Site Reliability Engineer : Service Operation Department, System Operations Division, Rakuten Card Co., Ltd.

Rakuten Group, Inc.

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Tokyo, Japan Until 8/22/2026 H-1B sponsor history First posted April 20, 2026 Last posted April 20, 2026
Job description

Job Description:

Business Overview
Payment systems, including credit cards, electronic money, and web/app-based payment systems, have become an integral part of our daily lives. Rakuten Card has become Japan's leading credit card company and continues to grow as a leading company in the industry.

Department Overview
The Service Operation Department supports the growth of Rakuten Card by maintaining the IT platform, which is the backbone of our rapidly evolving services. In addition to infrastructure construction and operations, the department drives system evolution through innovative operational improvement activities, such as the application of cutting-edge technologies.
To further expand our business, we are looking for team members who can grow with us as we expand our operations base in Tokyo. This position offers the opportunity to not only manage large-scale IT platforms but also contribute to the evolution of our systems.

Why We Hire
Maintaining an IT platform that can keep up with the constantly evolving service requirements requires advanced skills and experience. This position is designed to solve daily challenges with high productivity.
We aim to build a "Site Reliability Engineering (SRE) team" that pursues the reliability and productivity of the system platform supporting Rakuten Card's business. This role offers opportunities to work in various areas, including servers, networks, security, and databases.

Position Details
As a member of the unit, you will be assigned several areas of responsibility based on your experience and interests, including:

- Promoting infrastructure automation and infrastructure construction/operations

- Driving infrastructure-related projects (in collaboration with other departments, external vendors, and partners)

- Building and supporting system platforms using container technologies (Docker/Kubernetes)
- CI/CD platform build, operations, maintenance, and enhancement

- Operating and maintaining relational databases

- Managing production services to improve service reliability

Work Environment

Mid-career hires: 60%

New graduates: 40%

Backgrounds: IT Vendor companies, web-based system development companies, etc.

Tech Stack
GCP (Google Cloud Platform)

Kubernetes、VMware

Linux

Oracle DB

Apache Cassandra

Mandatory Qualifications

- 3+ years of experience in infrastructure design, construction, and operations

- Basic understanding of key protocols (TCP/IP, HTTP) at a level sufficient to discuss their meaning

- Communication skills sufficient to negotiate with internal teams and user departments

Desired Qualifications
We are actively considering candidates with any of the following experience or skills:

- Experience operating PCI DSS-compliant systems

- Experience implementing and operating public cloud platforms such as AWS, Google Cloud, or Azure

- Team leadership experience managing 5-10 members

- Management experience, such as serving as a team leader

Additional Information About the Location

Tokyo (Rakuten Crimson House Aoyama), Fukuoka

Additional information on Secondment
You will be employed by Rakuten Group, Inc. and seconded to Rakuten Card Co., Ltd.

※For more information, please refer to the links below: 

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▼About Company  

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▼ Conditions of Employment 

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Languages:

English (Overall - 1 - Beginner), Japanese (Overall - 4 - Fluent)
About this role

Summary

Maintain and improve IT platform, automate infrastructure, support large-scale systems

Job title

Site Reliability Engineer

Experience level

3+ years

Industry

fintech

Location requirements

Tokyo, Japan; onsite work with some remote possibilities

Salary

Not specified

Visa sponsorship

H-1B sponsor history

Management role

No

Skills & keywords

Required skills

infrastructure designTCP/IPHTTPcommunication

Preferred skills

PCI DSScloud platformsteam leadershipmanagement

Specializations

infrastructurecloudkubernetesdevopsdatabases
Locations

Structured locations inferred from the posting.

Tokyo, Japan

On-site City