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MSA 환경에서 대규모 트래픽과 초고가용성(High Availability)을 보장하기 위해 시스템 아키텍처를 설계하고 구현했던 경험을 구체적인 사례와 함께 설명해 주십시오. 특히 장애 발생 시 복구 전략에 대해 말씀해 주십시오.

🎯 대규모 트래픽 환경에서 MSA 기반의 시스템 안정성과 고가용성을 확보하는 설계 능력을 확인하려는 것

배송 경로 최적화 알고리즘을 개발하여 비용 효율성과 배송 속도를 동시에 개선했던 프로젝트를 설명해 주십시오. 어떤 규칙 기반 로직을 사용했고, 실제 운영 환경에서 어떤 수치적 개선(KPI)을 달성했는지 구체적인 숫자를 제시해 주십시오.

🎯 단순 코딩 능력을 넘어, 비즈니스 목표(비용/속도)를 수학적/알고리즘적으로 해결하고 성과를 낸 경험을 확인하려는 것

여러 도메인(예: 주문, 재고, 배송)에 걸친 시스템 통합 과정에서 발생했던 기술적 의존성(Dependency) 충돌을 어떻게 해결하고 전체 시스템의 일관성을 유지했는지 협업 과정을 중심으로 설명해 주십시오.

🎯 복잡한 엔터프라이즈 환경에서 여러 시스템 간의 복잡한 통합과 데이터 일관성을 관리하는 시스템 설계 및 협업 능력을 확인하려는 것

대용량 데이터 처리 시 성능 병목 현상을 해결하기 위해 Redis나 Memcached와 같은 NoSQL 기술을 적용했던 경험을 설명해 주십시오. 특히 캐싱 전략을 수립하고 데이터 일관성을 어떻게 관리했는지 구체적인 처리량(Throughput) 개선 수치를 제시해 주십시오.

🎯 대규모 데이터 환경에서 성능 최적화를 위해 적절한 인프라 기술(NoSQL)을 선택하고 이를 통해 실제 성능을 어떻게 개선했는지 확인하려는 것

Staff 레벨로서 팀 내에서 기술적 방향을 제시하고 개발 프로세스(Build/Test/Deployment Automation)를 개선하기 위해 주도적으로 변화를 이끌었던 사례를 말씀해 주십시오. 그 결과 팀의 개발 속도나 코드 품질이 얼마나 향상되었는지 측정 가능한 성과를 제시해 주십시오.

🎯 단순 실무자를 넘어, 기술 리더십을 발휘하여 조직 전체의 생산성과 품질을 향상시킨 경험과 책임감을 확인하려는 것

질문만 읽으면 컨닝이에요. 소리 내어 답해보세요 — 어디서 틀어지는지 짚어드립니다.

공고 내용

Korean text follows English

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 are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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 at since our inception. We are all entrepreneurial 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 Global Operations Tech (GOT) organization is responsible for the systems that enable Coupang to reliably deliver to customers within hours of orders being placed. GOT is on a mission to innovate logistics by building an efficient delivery network at breakthrough scale and speeds. As a Staff Backend Engineer in GOT, you will leverage advanced algorithms to improve Coupang’s customer experience by ensuring ultra-fast deliveries are on time even during the busiest times of the year.

What You Will Do

· Design and develop system architecture for Global Operations Technology to ensure stable operations.

· Develop front/back office web services based on the Java platform.

· Identify dependencies across multiple domains and develop system integrations.

· Evaluate and adopt new technologies to enable efficient development and operations.

· Implement optimization algorithms to find the most cost-effective and fastest delivery methods based on rule-based logic.

Qualifications

· Experience developing web applications using Java and Spring Framework.

· 7+ years of programming experience.

· 5+ years of hands-on experience in web application development and operations, or equivalent capabilities.

· Interest in experiencing Coupang’s global-level logistics systems and diverse domains.

· Passion for developing high-availability systems that handle large-scale traffic in a microservices architecture (MSA) environment.

Preferred Qualifications

· Experience or understanding of microservices architecture-based system development.

· Experience or understanding of service development and operations in cloud environments.

· Experience with asynchronous event-driven architecture for large-scale processing.

· Experience improving code quality through development best practices.

· Experience with ORM tools such as JPA or Hibernate and domain modeling.

· Experience developing e-commerce services.

· Experience with build/test/deployment automation.

· Experience handling large-scale data using NoSQL technologies (e.g., Memcached, Redis).

Recruitment Process and Others

Recruitment Process

· Application Review - Phone Interview - Onsite (or Virtual Onsite) Interview – Offer

· The exact nature of the recruitment process may vary according to the specific job and may be changed due to scheduling or other circumstances.

· Interview schedules and the results will be informed to the applicant via the e-mail address submitted at the application stage.

Details to Consider

· This job posting may be closed prior to the stated end date for application if all openings are filled.

· Coupang has the right to rescind an offer of employment if a candidate is found to have submitted false information as part of the application process.

· Coupang does not discriminate against disabled applicants or those with veteran status. We are proud to offer equal opportunities for all applicants.

· Hiring may be restricted in case the legal qualifications required for hiring and work performance is not met.

· This is a full-time regular position and includes 12 weeks of probation period; provided, however, the probationary period may be either skipped, shortened or extended if necessary for business purposes.

Privacy Notice

· Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice is located below.

· https://privacy.coupang.com/en/land/jobs/

Document Return Policy

· This notification is given pursuant to Article 11 (6) of the Fair Hiring Procedure Act.

· A job applicant, who has applied but not been finally selected for a position at Coupang (the “Company”), may request the Company to return his/her hiring documents submitted pursuant to the Fair Hiring Procedure Act. Howev

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