Description

Payment systems using credit cards, e-money, the Web, and apps are no longer inseparable from our lives. Rakuten Card has been the industry's top class with more than 25 million members, No.1 credit card handling volume in Japan (based on its own issuance) for four consecutive years, and No.1 customers satisfaction rate for 13 consecutive years.

We continue to grow with a high goal achieving triple digits: 30 million credit card issuance, 30 trillion yen in shopping handling volume, and a 30% share of the credit card industry.

Department Overview

Our system department handles all systems that support the expanding service lineup, such as rapidly growing membership and transaction value, and upgrade Rakuten e-NAVI and Rakuten Card application services.

The scope of responsibility is wide-ranging, including card payment systems, credit management systems, Rakuten e-NAVI, Rakuten Card application, call center systems, and other systems.

Position Details

• Contribute to specifications, designs, and detailed implementation decisions.
• Take an active part in verification of new data models.
• Coordinate and collaborate with other teams across time zones and locations to share database management practices within the company.
• Decide on the platforms and coding standards to be used in project development for database access layer.
• Presentation of technical concepts, prototypes, and specific solutions to internal and external audiences of varying technical capabilities in a clear, concise, and easily understood manner.
• Operational enhancement based on best practices.
• Introduce new tools for more efficient management of our databases.

Work Environment

• Mid-Career: 60%
• New Graduate: 40%
• Alumni SLER and Web System Development companies
• OS: Linux, RHEL, Ubuntu

Mandatory Qualifications

• Business-level communication skills in Japanese or English
• Information engineering or related knowledge
• Understanding of basic statistics
• Ability to work alone and collaborate with international colleagues
• Software development experience. Especially Python, Java
• Experience implementing using machine learning frameworks such as TensorFlow, scikit-learn, PyTorch, Keras, etc.
• Basic knowledge and operational ability of Linux
• Knowledge of SQL / relational database

Desired Qualifications

• Knowledge of data science methods such as SQL, regression, trees, and clustering
• Knowledge of relational databases
• Experience in natural language processing using neural networks
• Experience in managing and operating big data using Spark, Parquet, Hive, Impala, Kafka, etc.
• Experience in designing, developing, and operating AI infrastructure using cloud and Kubernetes
• Experience in data analysis using a data warehouse / BI system
• Practical experience related to the development and operation of business systems including large-scale data and large-scale transactions

Location

Fukuoka Office or Tokyo Office

Secondment

Employed by Rakuten Group, Inc. and transferred to Rakuten Card Co., Ltd.