Senior Staff Back-end Engineer (New Fintech Product)

English will follow Korean text 회사 소개 쿠팡에서 분사한 쿠팡페이는 늘어나는 쿠팡 고객의 니즈에 부응하기 위해 편리한 결제 및 금융서비스를 제공하는 회사입니다. 쿠팡페이는 Coupang 및 쿠팡이츠에서 물건을 구매하는 고객부터 쿠팡의 오픈마켓을 이용하는 판매자 그리고 쿠팡이츠 가맹점까지 쿠팡의 플랫폼을 이용하는 모든 이들에게 혁신적인 결제 및 금융 서비스 솔루션을 제공하는 데 중점을 두고 있습니다. 원터치 결제 서비스를 개발하여 사용자의 경험을 최상으로 끌어 올렸으며, 쿠팡 플랫폼 이용 고객을 대상으로 더 편리하게 결제를 할 수 있도록 나중결제라는 서비스를 런칭하였습니다. 쿠팡페이 직원들은 누구보다 풍부한 핀테크 분야의 경험을 쌓고 있고, 금융과 기술을 결합한 새로운 기회를 개척하고 있습니다. 쿠팡페이는, 1. Wow the Customer: 고객의 신뢰를 신성하게 생각하고, 고객의 경험 가치를 최우선 합니다. 2. Dive Deep: 사소한 문제란 없습니다. 문제 해결에 집중하며, 문제되는 사안을 꼼꼼히 검토합니다. 3. Move with Urgency: 실행 속에서 답을 찾고 결정을 미루는 행동은 하지 않습니다. 자유로운 업무 환경에서 주도적이고, 발전적으로 업무 하길 기대하시나요? 그렇다면 쿠팡페이의 여정에 함께 하세요.   직무 소개 쿠팡페이는 쿠팡을 온라인 결제가 가장 편리한 플랫폼으로 만드는 것을 목표로 합니다. Product Engineering 팀의 Senior Staff, Back-end Engineer로서, 단순한 기능 개발을 넘어 결제 핵심 도메인의 기술적 방향성을 정의하고, 대규모 트래픽을 처리하는 안정적인 핀테크 시스템을 설계·고도화하는 역할을 담당합니다. 국내 최초 원터치 결제 시스템인 “쿠페이”를 포함한 결제 핵심 서비스의 기술적 오너로서, 시스템의 안정성, 확장성, 보안, 성능 전반에 대해 책임을 집니다. 수천만 고객이 사용하는 결제 서비스를 더 빠르고 안전하게 만들기 위해 복잡한 기술적 문제를 정의하고, 근본적인 해결책을 설계 및 구현합니다. 또한 회계팀, 자금팀, Fintech 개발팀 등 다양한 유관 부서와 긴밀히 협업하며, 결제 백오피스 및 정산·대사 시스템의 아키텍처를 주도적으로 설계하고 운영 안정성을 개선합니다. 코드 리뷰, 설계 리뷰, 기술 가이드 제공을 통해 팀과 조직 전반의 기술 수준을 끌어올리는 핵심 기여자 역할을 수행합니다.   자격 요건 * Backend 개발 경력 15년 이상을 보유하신 분 * Java/Kotlin, Spring Framework 기반의 대규모 분산 시스템을 설계하고 운영한 경험을 보유하신 분 * 하나 이상의 복잡한 서비스 또는 도메인에 대해 기술적 오너십을 가지고 주도적으로 개선한 경험을 보유하신 분 * 성능, 안정성, 데이터 정합성, 보안을 고려한 시스템 설계 역량을 보유하신 분 * 모호한 문제를 구조화하고, 기술적 판단을 통해 실제 비즈니스 임팩트를 만들어낸 경험을 보유하신 분 * 고객 경험과 비즈니스 요구를 이해하고, 이를 기술적으로 풀어내는 데 높은 흥미와 책임감을 보유하신 분 우대 사항 * JPA, MSA 환경에서의 아키텍처 설계 및 마이그레이션 리딩 경험을 보유하신 분 * Payment / Fintech 도메인에서의 개발 및 운영 경험을 보유하신 분 * 대규모 트래픽 환경에서의 장애 대응, 모니터링, SLA 개선 경험을 보유하신 분 * 정산·대사 등 대용량 데이터 처리 및 정합성 보장 경험을 보유하신 분  * 애자일 소프트웨어 방법론 환경에서 기술적 리더십을 발휘한 경험을 보유하신 분 * 기술적 판단과 설계를 통해 조직 내 다른 엔지니어들에게 영향력을 행사한 경험을 보유하신 분   전형 절차 및 안내 사항 전형절차   * 서류전형 - 1차 면접 - 2차 면접 - 최종 합격   * 전형절차는 직무별로 다르게 운영될 수 있으며, 일정 및 상황에 따라 변동 될 수 있습니다.   * 전형 일정 및 결과는 지원서에 등록하신 이메일로 개별 안내 드립니다.   참고사항   * 본 공고는 모집 완료 시 조기 마감될 수 있습니다.   * 지원서 내용 중 허위사실이 있는 경우에는 합격이 취소될 수 있습니다.   * 취업 보호 대상자(보훈대상자, 장애인 등)는 관련 법률에 따라 채용우대를 받을 수 있습니다.  * 직급과 담당 업무 범위는 후보자의 전반적인 경력과 경험 등 제반사정을 고려하여 변경될 수 있습니다. 이러한 변경이 필요할 경우, 최종 합격 통지 전 적절한 시기에 후보자와 커뮤니케이션 될 예정입니다.   * 채용 및 업무 수행과 관련하여 요구되는 법령상 자격이 갖추어지지 않은 경우 채용이 제한될 수 있습니다 .  * 고용형태는 정규직으로 수습기간 12주를 포함합니다. 단, 업무상 필요한 경우에는 상기 수습기간을 적용하지 않거나 단축 또는 연장할 수 있습니다.    개인정보 처리방침  * 쿠팡 그룹은 입사지원자 개인정보 처리방침(아래 링크)에 따라 귀하의 개인정보를 수집하여 처리합니다.   * https://www.coupang.jobs/kr/privacy-policy/ [https://www.coupang.jobs/kr/privacy-policy/]   서류반환정책   1. 본 고지는 『채용절차의공정화에관한법률』 제11조제6항에 따른 것 입니다.   2. 당사 채용에 응시한 구직자 중 최종 합격이 되지 못한 구직자는 『채용절차의 공정화에 관한 법률』에 따라 제출한 채용서류의 반환을 청구할 수 있음을 알려 드립니다. 다만, 홈페이지 또는 전자우편으로 제출된 경우나 구직자가 당사의 요구 없이 자발적으로 제출한 경우에는 그러하지 아니하며, 천재지변이나 그 밖에 당사에게 책임 없는 사유로 채용서류가 멸실된 경우에는 반환한 것으로 봅니다.   3. 위2항 본문에 따라 채용 서류 반환 청구를 하는 구직자는 채용 서류 반환 청구서 [채용절차의 공정화에 관한 법률 시행규칙 별지 제 3 호 서식]를 작성하여 이메일 (recruitingops@coupangpay.com)로 제출하면, 제출이 확인된 날로부터 14 일 이내에 지정한 주소지로 등기우편을 통하여 발송해 드립니다. 이 경우 등기우편요금은 수신자 부담으로 하게 되오니 유념하시기 바랍니다.   4. 당사는 위2항 본문에 따른 구직자의 반환 청구에 대비하여 채용 여부가 확정된 날로부터 180 일간 구직자가 제출한 채용서류 원본을 보관하게 되며, 그때까지 채용서류의 반환을 청구하지 아니할 경우에는 『개인정보 보호법』에 따라 지체 없이 채용서류 일체를 파기할 예정입니다.   5. 단, 위 1항 내지 4항의 내용은 대한민국의 노동 관계 법령이 적용되는 경우에만 적용됩니다. 그 이외의 경우에는 적용되지 않습니다.    ---------------------------------------------------------------------------------------------------------------------------------- Company Introduction Coupang Pay, a spin-off from Coupang, provides convenient payment and financial services to meet the growing needs of Coupang customers. Coupang Pay focuses on delivering innovative payment and fintech solutions to everyone using the Coupang platform—from customers purchasing on Coupang and Coupang Eats, to sellers on Coupang’s open marketplace, and merchants partnered with Coupang Eats. By developing Korea’s first one-touch payment service, Coupay, Coupang Pay significantly enhanced the customer experience. The company also launched a “Buy Now, Pay Later” service to enable even more seamless payments for Coupang users. Coupang Pay employees are building deep expertise in the fintech domain while creating new opportunities at the intersection of finance and technology.   At Coupang Pay, we value: * Wow the Customer: We treat customer trust as sacred and prioritize customer experience above all else. * Dive Deep: No problem is too small. We focus on problem-solving and examine issues with rigor and attention to detail. * Move with Urgency: We seek answers through execution and do not delay decisions. If you’re looking for an environment where you can work autonomously, take ownership, and grow continuously, join us on Coupang Pay’s journey.   Role Overview   Coupang Pay aims to make Coupang the most convenient online payment platform. As a Senior Staff Backend Engineer on the Product Engineering team, you will go beyond feature development to define the technical direction of core payment domains and design and evolve highly reliable fintech systems that handle large-scale traffic. As the technical owner of core payment services—including Coupay, Korea’s first one-touch payment system—you will be responsible for system stability, scalability, security, and performance end to end. You will identify complex technical challenges and design and implement fundamental solutions to make payment services used by tens of millions of customers faster and safer. You will also work closely with cross-functional partners such as Accounting, Treasury, and other Fintech engineering teams to lead the architecture of payment back-office systems, as well as settlement and reconciliation platforms, while improving operational stability. In addition, you will act as a key contributor in elevating the technical bar across the organization through code review, design review, and technical guidance.   Basic Qualifications * 15+ years of backend engineering experience  * Ability to design and operate large-scale distributed systems based on Java/Kotlin and the Spring Framework * Experience owning and proactively driving improvements for one or more complex services or domains with strong ownership * Ability to design systems with strong consideration for performance, reliability, data consistency, and security * Experience structuring ambiguous problems and making technical decisions that resulted in tangible business impact * Ability to understand customer experience and business requirements and translate them into well-architected technical solutions with a high level of ownership Preferred Qualifications * Experience leading architecture design and migration in JPA- and MSA-based environments * Experience in development and operations within the Payment / Fintech domain * Experience responding to incidents, building monitoring systems, and improving SLAs in high-traffic environments * Experience handling large-scale data processing with strong guarantees around settlement and reconciliation accuracy * Experience demonstrating technical leadership in agile software development environments * Experience influencing other engineers through sound technical judgment and system design decisions   Recruitment Process and Others Recruitment Process   * Application Review - 1st Interview - 2nd 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. * Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws.   * Job titles and responsibilities may be subject to change depending on the candidate’s overall experience, etc. This will be communicated to the candidate at the appropriate time before the offer. * 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 located below.   * https://privacy.coupang.com/en/land/jobs/ [https://privacy.coupang.com/en/land/jobs/]   Document Return Policy 1. This notification is given pursuant to Article 11 (6) of the Fair Hiring Procedure Act.   2. 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. However, this will not apply where the hiring documents were submitted via the website of the Company or e-mail, or where the job applicant submitted those documents voluntarily without a request from the Company. In addition, if the hiring documents were destroyed due to a natural disaster or any other reasons not attributable to the Company, such documents will be deemed to have been returned to the job applicant.   3. A job applicant who wishes to request the return of his/her hiring documents pursuant to the main sentence of paragraph 2 above should fill out a “Request for Return of Hiring Documents” [Annex Form No. 3 in the Enforcement Rule of the Fair Hiring Procedure Act] and submit It by email (recruitingops@coupangpay.com). In such case, within fourteen (14) days from the date of identifying the receipt of the request, the Company will send the hiring documents to the job applicant’s designated address via registered mail. Please be informed that the job applicant is required to pay the postage on the registered mail.   4. In preparation for a job applicant’s request for the return of hiring documents pursuant to the main sentence of paragraph 2 above, the Company shall retain the original hiring documents submitted by the job applicant for 180 days from the completion of the recruiting process. If no request is made until the end of this period, all his/her hiring documents will be destroyed immediately in accordance with the Personal Information Protection Act.   5. The above paragraphs 1 - 4 shall only apply when the labor-related laws of Korea govern the application. They are otherwise not applicable.

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 ecommerce 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 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.   Job Overview   Coupang Pay, a fintech subsidiary of Coupang Corp, provides payment gateway services for our growing and diverse business and customers. We focus on providing innovative payment and financial service solutions to all people and businesses that use Coupang’s platforms, ranging from the customers who make a purchase on coupang.com and use Coupang Eats service, the merchants who sell on Coupang’s open market platform, and the restaurants that use Coupang Eats delivery service. Coupang Pay strives to innovate all our customers’ payment-related experiences with the team members who have the most diverse fintech experiences and have a good understanding of Coupang’s business.   Why Coupang Pay?   * Shape the future of digital payments in one of the world’s fastest-growing e-commerce ecosystems. * Own mission-critical systems serving millions of customers at global scale. * Work in an inclusive, high-impact culture that values innovation, speed, and craftsmanship. * Competitive compensation, equity, benefits, and continuous learning opportunities.   Key Responsibilities   We are seeking a Sr. Staff Back-end Engineer who is both a visionary technical leader and a hands-on builder. This role combines architectural ownership, full-stack development, and distributed systems expertise to deliver payment systems with industry-leading scale, resiliency, and speed.   In this role, you will lead the technical roadmap and define FinTech Lending products from the ground up. Your system will directly power the financial health of millions of consumers and small business sellers across multiple Asian markets.   Hands-on Architecture & Development * Architect, design, and implement complex, distributed, cloud-native systems spanning frontend, backend, APIs, data pipelines, and infrastructure. * Write and review production-grade code; optimize critical paths for performance, reliability, and correctness. * Lead by example in code quality, observability, CI/CD, and security. Operate at Scale & Speed * Deliver mission-critical features to millions of users with rapid iteration while maintaining high availability and data integrity. * Optimize systems for concurrency, throughput, and cost efficiency under heavy global loads. * Participate in on-call rotation and drive continuous improvements in reliability and incident prevention. Full-Stack & Distributed Systems Leadership * Own large-scale payment microservices, event-driven pipelines, caching systems, and real-time APIs. * Guide teams across web/mobile frontends, middleware, and backend services to ensure cohesive and performant experiences. * Spearhead adoption of best practices in distributed computing, fault tolerance, and multi-region scaling. Innovation & Emerging Technology * Drive adoption of AI/ML technologies—build or integrate AI agents and intelligent automations into payment workflows. * Stay ahead of fintech innovation, evaluating and deploying new technologies to improve customer experience and system resilience. Leadership & Mentorship * Mentor senior engineers and Sr.Staff-level peers, fostering a culture of innovation, technical rigor, and rapid delivery. * Collaborate cross-functionally with product, design, and infrastructure leaders to shape both technical vision and product strategy.   Basic Qualifications * Bachelor’s degree in Computer Science, Software Engineering, or related field. * 15+ years of software engineering experience, with proven success in large-scale distributed systems * Deep expertise in full-stack development (Java, Go, Python, JavaScript/TypeScript, or equivalent) and core payment systems. * Hands-on architecture and design experience with microservices, event-driven systems, APIs, and real-time data processing. * Strong fundamentals in algorithms, data structures, concurrency, and system design. * Proven ability to deliver rapidly and reliably in fast-paced, high-growth environments   Preferred Qualifications * Master’s or PhD in Computer Science or related technical discipline. * Payment systems experience at top global fintech companies. * Experience in high-scale ledgering and transaction engines. * Experience in credit risk and real-time decisioning system. * Experience in core lending platform lifecycle. * Experience in cloud infrastructure and resiliency (99.999% availability). * Experience in financial security, compliance and API openness. * Deep knowledge of distributed microservices, cloud-native architectures (Kubernetes, containerization, serverless), and multi-region scaling. * Experience in dealing with and resolving the issues that occur when an organization grows and the systems get complicated * Publications, patents, or open-source contributions in distributed systems, payments, or AI applications. * Fluent English (Korean a plus); strong communication skills with global stakeholders.   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.  * Job titles and responsibilities may be subject to change depending on the candidate’s overall experience, etc. This will be communicated to the candidate at the appropriate time before the offer.   Privacy Notice   * Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below.  * https://www.coupang.jobs/en/privacy-policy/   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.  However, this will not apply where the hiring documents were submitted via the website of the Company or e-mail, or where the job applicant submitted those documents voluntarily without a request from the Company.  In addition, if the hiring documents were destroyed due to a natural disaster or any other reasons not attributable to the Company, such documents will be deemed to have been returned to the job applicant.  * A job applicant who wishes to request the return of his/her hiring documents pursuant to the main sentence of paragraph 2 above should fill out a “Request for Return of Hiring Documents” [Annex Form No. 3 in the Enforcement Rule of the Fair Hiring Procedure Act] and submit the request to the Company (Coupang Recruiting Team, Tower 730, 570 Songpa-daero, Songpa-gu, Seoul). In such case, within fourteen (14) days from the date of identifying the receipt of the request, the Company will send the hiring documents to the job applicant’s designated address via registered mail.  Please be informed that the job applicant is required to pay the postage on the registered mail.   * In preparation for a job applicant’s request for the return of hiring documents pursuant to the main sentence of paragraph 2 above, the Company shall retain the original hiring documents submitted by the job applicant for 180 days from the completion of the recruiting process.  If no request is made until the end of this period, all of his/her hiring documents will be destroyed immediately in accordance with the Personal Information Protection Act.