DevOps Engineer (Fukuoka Office)- Service Operation Department, Product Development Division, Rakuten Payment, Inc.

Job Description:

Business Overview Rakuten Group's basic management philosophy is to "empower people and society through innovation”. We provide more than 70 diverse services, including EC services such as shopping malls and travel booking sites, financial services such as Rakuten Pay, Rakuten Point Card, Rakuten Edy, Rakuten Check, and media services and professional sports, to more than 100 million customers in Japan alone (more than 1 billion globally), covering a wide range of people's life scenes. At the same time, we are building a strong business model based on the "Rakuten Ecosystem" that organically links customers and various services.

As a member of the Rakuten Group's FinTech Group Company, we at Rakuten Payment, Inc. are developing businesses centered on settlement services such as Rakuten Pay, Rakuten Edy, and Point Partner Business, as well as marketing solutions. With the power of technology, we aim to create a world where anyone can enjoy the same value no matter where they are. As the digital sphere of society rapidly expands, we want to connect the Internet and the real world more seamlessly, so that everyone can use technology to lead a safe, secure, and more comfortable daily life. In order to achieve such a society, we would like to face the various problems that people are facing and move forward together to the next stage. 　 Department Overview With the strength of the Rakuten Point market, which has surpassed 4 trillion yen in total issuance, we are building the "Rakuten Economic Circle" through service collaboration with Rakuten Group companies and the introduction of cashless settlement services in real stores, which are growing at an accelerated pace. Our settlement services can be used at approximately 5 million online and offline locations, including supermarkets, convenience stores, and shopping malls nationwide, as well as at approximately 1 million locations where traffic-related e-money can be used, and the number of locations where this service can be used is continuing to expand. This Product Development Division handles everything from system service planning related to payment services, planning and implementation related to UI/UX, basic and detailed system design, coding, testing, and operation. As the service expands, you will be able to experience the planning, development, and operation of a very large-scale system.

Team Culture We are a full-stack operations team where development, infrastructure, SRE, and service operations work closely together.

Why Join Us Beyond Incident Management: You will not only be responsible for incident response but also play a proactive role in improving the system as a whole. This environment allows you to acquire broad, hands-on expertise across cloud infrastructure, databases, and applications. Mission-Critical Impact: You will play a vital role in ensuring business continuity by delivering a stable and reliable service to our users.

Key Highlights Lead and drive initiatives to improve maintenance and operations, including planning and executing projects to enhance system performance and reliability.

Position: Why We Hire

The transaction volume and number of partner stores for our loyalty card service continue to grow, and as a result, the demands on the reliability and scalability of our system infrastructure are increasing.

To balance the need for faster development with the need to ensure system stability, our current team is pursuing several strategic initiatives, including enhancing CI/CD, establishing an observability infrastructure, and optimizing cloud costs. To accelerate these initiatives, we are seeking to expand our team of DevOps engineers at our Fukuoka office.

Position Details

Depending on your start date and the status of the project, you will be assigned one of the following tasks.

Maintenance and Development Support

• Minor development tasks such as adding features and fixing bugs
• Researching end-of-life (EOL) status for middleware, libraries, and operating systems, and handling planned version upgrades
• Adaptive maintenance to accommodate changes in the external environment (e.g., changes to cloud service specifications, API deprecation, etc.)
• Preventive maintenance aimed at preventing outages and resolving technical debt (refactoring, strengthening redundancy, reviewing configurations, etc.)

Operational Improvement and Project Promotion

• Identifying operational challenges and planning, coordinating, and driving improvement initiatives as projects
• Planning and executing operational optimization plans (automation, process standardization, cost reduction, etc.)

AI Utilization and AI-nization Promotion

• Streamlining development and operations processes using AI tools (code generation, document automation, etc.)
• Disseminating AI utilization knowledge within the team and establishing best practices

CI/CD and Observability

• Designing, improving, and promoting the automation of CI/CD pipelines
• Building and improving monitoring infrastructure using Grafana
• Designing SLIs/SLOs, managing error budgets, and leading incident response and post-mortems

Work Environment

The group has 7 members (as of January 2026). Proportion of Employee and Partner Staff is 2:5 English is used in global team collaboration. This position is a senior role responsible for mentoring Goal Managers and driving organization-wide improvement. 　 Mandatory Qualifications:

• Basic knowledge of Linux/Unix systems and at least 2 years of practical experience
• Experience in building and operating cloud services
• Experience with version control and team development using Git
• Experience in server-side development using Java
• Basic knowledge of RDBMS and practical experience writing SQL
• Experience reading, modifying, and debugging existing codebases (language not specified)
• Experience creating unit tests and integration tests
• Experience operating container environments using Docker/Kubernetes
• Experience designing, building, and improving CI/CD pipelines
• Experience in reading, modifying, and debugging existing codebases (language agnostic)
• Experience in creating unit and integration tests
• Experience operating container environments using Docker and Kubernetes
• Experience designing, building, and improving CI/CD pipelines

Desired Qualifications:

• Experience in designing and operating microservice architecture
• SRE mindset and practical experience in designing SLIs/SLOs
• Proven track record in cloud cost optimization
• Experience in incident response and participating in on-call rotations 　 Other Information: Additional information on Location T-Building HAKATA EAST 　 Additional information on Secondment You will be transferred from Rakuten Group, Inc. to Rakuten Payment, Inc.

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Languages:English (Overall - 2 - Intermediate), Japanese (Overall - 4 - Fluent)