Staff Engineer - Backend (Post Purchase Experience)

What You Will Do Build and maintain Tier 1 & Tier 2 services that handle 500K+ requests/day across multiple microservices Design and implement complex business workflows using Activiti BPMN and Temporal Cloud for orchestrating cancellations, returns, exchanges, and refunds Integrate with 15+ upstream and downstream systems including Order, Shipment, Payments, Transport. Implement policy-driven business logic that adapts to frequently changing cancellation, return, and refund rules Basic Qualifications 7+ years of backend software engineering experience Strong proficiency in building distributed systems and microservices architecture 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) Type of work model Hybrid / Onsite / Remote working Our Hybrid work model: Coupang hybrid work model is designed to enable a culture of collaboration that acts a catalyst to enrich the experience of employees. Employees are required to work at least 3 days in the office per week, with the flexibility to work from home 2 days a week, depending on the role requirement. Some businesses may require more time in office due to nature of work. Details to consider Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws. Privacy Notice Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. https://privacy.coupang.com/en/land/jobs/