Sr. Staff Backend Engineer

Overview

Sr. Staff Backend Engineer on the Marketplace Growth Engineering team, building scalable, intelligent systems and data platforms that power the third-party seller experience on Coupang.

What you'll 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.

What you'll need

• Bachelor's degree in computer science, Electrical Engineering, Math, or a closely related field.
• 8 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.

Nice to have

• 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.
• 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.
• 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.

Details

• Location: Seattle, USA.
• Base pay ranges from $159,000/year to $324,000/year, based on several factors including market location, job-related knowledge, skills and experience.
• Annual bonus of 0-20% of base salary.
• This is an internal transfer opportunity; apply using the Internal Transfer Request Form with your Coupang email address.