Senior Systems Engineer (MVNE Service) - Enterprise DX Product Management Section, BSS Development Department (BSDD)

Job Description: Business Overview The Technology Platforms Division (TPD) is responsible for building and operating the infrastructure and ecosystem platforms which power the Rakuten Group, Inc. Our mission is to provide our Rakuten Cloud and Ecosystem Platforms which will deliver Core Value to accelerate the growth of Rakuten Group, Inc. services. Department Overview Our department, BSS Development Department (BSDD) , develops and maintains the BSS platform for MNO, VOICE, and ISP services, and is in charge of development and maintenance of IT infra (on-premise and cloud environment) for BSS platform. Position: Why We Hire The Enterprise DX Product Management Section smoothly and reliably provides low-price, high-quality services to many customers through the development and operation of information systems (BSS: Business Support System), the provision of enterprise MVNE services, and voice services. We are continuing to build and develop systems for delivery and use, and as a start-up established 3 years ago, we are looking for more team members to help our business expand further. It is expected that this Systems Engineer will develop their career to lead a team of Business Analysts in the future. Position Details As a Systems Engineer for MVNE services, your responsibilities will be as follows: Manage BSS releases - Discuss and gather business requirements and transform them into BSS component/system requirements, to create a Change Request (CR). - Create process/sequence diagram to explain requirements. Analyze the impact of business requirements along with BSS Engineering (design/dev/QA) team. - Review design documents and give sign-off for further development and testing. - Ensure business requirements are delivered as per the actual ask, meet. Telecom Industry BSS standards, and own the CR end-to-end. Prepare and coordinate the next MVNO onboarding for BSS - Discuss comprehensively with all parties, planning and clarifying onboarding requirements. - Participate in planning with external/internal stakeholders (scope, design, timelines, deliverables, risks/mitigations, etc., but not budget planning). Support existing customer maintenance and system failures for closure - BSS release test support and release support. - Support Ops and QA from a technical perspective. - Review SIT, UAT, production sanity test cases for every release. - Support security testing process. - Support product quality process. Mandatory Qualifications: - 7+ years of experience as a System Engineer or Technical Lead in the design, development, and integration of enterprise systems, with demonstrated leadership or mentorship responsibilities. - Proven ability to lead technical discussions, guide development teams, and provide technical oversight for the implementation of complex solutions. - Strong background in telecommunications BSS environments, including understanding of key modules (e.g., CRM, Billing, Provisioning). - Excellent communication and interpersonal skills to effectively collaborate with cross-functional teams and stakeholders. Desired Qualifications: - Demonstrable experience with API-first design principles and practical application of REST/SOAP for system integration. - Advanced SQL skills and hands-on experience with Oracle Database for performance tuning, schema design, and complex data retrieval. Other Information: Additional information on Location Tokyo Office Additional information on Language Business-level fluency in Japanese & English #engineer #applicationsengineer #technologyplatformdiv #RakutenMobile Languages: English (Overall - 3 - Advanced), Japanese (Overall - 4 - Fluent) In Japanese, Rakuten stands for ‘optimism.’ It means we believe in the future. It’s an understanding that, with the right mind-set, we can make the future better by what we do today. So we challenge ourselves to evolve, innovate and experiment, to create a better, brighter future for everyone. Today, our 70+ businesses span e-commerce, digital content, communications and fintech, bringing the joy of discovery to almost 1.3 billion members across the world. If you have any trouble logging in, please contact us here Rakuten Group, Inc.: rakuten-recruiting-info@mail.rakuten.com Please read the Application Requirements(EN) / 募集要項(JP) before applying. Our Diversity & Inclusion Policy and Application Documents Rakuten’s corporate mission is to “contribute to society by creating value through innovation and entrepreneurship.” We foster a culture that provides equal opportunities to those who share this founding philosophy and take on the challenge to transform society, regardless of age, gender, nationality, or any other status. Diversity is one of Rakuten's core strategies and a driving force for innovation. Because of this, you are not required to submit any of the following information in order to apply for our job positions. - Gender - Age - Photo - Nationality - Information not related to business, such as ideological beliefs, family structure, etc. * For legal compliance, we may ask you about your work eligibility. See the details