 
• Develop optimal data models for storage and retrieval, meeting critical product and business requirements. 
• Take full ownership of projects, ensuring high-quality development and operational health. 
• Establish and execute short- and long-term architectural roadmaps to meet evolving business needs. 
• Drive continuous improvements in data platform efficiency, flexibility, and scalability, while maintaining customer trust, performance, and availability. 
• Contribute to shared data engineering tools and standards to enhance productivity and quality across Growth Engineering and Coupang as a whole. 
• Functionally decompose complex problems into straightforward, maintainable solutions. 
• Provide technical leadership across teams, sharing expertise to increase overall productivity and drive technical excellence. 

Basic Qualifications:

• 10+ years of professional software development experience. 
• 5+ years of experience building data-related products with proficiency in Spark, Flink, Spring, and Java. 
• Strong expertise in open-source frameworks and technologies, including Spring, AWS, APIs, NoSQL, and Big Data technologies such as Kafka, Elasticsearch, Iceberg, and ClickHouse. 
• Hands-on experience with Python. 
• Exceptional coding skills, with a focus on data structures, algorithms, problem-solving, refactoring, performance optimization, and complexity analysis. 
• Experience designing, implementing, and maintaining distributed systems at scale, making trade-offs based on business demands. 
• A self-starter mindset, with the ability to thrive in environments with evolving priorities and unclear requirements. 
• Comfortable working in an agile, fast-paced environment. 
• Bachelor's Degree in Computer Science or a related field. 

Preferred Qualifications:

• Proven success in taking a leading role in building and delivering complex software systems. 
• Experience working with internet-scale datasets. 
• Strong communication skills, with the ability to gather requirements and collaborate with users, technical teams, and senior management. 
• Experience influencing software engineering best practices across teams. 
• Hands-on expertise with a wide range of technologies, spanning front-end interfaces to back-end systems. 
• A customer-first mindset, with the ability to work backward from customer needs to deliver innovative, simple solutions. 

This role offers the opportunity to make a significant impact on Coupang’s seller ecosystem, delivering solutions that scale with our business and redefine the seller experience.

Pay & Benefits

Our compensation reflects the cost of labor 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 $159,000/year in our lowest geographic market to $324,000/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 Public 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 actual or perceived race (including traits historically associated with race, including but not limited to hair texture and protective hair styles), color, religion, religious creed (including religious dress and grooming practices), sex or gender (including pregnancy, childbirth, breastfeeding, and medical conditions related to pregnancy, childbirth or breastfeeding), gender identity, gender expression, sexual orientation, ,ancestry, national origin (including language use restrictions), age (40 and over), physical or mental disability, medical condition, genetic information, HIV/AIDS or Hepatitis C status, family status (including but not limited to marital or domestic partnership status), military or veteran status, use of a trained dog guide or service animal, political activities or affiliations, ancestry, citizenship, family and medical leave status, status as a victim of any violent crime, or any other characteristic or class protected by the laws or regulations in the locations where we operate. Coupang is also committed to providing a safe work environment for its employees and its consumers. If you need assistance and/or a reasonable accommodation in the application of recruiting process due to a disability, please contact us at usrecruiting@coupang.com.

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.

Req # R0052561