Senior Staff Software Engineer

We're looking for a Senior Staff Engineer to lead the technical direction of MyCoupang, Coupang's post-purchase customer experience platform. Every order tracking, delivery, return, payment, and support interaction for tens of millions of active customers across Korea and Taiwan flows through this system.
Responsibilities:
You will own the most critical technical challenges on the platform: designing multi-market abstractions that scale to new regions, driving the system toward 99.99% availability, leading disaster recovery readiness and capacity planning across the full production fleet, and defining the long-term architecture for a platform that must reliably serve billions of requests weekly while continuing to evolve.
You will directly influence customer retention and satisfaction metrics for every Coupang post-purchase interaction.
set the engineering bar for the team and shape the technical strategy for one of Coupang's most customer-facing systems.
Requirements:
Minimum 12 years of experience working on software design and development in Java.
Hands-on experience with designing, building, and deploying scalable, highly available systems.
Experience with high-throughput, low-latency systems handling millions of requests.
Experience with event-driven architectures using Kafka or similar messaging systems.
Strong problem-solving skills and ability to debug complex distributed systems.
Excellent collaboration skills to work with cross-functional teams (Product, CS, Logistics, Payment).
Preferred Qualifications:
Backend development (Java, Kotlin, or similar JVM languages preferred).
RESTful API design and implementation.
Database design and optimization (MySQL, Aurora) Message queue systems.
Kafka workflow engines (Activiti BPMN, Temporal).
Monitoring and alerting (Grafana, CloudWatch).
Version control (Git) CI/CD tools (CircleCI or similar).

Experience
13-17 yrs