Job Description
Business Overview
The Technology Platforms Division (TPD) drives the growth of Rakuten's ecosystem by delivering innovative, high-quality technology platforms characterized by integrated control and strategic partnerships.

Department Overview
By joining our TECH community, the IT powerhouse of the Rakuten Group, you will be part of a diverse global team and play a central role in our technology and innovation. Aligning with TECH's innovative nature, our Incentive Platform Department (INPD) is thinking big: building scalable platforms that powers the Rakuten Ecosystem worldwide.

And we in Point Platform Group, under Loyalty Platform Section, are responsible for developing and operating Rakuten Point Platform, the most popular loyalty program in Japan. Through Rakuten Point, millions of users are connected everyday with popular Rakuten services such as EC, Bank, Card, as well as to thousands of convenient stores all over Japan. However, our mission doesn't stop there, Rakuten point now is expanding in all over the world from Europe to the Americas to APAC region, and our ongoing mission is to connect it all under single global platform.

By the time you finish reading this, hundreds of thousands of points transactions have been processed through our platform Interested in hearing more? Come talk with us.

Position
Why We Hire
We are looking for a Senior Software Engineer to join our team and contribute to the development of faster and more resilient web services.

In this role, you will partner with Product Managers to design and build robust, globally scalable web applications. You will be responsible for delivering high-quality code and reliable services, while contributing to continuous improvement in both our systems and processes.

This position includes opportunities to mentor junior engineers and grow into technical leadership roles.

Position Details

• Design and develop large-scale backend systems as a key member of our agile development team
• Demonstrate a commitment to excellence by delivering high-quality code, robust unit tests, and thorough documentation
• Actively research and integrate modern technologies and methodologies to optimize development productivity and efficiency
• Drive continuous quality improvement through systematic refactoring, collaborative peer reviews, and dedicated mentorship of junior engineers
• Ensure the safe and reliable delivery and ongoing operation of applications throughout their lifecycle, from development to production
• Utilize artificial intelligence and machine learning advancements to significantly enhance development productivity and ensure the highest levels of application performance

Work Environment
Our teams are strategically located in two key cities: Tokyo and Dalian, China. Each location hosts a diverse group of professionals, including Product Managers, Technical Delivery Managers, Developers, Quality Assurance Engineers, and Site Reliability Engineers. The Tokyo and Dalian teams are of comparable size, each comprising approximately 30 to 50 members.

Our team is composed of individuals with a wide range of ages and experience levels, from recent graduates to seasoned senior members, with an average age of around 35. The engineering team is currently characterized by a composition of a few senior members and a significant number of junior engineers. We are therefore looking for mid-to-senior level engineers who possess the capability to lead and guide the team effectively in the field.

Tech Stack

• Programming languages: Kotlin, Java
• Platform: Google Cloud, internal private cloud
• Databases: Cassandra, TiDB, Redis, MySQL
• Application Framework: Vertx, Quarkus
• Batch and Streaming: Kafka, Spark
• Monitoring: ELK
• Others: GitHub Actions, Continuous Integrations (CI/CD), Kubernetes

Mandatory Qualifications
Education

• Bachelor's degree (BS) in Computer Science, Engineering, or a related field

Experience

• At least 7+ years of working experience in software engineering with a strong foundation in building scalable, distributed systems

Technical Skills

• Demonstrated ability to mentor junior engineers, contribute to technical decision-making, and collaborate effectively across cross-functional teams
• Strong experience in code reviews, technical documentation, and following software engineering best practices
• Strong experience with CI/CD pipelines, automated testing, and a commitment to maintaining high software quality standards
• Ability to support production systems, including incident management and root cause analysis for issue resolution

Soft Skills

• Excellent communication skills, with the ability to effectively collaborate with cross-functional teams and business stakeholders

Language Skills

• Business-level fluency in English is required

Desired Qualifications

• MS in Computer Science or a related technical discipline
• 1-2 years of informal team leadership or mentoring experience
• Experience in application deployment and operation on public cloud platforms (e.g., AWS, Azure, GCP)
• Experience working in distributed or remote engineering teams
• Hands-on experience with system architecture design for medium to large-scale applications
• Experience with load testing and troubleshooting issues related to high-volume traffic
• Practical experience with microservices architecture and distributed systems
• Experience with AI/ML projects or utilizing AI tools to improve team productivity (e.g., code completion, automated testing)
• Track record of contributing to technical decision-making in previous roles

Other Information
Additional information on Transfer
While long-term relocation to different locations is generally not expected for this role, there may be occasional business trips of 1-2 weeks to our overseas subsidiaries.

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