[Coupang Pay] Senior Back-end Engineer (Coupang Pay Core)

Seoul💼 Full-time🗓 2026-07-24 → 2026-09-26

Core

Building and stabilizing Coupang Pay's one-touch payment system and fintech backend services for Coupang.com and Coupang Eats customers and sellers.

Role type

Senior Back-end Engineer (Fintech/Payment)

Builds

Coupang Pay core payment infrastructure, BaaS liquidity options, and fintech back-office systems

Domain

Fintech, Payment Systems, Large-scale Distributed Systems

Deliverable

production ML models | product features

Required skills

Java, large-scale distributed system design, algorithmic problem solving, system design, trade-off analysis, ownership, proactive execution, rapid learning

Preferred skills

JPA, Microservices Architecture (MSA), payment domain experience, incident management and monitoring, large-scale data batch processing, Agile methodologies

Technologies

Java, JPA, Microservices

Responsibilities

Develop and enhance the one-touch payment system 'Coupay', collaborate with accounting and capital teams to build fintech back-office, conduct code reviews to ensure high-quality code, solve problems to serve 10 million+ customers

Seniority

Senior, hands-on IC

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About Coupang

Coupang is at the forefront of the AI and high-performance computing (HPC) revolution. We are building a next-generation cloud platform designed to provide developers, researchers, and enterprises with seamless, scalable, and powerful access to accelerated computing. As the demand for AI, machine learning, and data-intensive workloads skyrockets, we are looking for a visionary product leader to define the future of our core compute offerings.