Rakuten Group, Inc.

Backend Developer, Rakuten Ichiba - R-Backoffice Section, EC Marketplace Development Department (ECMPD)

Tokyo, Japan March 18, 2026 Full Time Workday

Job Description:

Department Overview

EC Marketplace Development Department (ECMPD) is a tech division under Rakuten Commerce & Marketing Company of Rakuten Group, Inc. We are responsible for developing and enhancing our online system to support our core business, Rakuten Ichiba.

Rakuten Ichiba is one of the largest internet shopping malls in Japan with 5.6 trillion sales in 2022 and our business is growing year on year. We aim to provide the best shopping entertainment for our shoppers and empower our partners in Rakuten Ichiba.

Position:

Why We Hire

While this service is growing steadily, we need a more robust and scalable system to drive further growth. We are also committed to providing the best user experience possible. This requires a stronger team and higher engineering skills, and we need more Backend engineers to work with us as part of our development team.

　

Position Details

- Define requirements, design, programming, testing, and deployment to deliver the system

- Collaborate with PDM, internal members, and upstream/downstream system teams

- Monitor system stability and performance, optimize performance, design and maintain system architectures, refactoring, optimization, and troubleshooting

　　

Mandatory Qualifications:

- 5 years of experience in Java/Spring Boot web application development (both Web and Batch)

- 5 years of experience in designing and developing REST APIs, with strong proficiency in JUnit testing and code reviews

- Experience in operating large-scale online systems and handling incident response

- Experience with relational databases (Oracle or MySQL)

- Hands-on experience using Tomcat or WebLogic

- Experience in Git, Linux, and Gradle

- Experience with CI/CD using Jenkins or other similar tools

- Knowledge and practical experience in container architectures such as Docker and Kubernetes, applied in system development

　

Desired Qualifications:

- English communication skills

- Experience in leading design to consider overall system scalability and maintainability, and strategically guiding the future vision of services (user base expansion, new feature integration)

- Experience in conducting Performance/Load/Stress Tests, etc.

- Experience with Redis, Kafka, Elasticsearch, Grafana, and Kibana

- 3+ years of experience in PHP Application development using any framework

- Experience in environment setup using Kubernetes

- Kubernetes certification (CKA or CKAD) obtained

　

Other Information:

Additional information on English Qualification
TOEIC Score 800 above or possess equivalent abilities

#engineer #applicationsengineer #commerce #RakutenIchiba

Languages:

English (Overall - 4 - Fluent)
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How to Get Hired at Rakuten Group, Inc.

  • Rakuten uses Workday as its ATS platform. Apply through rakuten.wd1.myworkdayjobs.com/RakutenInc for global positions. Use clean, single-column resume formatting with standard section headers to ensure accurate parsing. Verify your parsed profile data after submission.
  • English proficiency is non-negotiable for most roles. Rakuten adopted English as its official corporate language in 2012 under the Englishnization initiative. Regardless of office location, business is conducted in English. Highlight your language skills prominently on your resume.
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