Web Application Engineer - EC First Party Development Department (ECFD)
Core
Lead the design, development, and technical direction of large-scale e-commerce web applications and back-end systems for Rakuten's first-party business units.
Role type
Senior IC application engineering leader (Java/Spring)
Builds
Rakuten Fashion, Rakuten 24, Rakuten Mart, Rakuten Zenkoku Super, Rakuten Bic
Domain
E-commerce, Retail
Deliverable
production ML models | product features | infrastructure
Required skills
Java (SpringBoot), Web API design, DB schema design, System architecture, Performance tuning, Code review, External system integration, Vendor management
Preferred skills
MicroService architecture, Kubernetes+Docker, Test automation, SAP or Dynamics365
Technologies
Java, SpringBoot, OracleDB, Redis, Git, Kubernetes, Docker, Jenkins, Gradle, Maven, Grafana, Prometheus, Sentry
Responsibilities
Define requirements and design applications, lead development and technical projects, monitor system stability and optimize performance, manage external vendors, refactor and troubleshoot systems.
Seniority
Senior, hands-on IC with leadership responsibilities