CareerPlan

Lead Software Engineer, Rakuten Ichiba - EC Marketplace Development Department (ECMPD)

Osaka, JapanFull-time2026-07-16 → 2026-11-13

Core

Design, develop, and manage high-availability backend and frontend services for Rakuten Ichiba's 'Reserve' and 'Repeat Purchase' systems.

Role type

Lead Software Engineer (Backend/Frontend)

Builds

Scalable features for mission-critical e-commerce systems serving millions of customers

Domain

E-commerce, High-availability systems

Required skills

Java/Java EE, JVM internals, RESTful APIs, Microservices, Docker, Kubernetes, CI/CD, Linux troubleshooting, SDLC best practices

Preferred skills

Spring Framework, React, RDBMS/NoSQL, GraphQL/gRPC, CDN/Caching, AI tools, Financial systems knowledge

Technologies

Java, JVM, Docker, Kubernetes, Jenkins, React, Spring, GraphQL, gRPC, Apache, Nginx, Tomcat, Git, Maven, Gradle

Responsibilities

Design and develop backend/frontend services, manage full-service lifecycle from architecture to operations, troubleshoot 24/7 systems, drive system modernization and performance tuning

Seniority

Senior, hands-on IC with leadership potential