Backend Engineer, Engineering

Company Introduction

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.

In Growth Engineering, our goal is to increase the number of transacting Customers while also growing their purchase frequency and lifetime value. We build core platforms and services that power Coupang's growth and marketing efficiency. Various platforms under our portfolio include Search Advertising Platform, Affiliate Platform, Display targeting & re‑targeting Platform, CRM, Audience Platform, Push Marketing Platform, and other core marketing services for user profile, landing, tracking & attribution.

ML opportunities across these portfolios include targeting, personalization, product & offer recommendations, budget optimization, real‑time bidding, creative optimization, fraud detection, and various others.

As a Staff Engineer within Coupang’s Growth Engineering team, you will be instrumental in architecting and developing a next‑generation data platform (Marketing Data Service) designed to seamlessly integrate and process online/real‑time, near‑real‑time, and various data streams. This platform will prioritize low‑latency processing to transform raw data into a robust, user‑centric feature store, enabling high‑performance machine learning model training and real‑time online inference serving.

Furthermore, you will lead initiatives to ensure the platform delivers a dynamic online user profile, offering granular user attribute insights to empower downstream services across the Growth Engineering ecosystem. Your expertise will directly contribute to advancing Coupang’s data‑driven capabilities, aligning technical innovation with strategic business objectives.

• Design, develop, and automate large‑scale, high‑performance streaming data processing systems to drive business growth and enhance product experience
• 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
• Ensure the platform supports high availability, reliability, and low‑latency
• Take full ownership end to end: from solution investigation/benchmark, development to operational health
• Establish and execute short and long‑term architectural roadmaps
• Drive continuous improvement to the efficiency and flexibility of the data, platform, and services while maintaining a high bar for customer trust, performance, and availability
• Collaborate with data scientists, machine learning engineers, and other stakeholders to understand data requirements and deliver solutions
• Implement data quality and validation processes to ensure the accuracy and consistency of ingested data

• 6+ years of professional software development experience
• 5+ years of experience in data‑related products with proficiency in Spark, Flink, Spring, and Java
• Experience with open‑source frameworks and technologies, like Spring, AWS, APIs, No
  
  SQL, Big Data…