Staff Backend Engineer ( Cassandra)

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

The Coupang Corner Stone team in the application infrastructure organization, takes charge of company-wide transaction data storage and common data service layer to materialize e-commerce data for low latency reading. The Storage and Tools team owns the storage services like Cassandra, Elastic Search, MySQL, Vitess and Clickhouse, providing storage services through in-house hosted open-source technology.

We are looking for software development engineers with Cassandra experience. As a Staff Engineer, you are the domain expert in Cassandra to handle the Cassandra usage problem, Cassandra performance optimization, Cassandra cluster setup, and Cassandra client SDK development. Besides that, you are the Go-To person when the domain team needs to make the storage solution chosen, and provide Cassandra based storage solutions to meet business requirements.

What You Will Do

• Hand on to develop the features to enhance the system availability, disaster recovery and performance enhancement


• Dive deep into the system and fix complex technical problems.


• Participate in the daily system operation to address system issues and answer customers’ questions.


• Identify the system's reliability and performance issues and propose solutions with the best industry practice.


• Work with the team manager to define the tech and project road map.


• Collaborate with other Coupang tech teams to make the service extensible to support business growth


• Drive communication up to Principal Engineer and Senior director level.


• Advocate engineer excellence and operation excellence with the team


• Hire and develop team members with knowledge sharing and high-quality interviews.

Minimum Qualifications

• 4 years of relevant industry experience with distributed systems, system programming and backend development with Cassandra expertise.


• 4 years of solid work with fundamental algorithms, system design, and large distributed systems. 


• Bachelor's degree in Computer Science or equivalent

Preferred Qualifications

• Bachelor’s degree in computer science, Engineering, or related field


• Expert in Cassandra configuration, usage and operation


• Work as Platform or infrastructure engineer on database or storage services


• Familiar with AWS technology


• Solid system and code debugging skills


• Deep understanding in service availability, scalability, and latency.


• Excellent communication skills in English including verbal and written


• Have experience on TiDB management is a plus


• At least 6+ years working experience on software design & development experience on distributed system and experience developing large scale enterprise

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 $138 , 000/year in our lowest geographic market to $297,000/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 [email protected].