Application Engineer, System Development Group -Corporate Business Operation 2 Section, Corporate Business Operation Department (Group Sales Div)

Tokyo, Japan March 18, 2026 Full Time Workday

Job Description:

About Organization:

Department Overview

This organization will be responsible for providing mobile services to corporate customers, and will be the only technical department within that department. With an understanding of corporate business, you will be responsible for planning, developing, maintaining, and managing vendors for both internal and external systems.

To become the No. 1 carrier, you will participate in the business as a core member in further expanding our business.

The System Development Group carries out a wide range of tasks, including system development and maintenance, to support Rakuten Mobile's corporate business.
This is a rewarding job, as you plan and develop systems that comply with laws, regulations, and rules and ensure business operations are carried out efficiently, and then implement them on-site.

Why We Hire

As Rakuten Mobile's mobile lines increase, the role of acquiring contracts for corporate mobile lines and solutions, which are the core of Rakuten Mobile, is becoming increasingly important. We are looking for an application engineer to develop and maintain systems for operations that support our corporate business.

Position Details

The Corporate Operations Section 2 primarily handles the following tasks. Within these, you will be responsible for promoting various projects and developing and maintaining currently operating systems.


1. Development and maintenance of external systems: SIM management systems for MVNEs/MVNOs
2. Development and maintenance of billing systems: Billing and billing systems for MVNEs/MVNOs
3. Administrative tasks: Outsourced management of system development, maintenance, and operation, including registering and updating customer information in the system, billing, and collections.
4. Other: In-house system development and maintenance.

Most of the time, you will be working in the office, communicating face-to-face. You can also work from home up to once a week. Flexible working hours are also available, allowing you to work in a way that suits your lifestyle.
Work will primarily be conducted in Japanese, with the exception of some internal meetings and communication with the tech team.

Work Environment

Our group is made up of members in their 30s to 50s. Each member utilizes their expertise and knowledge to make it easy to communicate with others.

Furthermore, many of the project members who work together are in their 20s.

All members of the Corporate Operations Section 2 were hired mid-career. More than 80% of them are from industries other than the telecommunications industry, so they come from a variety of backgrounds.

The tools and languages ​​used are as follows:
KINTONE, Seikyu-Kannri-Robo, Google Cloud, etc.


The main development environment is as follows:
OS - Linux, Languages ​​- PHP/Python/JavaScript, Database - mySQL.

Mandatory Qualifications:

- Experience:

・3+ years of web application development and maintenance.

・Experience building cloud servers and networks.

・3+ years of work experience at a Japanese company.

- Communication Skills:

・Ability to communicate smoothly, including collaborating with stakeholders and reporting and proposing to management and executives.
・Japanese Language Proficiency: Native (N1 or higher for non-Japanese candidates).
・Attitude: A challenging spirit, the ability to respond positively even in difficult situations, and unafraid of change

Desired Qualifications:

- Qualifications: Information Technology Engineer Examination
- English proficiency: Business level
- Experience: Knowledge of MVNO/MVNE business

Others:

Additional information on Location

FutakoTamagawa Rise Office, Tokyo

Additional information on Secondment

Non

Additional information on Transfer

There is a possibility of domestic and overseas business travel and relocation.

Apply on company site

How to Get Hired at Rakuten Group, Inc.

  • Rakuten uses Workday as its ATS platform. Apply through rakuten.wd1.myworkdayjobs.com/RakutenInc for global positions. Use clean, single-column resume formatting with standard section headers to ensure accurate parsing. Verify your parsed profile data after submission.
  • English proficiency is non-negotiable for most roles. Rakuten adopted English as its official corporate language in 2012 under the Englishnization initiative. Regardless of office location, business is conducted in English. Highlight your language skills prominently on your resume.
How to apply to Rakuten Group, Inc.

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