Senior Staff Back-end Engineer (New Fintech Product)
Core
Designing and operating stable, scalable fintech payment systems for millions of users, defining technical direction for core payment domains.
Role type
Senior Staff Back-end Engineer (Fintech)
Builds
Core payment services (e.g., 'Coupay'), payment back-office, and settlement systems for Coupang's platform.
Domain
Fintech / Payments
Deliverable
production ML models | product features | infrastructure
Required skills
Distributed system design, performance optimization, data consistency, security, complex domain ownership, technical leadership
Preferred skills
JPA, microservices architecture, payment domain expertise, high-traffic incident response, large-scale data processing
Technologies
Java, Kotlin, Spring Framework, JPA, Microservices
Responsibilities
Define technical direction for core payment domains, design and operate scalable payment systems, collaborate with finance and fintech teams on architecture, mentor engineers through code and design reviews
Seniority
Senior Staff, hands-on IC with strategic influence