Senior Staff Back-end Engineer (eCommerce Engineering)
On-siteSeoul, Seoul, South Korea
Job Summary
Define the 12–18 month platform strategy and champion RFCs to align cross-functional teams on shared objectives for the next-generation global e-commerce infrastructure. Architect privacy-compliant, multi-region systems while enforcing API governance standards and controlling access with robust monitoring and detection protocols. Oversee complex system design that ensures backward compatibility, orchestrates phased migrations, and optimizes caching strategies for data integrity. Set and uphold SLOs, lead capacity planning, and drive root-cause analysis for incident management. Perform high-impact code reviews, conduct performance optimizations, and mentor Senior and Staff engineers to elevate technical standards. Partner with product and data teams to deliver reusable components and establish organizational best practices.
Required Qualifications
- 10+ years of professional backend development experience (excluding internships)
- 7+ years of experience in Java/Kotlin/Spring-based service development
- 3+ years in architecture leadership
- Proven experience designing and operating web-scale microservices
- hands-on experience with AWS and Kubernetes
- Deep expertise in diagnosing mission-critical system failures, identifying root causes, and institutionalizing preventive measures
- Strong communication and leadership skills to align stakeholders and drive complex technical decisions across organizations
Desired Qualifications
- Proven experience designing and operating AuthN and AuthZ infrastructure and services – access control, monitoring, detection, and response
- Experience designing and operating large-scale distributed systems handling global multi-region traffic
- Hands-on experience with data pipelines and event processing using Kafka, Spark, Cassandra, and Airflow
- Proven track record in building observability frameworks with tools such as OpenTelemetry, Prometheus, and Grafana
- Expertise in JVM performance tuning, large-scale cache/storage design, API schema versioning, and testing
- Experience designing platforms, frameworks, or SDKs that are widely adopted across multiple product teams
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