Senior Staff Back-end Engineer (Rocket Pay)
Core
Define technical direction for core payment domains and design/evolve highly reliable fintech systems handling large-scale traffic for Coupang's platform.
Role type
Senior Staff IC backend engineer (payment/fintech)
Builds
Core payment services (Coupay), payment back-office systems, settlement and reconciliation platforms
Domain
Fintech / Payments / E-commerce
Deliverable
production ML models | product features
Required skills
Java, Kotlin, Spring Framework, distributed systems architecture, system design, performance optimization, security, data consistency, technical ownership, problem structuring
Preferred skills
JPA, microservices architecture (MSA), payment/fintech domain expertise, incident response, high-traffic monitoring, SLA improvement, large-scale data processing, technical leadership
Technologies
Java, Kotlin, Spring Framework, JPA, MSA
Responsibilities
Define technical direction for core payment domains; design and evolve reliable fintech systems for large-scale traffic; own stability/scalability/security of core payment services; lead architecture of back-office and settlement systems; elevate team technical bar via code/design reviews
Seniority
Senior Staff, hands-on IC with strategic influence
