Job Description:

Department Overview
Rakuten Mobile launched its full-scale services in April 2020 as the fourth MNO (Mobile Network Operator) in Japan, the first to be approved in 13 years, with the goal of providing high-quality mobile communication services at fair prices. We have grown rapidly, surpassing 10 million subscriptions in December 2025. We also launched full-scale services for corporate clients in January 2023. As a core business driving the future growth of the Rakuten Group, we are making large-scale investments, which have attracted significant attention both domestically and internationally.

The Quality Management Group supports the stable operation of Rakuten Mobile's corporate service systems. In the event of system bugs, defects, or incidents, we collaborate with engineers to promote early resolution and the formulation of permanent countermeasures. We also play a role in preventing failures through system monitoring to maintain stable operations. By responding quickly to issues and investigating their root causes, we contribute to preventing recurrences and improving system quality. The appeal of this role lies in being a guardian of system quality, directly supporting the provision of highly reliable services by minimizing the impact on our customers. You will work closely with engineers from development and operations teams, playing an essential role in improving service quality and ensuring stable operations. This group is vital to the success of our corporate business, and we are dedicated to professional work every day to achieve smooth system operations and provide high-quality services.

Position:

Why We Hire
Currently, as our business expands, the services we provide are becoming more feature-rich and complex.
To continue providing stable value to our customers, strengthening our system quality management structure has become an urgent priority.
Therefore, we are planning to expand our System Quality Management Team, which is responsible for collaborating with engineering teams to promote early resolution of defects and the implementation of recurrence prevention measures.

Position Details
Position Overview
In the event of system bugs, defects, or incidents, you will collaborate with engineering teams to lead rapid problem resolution and permanent countermeasures. You will also serve as a coordinator, bridging the gap between engineering teams and the business side to realize customer needs. Furthermore, your mission is to maintain stable service operations by preventing failures through system monitoring.
Key Responsibilities

- Incident Response: Rapidly detect bugs, defects, and incidents. Lead the process from situational awareness and impact assessment to escalation to relevant departments.

- Promoting Problem Resolution: Collaborate with engineering teams to manage the end-to-end process from root cause analysis to temporary fixes and the implementation of permanent countermeasures.

- Formulating and Promoting Recurrence Prevention Measures: Work with engineering teams to develop permanent improvement plans to ensure similar issues do not recur.

- System Monitoring and Preventive Maintenance: Use monitoring tools to constantly monitor system operational status for early detection of anomalies and implementation of preventive measures.

- Addressing Business Requirements: Evaluate the feasibility of requests from sales teams and customers from a technical perspective, and collaborate with engineering teams to derive optimal solutions.

Why Join Us

- Guardian of System Quality: Protect customers from system bugs and defects, directly supporting the delivery of high-quality services.

- Sense of Achievement: Gain a strong sense of accomplishment by leading complex system issues to resolution and seeing permanent countermeasures through to completion.

- Professional Growth: Hone your expertise in broad system knowledge, incident response, and quality management skills.

- High Impact: Contribute to the stable operation of the entire corporate business system and earn customer trust.

- Diverse Experience: Gain extensive knowledge and experience through exposure to a variety of system issues.

Work Environment
The entire Section consists of approximately 65 members. Within this, the Quality Management Group is composed of 7 members, with 4 members currently operating within the System Quality Management Team. The age demographic is well-balanced, blending the energy of younger staff with the insights of experienced mid-career and veteran professionals. We leverage each other's strengths and share knowledge to improve quality daily. We have a flat culture where everyone can share their opinions regardless of seniority, making it an environment where new joiners can settle in quickly.

Mandatory Qualifications:

- Practical experience using Microsoft Office products (Word, Excel, PowerPoint)

- Professional work experience using Japanese (Native level)

- Must be a resident of Japan

- TOEIC score of 600 or higher

Desired Qualifications:

- Practical experience in system operations or quality management

- Experience involved in ensuring system stability and quality maintenance, such as performance monitoring or incident response

Other Information:
Additional information on Location

Futako Tamagawa Rise Office
Zip Code:158-0094

Location: Futako Tamagawa Rise13F, 2-21-1 Tamagawa, Setagaya-ku, Tokyo

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