Engineering Jobs in Japan

SAP FI/CO Senior Application Specialist - Corporate IT Service Department

The Technology Management Division (TMD) provides Corporate IT, and Cyber Security & Privacy Governance to Rakuten Group companies and essential business management for technology organizations, thereby enabling innovation and strengthening the technology foundation. Within TMD, the Corporate IT Supervisory Department (CITD) drives Rakuten Group’s global corporate IT services and infrastructure. Our mission is to empower Rakuten through innovative and secure IT solutions that enhance efficiency and foster productivity. The Corporate IT Infrastructure Department (CITID) provides the stable and reliable technological foundation that supports Rakuten's global business operations. We deliver simple, secure, and robust infrastructure services with operational and engineering excellence, managing core infrastructure, enterprise collaboration platforms, development support tools and project management. The SAP Senior Application Specialist plays a critical role in the design, implementation, and continuous improvement of SAP solutions across business units. This role requires deep expertise in SAP modules (e.g., S/4HANA FI/CO, AA, PS), strong business process understanding, and the ability to translate business requirements into scalable SAP solutions. The specialist will collaborate with internal stakeholders, external partners, and global teams to ensure SAP systems support strategic goals and operational efficiency. Responsibilities include leading the design, configuration, and deployment of SAP modules, particularly Materials Finance (FI/CO), Asset Accounting (AA), and Project Management (PS); acting as the subject matter expert for SAP application architecture and integration points; analyzing business requirements and translating them into functional specifications and technical solutions; driving system enhancements, upgrades, and transformation initiatives such as migration to S/4HANA; collaborating with cross-functional teams to align IT solutions and business processes; managing and resolving complex incidents, performing root cause analysis, and implementing preventive measures; supporting audit and compliance activities, including documentation and system validation; and mentoring junior SAP analysts and providing end-user training as needed.

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QA Engineer/Team Lead, B2B QA Group - BSS Product Management Department (BSPMD)

The Technology Platforms Division (TPD) drives the growth of the Rakuten Ecosystem by delivering innovative, high-quality technology platforms characterized by integrated control and strategic partnerships. Within TPD, the Telecom Business Application Supervisory Department (TBASD) develops and maintains a unified, high-quality Business Support System (BSS) for Rakuten Mobile. We deliver agile, scalable solutions across the customer lifecycle and continuously enhance system performance through close collaboration with stakeholders. The Business Support System Product Management Department (BSPMD) is responsible for providing a unified product strategy for the Business Support System (BSS) that integrates with the Rakuten ecosystem to maximize Rakuten Mobile's business potential. Our core missions are managing the product development lifecycle by focusing on project ROI, building a unified BSS platform, and enhancing our AI-driven platform capabilities. We are looking for entrepreneurial, innovative, growth-oriented, and customer-obsessed individuals to join our growing team to build the Telco of the Future. We are a truly global organization, with team members from Japan, India, North America, South America, Europe, China, Korea, Australia, Africa, and more, shifting to a fast-paced, agile way of working. As a team lead for the QA Section, your responsibilities include leading the QA team and managing BSS software development projects as a QA Engineer; identifying Kaizen (improvement) areas for the team and across other teams/functions and driving a Kaizen culture within the team; communicating with group members and other managers to share and discuss QA strategy, planning, and issues; taking responsibility for overall QA planning, project progress monitoring, task risk identification, and providing improvement suggestions; ensuring that all QA deliverables meet quality standards and criteria as defined by the QA team; ensuring that the team provides high visibility on project status, issues, and best practices; and creating metrics for analyzing overall QA projects and cost.

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Linux Server Senior Engineer - Cloud Platform Enablement Department (CPED)

The Technology Platforms Division (TPD) drives the growth of Rakuten's ecosystem by delivering innovative, high-quality technology platforms characterized by integrated control and strategic partnerships. Within TPD, the Cloud Platform Supervisory Department (CPSD) develops and manages Rakuten's state-of-the-art cloud platform, empowering global scalability and accelerating innovation across its diverse business units. The Cloud Platform Enablement Department (CPED) drives Rakuten Group's global infrastructure strategy by building and operating a robust private cloud platform and supporting public cloud environments. We empower application engineers to build reliable and scalable systems while ensuring unified support and consistent quality across all departments. We are planning to strengthen our structure and increase the number of senior engineers as leader candidates for system expansion. We are looking for colleagues to join us in building systems that are directly involved in the mobile business, which is a key focus for Rakuten. Infrastructure development, management, and operation tasks for systems used by Rakuten Mobile store staff and partner companies include continuous performance tuning and capacity planning, efficiency improvements through automation, system failure response, collaboration with stakeholders, and evaluation of new technologies and planning and execution for departmental implementation. We primarily use the on-premises internal cloud environment.

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Windows Server Senior Engineer - Cloud Platform Enablement Department (CPED)

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Network Engineer — Retail Network

The Retail Network Infrastructure team designs, builds, and operates the critical network services connecting Apple Retail stores and operations worldwide. We are seeking a highly self-driven Network Engineer to deliver secure, resilient, and scalable routing, switching, wireless, and WAN infrastructure. In this hands-on engineering role, you will take technical ownership of store connectivity, proactively solve complex operational challenges, and leverage automation and modern AI-assisted workflows to elevate network reliability across our global retail footprint. Design, deploy, monitor, and optimize retail routing, switching, wireless, WAN, and related network services. Troubleshoot complex network incidents down to root cause, implementing durable fixes and preventative safeguards against recurrence. Proactively identify capacity, reliability, lifecycle, and operational risks before they affect store operations. Build and maintain automation workflows for provisioning, testing, configuration management, and operational telemetry. Leverage modern engineering and AI-assisted tools to accelerate scripting, configuration analysis, documentation synthesis, and operational efficiency. Partner with global network teams, telecommunications carriers, hardware vendors, and cross-functional stakeholders on project delivery, technology upgrades, and critical escalations. Author, review, and execute network changes in strict accordance with change-governance, documentation, and zero-downtime availability standards. Maintain operational documentation, architecture topology diagrams, SOPs, monitoring dashboards, and engineering standards. Provide tier-3 escalation support and participate in scheduled on-call coverage during business-critical periods, ensuring swift triage and resolution of high-impact incidents.

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Assoc II Stat Programmer

The Associate Programmer is an individual contributor with basic knowledge of data structures, programming languages, and programming methods. The associate supports data analyses and reporting and trial activities within clinical or statistical programming functional areas in accordance with departmental processes and procedures. This position is a member of the programming team, capable of supporting activities of low complexity with appropriate guidance and may contribute to departmental innovation and process improvement projects. The role completes programming trial activities of low complexity and/or criticality, with high quality and timeliness of deliverables; designs and develops programs in support of clinical analysis and reporting activities; may support submission activities including creation, verification, and delivery of CDISC compliant and/or non-standard data packages; performs activities in accordance with departmental processes and procedures; performs appropriate quality control and verification in support of clinical analyses and reporting activities; reviews and provides feedback on project requirements and documentation; collaborates effectively with team and cross-functional members; ensures continued compliance with required company and departmental training, time reporting and other business/operational processes as required for the position; and may contribute to departmental innovation and process improvement projects. This role reports into a people manager position within the Delivery unit and is accountable to the Portfolio and Study Leads for assigned activities and responsibilities. Functional contacts within IDAR include leaders and leads in Data Management and Central Monitoring, Programming Leads, Clinical Data Standards, Regulatory Medical Writing Leads, and system support organizations. Functional contacts within J&J Innovative Medicine include Statistics, Clinical, Global Medical Safety, Project Management, Regulatory, Strategic Partnerships, and Human Resources. External contacts include external partners, CRO management and vendor liaisons, industry peers and working groups.

NAND CAD Design Environment Engineer

Develop internal tools and flows for various areas within the CAD design environment, including circuit design, layout design, simulation, and electrical circuit checks among others. Work jointly with the global CAD members as necessary to develop these flows which will be released to all global design and verification organizations. Support design and verification teams globally with respect to training and troubleshooting issues they face. Propose new solutions based on feedback obtained from the design and verification teams. Interact with external EDA vendors to implement their tools in our flows, to push new development, and troubleshoot issues in their tools. Use agentic AI to assist in developing these flows, and/or implement AI agents in the flows themselves. Provide technical leadership and guidance to junior engineers, fostering their professional growth and development.

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AI Creative Specialist - GenMedia, BytePlus - Japan

BytePlus is the enterprise technology arm of ByteDance, providing Generative AI, multimodal models, AI agent solutions, and cloud infrastructure capabilities to businesses worldwide. Join BytePlus as an AI Solution Architect focused on Generative AI Creative. You will help customers turn cutting-edge image, video, audio and multimodal models into scalable products, creative workflows and measurable business outcomes. This is a customer-facing role spanning pre-sales, solution architecture, prototyping and production delivery. The ideal candidate combines strong technical judgment with a practical understanding of how creative content is developed, reviewed, localized, distributed and measured in industries such as advertising, e-commerce, film, animation, media and entertainment. The core focus includes generative image, video, audio and multimodal models; AI-powered creative production workflows; customer solution design and technical pre-sales; and production architecture, optimization and delivery. Industry applications include advertising creative generation and adaptation, e-commerce product imagery and video, film, animation and pre-visualization, and media localization and content operations. Responsibilities include leading customer discovery and solution architecture by partnering with sales and customer stakeholders to identify high-value creative AI opportunities, define technical and business requirements, and design solutions that connect model capabilities with real production workflows; building compelling prototypes and proofs of value by rapidly creating customer-facing demos using image, video, audio and multimodal generation models to demonstrate creative quality, workflow efficiency or commercial impact; owning production delivery and guiding solutions from prototype to launch, including model and API integration, system architecture, media-processing pipelines, deployment, observability, evaluation, safety and operational handover; designing agentic creative workflows by building practical agent harnesses that orchestrate models, tools, state, memory, asset processing, human review and quality checks across multi-step creative production tasks; optimizing quality, performance and economics by making informed trade-offs across output quality, consistency, latency, throughput, reliability and cost, and improving prompts, model configurations, routing, caching and inference strategies based on production requirements; establishing fit-for-purpose evaluation standards for creative outputs using automated metrics, model-based evaluation, human review and business or campaign performance signals; shaping product and go-to-market direction by translating customer feedback and industry patterns into actionable input for product, research and engineering teams and developing reusable solution patterns, reference architectures and industry narratives; and driving cross-functional execution with account executives, product managers, researchers, engineers, creative stakeholders and customer teams to manage technical risks and deliver successful outcomes.

EN: Not RequiredJP: Business

R&D Scientist, Powder Foundation

You will contribute to the beauty of consumers around the world through foundation formulation development. You will be expected to pursue rigorous quality control and meticulous attention to detail while continuing to create innovative, market-leading products, including “foundation serum.” In this role, you will draw on your formulation development experience to help develop Shiseido base makeup products loved in global markets. Regardless of brand, you will primarily be responsible for formulation development across base makeup products, including powder foundations, concealers, and face powders. You will also handle patent applications and prosecution, regulatory compliance, studies for scaling up to mass production, and various fundamental research projects related to these products. Based on your experience and skills, we will consider and select the most suitable assignment, ranging from research to improve existing products to the development of new formulations. This is an environment where you can experience the satisfaction of seeing formulations you developed become products and reach stores and consumers around the world. You can pursue uncompromising product development and technical excellence in an environment with world-class technical capabilities and rigorous quality standards. Under the Group Manager, you will work alongside colleagues who enjoy experimentation and challenge one another while communicating actively. The role is primarily office-based, with a focus on laboratory work, but remote work is also available depending on the tasks, such as preparing documents or conducting patent research. Employees are required to work on-site at least three days per week, and average monthly overtime is approximately 20 hours.

Data Center Engineer

We are looking for a self-starter with strong cabling expertise who can help raise operational standards and improve how we deliver infrastructure services. The Data Center Operations group is looking for a Data Center Engineer. This is a physical, on-site position requiring hands-on work within a data center environment, including cabling, equipment racking, and hardware troubleshooting. The successful candidate will be responsible for deploying and maintaining servers, networking equipment and other devices together with installing and supporting fiber and copper infrastructure in our Data Centers located in Japan and South Korea. Responsibilities include managing cabling infrastructure and DCIM (Data Center Infrastructure Management) elements; performing hardware installations, testing, and troubleshooting using standard data center processes, including physically moving and racking servers, network switches, and storage devices; assessing and triaging incoming work requests, then planning and prioritizing service delivery across the ticket queue; executing ticket-driven tasks such as power cycles, component swaps, storage media handling and cabling requests; supporting inventory/asset management, including shipping, receiving, and maintaining accurate records in asset-tracking systems; managing third-party/remote-hands vendor work and holding them accountable to technical and quality standards; identifying issues and performing Root Cause Analysis to prevent future operational impacts, maintaining strong attention to detail and documentation throughout; and establishing and enhancing strong working relationships with internal teams and external suppliers to support a collaborative and efficient work environment.