Staff Back-end Engineer (Rocket Pay)
Core
Design, develop, and operate Coupang Pay's core payment services and platforms, including the Coupay system, to ensure scalability, stability, security, and performance in high-traffic environments.
Role type
Staff Back-end Engineer (Payment/Fintech)
Builds
Scalable, secure, and high-performance payment systems and platforms for Coupang Pay
Domain
Fintech / Payments
Deliverable
production ML models | product features
Required skills
Java, Kotlin, Spring Framework, distributed systems, system architecture, technical ownership, performance optimization, data consistency, security, business impact analysis
Preferred skills
JPA, microservices architecture, migration leadership, payment/fintech domain expertise, incident management, high-volume data processing, agile technical leadership, organizational influence
Technologies
Java, Kotlin, Spring Framework, JPA, microservices
Responsibilities
Design and operate core payment services and platforms; lead improvements in scalability, stability, security, and performance; solve technical challenges in high-traffic environments; optimize payment back-office and settlement systems; collaborate with stakeholders to implement business requirements; drive technical strategy and key decisions in the payment domain; conduct code and design reviews to establish engineering best practices; support team and organizational technical growth
Seniority
Staff, hands-on IC with strategic influence
