Tokyo, Japan · On-site
Job Description: About Organization The Architecture Review Board (ARB) acts as the final technical gatekeeper for every High-Level Design (HLD) within the Rakuten Mobile network. Our mission transcends basic technical f…
Skills: Artificial Intelligence, Machine Learning, LLM Fine-tuning, RAG Pipelines, Python
Tokyo, Japan · On-site
Job Description: About Organization Cloud Platform Department provides end-to-end services for Rakuten Mobile’s virtualized infrastructure, from build to operations. Our Data Center E&O Team manages the full lifecycle of…
Skills: Data Center Operations, Infrastructure Management, Service Monitoring, Incident Management, Change Management
Okayama, Japan · On-site
Job Description: 組織説明 クラウドプラットフォーム部は、楽天モバイルの仮想基盤を提供します。 クラウドインフラストラクチャー部は、その中でも楽天モバイルの仮想ネットワークを稼働しているDCでの環境構築、運用・保守、およびハードウェア基盤の設計、開発をベンダとともに進めています。 大規模商用ネットワークとして世界初となるモバイルネットワークアーキテクチャで使用するデータセンターの運用・管理をしながら、クラウドに関する一連…
Skills: Server maintenance, Network equipment maintenance, Data center operations, Hardware installation, Cabling
Tokyo, Japan · On-site
Job Description: About Organization Cloud Platform Department provides Rakuten Mobile's virtual infrastructure. Within this department, the Cloud Technology Department is specifically responsible for the design, build, a…
Skills: Linux, Kubernetes, Docker, Containerd, Go
Tokyo, Japan · On-site
Job Description: Department Overview Our mission is to empower people and society by engaging in corporate services and the construction of Rakuten Mobile Network equipment, thereby contributing to the innovation of phys…
Skills: NTT dark fiber, Construction management, Base station configuration, Optical fiber, SFP
Tokyo, Japan · On-site
Job Description: About Organization Rakuten Mobile, Inc. is an entity established for the launch of its mobile carrier business as an MNO (Mobile Network Operator). We aim to provide the most competitive and convenient s…
Skills: Cyber Threat Hunting, Incident Response, Forensics, MITRE ATT&CK, Network Security
Tokyo, Japan · On-site
Job Description: About Organization Core Network Operations Department is responsible for the operation of Rakuten Mobile’s fully virtualized network. We manage critical infrastructure components for the Rakuten Core net…
Skills: 5G Core, Network Operations, Troubleshooting, Kubernetes, Cloud Architecture
Tokyo, Japan · On-site
Job Description: About Organization Core Network Operations Department is responsible for the operation of Rakuten Mobile’s fully virtualized network. We manage critical infrastructure, including IMS (IP Multimedia Subsy…
Skills: 5G Core, Cloud Infrastructure, Kubernetes, Packet Core, Network Operations
Tokyo, Japan · On-site
Job Description: 組織説明 法人向けサービスや、NW装置の構築に携わることで、物理NWの構成や通信インフラのイノベーションを通じ人々と社会をエンパワーメントをミッションとしています。 NW装置の物理設計から工事完了、安全品質管理までを担当しています。 施工会社や、通信キャリア、機器ベンダーなどのバックグラウンドがある知識豊富な社員が多いです。業務拡大のため、基地局構成に詳しい方やNTT局舎内装置構成に詳しい方を募集します…
Skills: Network Engineering, NTT Dark Fiber, NTT GC Construction, Optical Fiber, SFP
Tokyo, Japan · Hybrid
$300k/mo
Job Description: About Organization Our mission is to execute R&D projects funded by governments around the world and support the realization of innovation at Rakuten Mobile. We work closely with internal and external st…
Skills: Public Fund Accounting, Corporate Accounting, Bookkeeping, Budget Management, Audit Response
Tokyo, Japan · Hybrid
$300k/mo
Job Description: About Organization Our mission is to execute R&D projects funded by governments around the world and support the realization of innovation at Rakuten Mobile. We work closely with internal and external st…
Skills: Public Fund Accounting, Bookkeeping, Budget Management, Audit Response, Stakeholder Coordination
Tokyo, Japan · Hybrid
$300k/mo
Job Description: About Organization Rakuten's fully virtualized mobile network technology, the world's first to be commercially deployed, has garnered significant global attention, winning numerous global awards. Our mis…
Skills: Government Relations, Project Planning, Negotiation, Proposal Writing, Project Management
Tokyo, Japan · Hybrid
$300k/mo
Job Description: About Organization Our mission is to execute R&D projects funded by governments around the world and support the realization of innovation at Rakuten Mobile. We work closely with internal and external st…
Skills: Government Grant Management, Public Finance, Project Management, Budget Management, Risk Management
Tokyo, Japan · Hybrid
$300k/mo
Job Description: 組織説明 当統括部は、楽天モバイルの革新的なネットワーク全体の技術開発、運用支援、および中長期戦略の立案を行っております。 統括部配下にはRAN、コアネットワーク、クラウドプラットフォーム、移動体端末等のネットワークに関わる開発機能、ならびに通信品質やユーザ体験分析を専門に行う組織を抱えており幅広い分野で専門性が求められます 業務内容 最新技術動向に基づき楽天モバイルネットワークに関する中長期戦略立案を…
Skills: Network Strategy, Infrastructure Development, Mobile Network Planning, Technical Negotiation, English Communication
Tokyo, Japan · Hybrid
$300k/mo
Job Description: 組織説明 楽天が世界で初めて商用化した完全仮想化モバイルネットワークの技術は、多数の国際的な賞を受賞するなど、世界的に大きく注目されています。 私たちのミッションは、各国政府から助成を受けた研究開発プロジェクトを遂行し、楽天モバイルのイノベーションの実現を支援することです。社内外、国内外のステークホルダーと密に連携し、6G含む最先端の研究開発を技術面・マネジメント面・オペレーション面など様々な方向から支…
Skills: Project Management, Network Engineering, 6G Technology, Technical Negotiation, Technical Proposal Writing
Tokyo, Japan · Hybrid
$300k/mo
Job Description: About Organization Rakuten Mobile, a part of Rakuten Group, is a leading global mobile network operator that is revolutionizing the telecommunications industry. As a trailblazer in innovative technologie…
Skills: RF Planning, RF Optimization, 5G Network Design, LTE, AI/ML in Telecom
Tokyo, Japan • On-site
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The AI Solution Architect will lead the development of the proprietary Tech SLM platform using advanced LLM and RAG pipelines to automate design reviews. They will also serve on the AI Council to establish architectural guardrails, validate use cases, and optimize AI/ML infrastructure for network performance.
Candidates must have at least 7 years of industry experience, including 3+ years in AI/ML software architecture and Generative AI implementation. A bachelor's degree in a technical field is required, along with strong expertise in LLMs, fine-tuning, and scalable cloud-based AI deployment.
The Architecture Review Board (ARB) acts as the final technical gatekeeper for every High-Level Design (HLD) within the Rakuten Mobile network. Our mission transcends basic technical feasibility; we analyze solutions through a multi-angle lens, including strategic necessity, security, infrastructure optimization, and competitive benchmarking.
We are currently spearheading two major initiatives:
Why Join Us
Rakuten Mobile is a Rakuten Group company responsible for mobile communications, centered on its mobile network operator (MNO) business. Through continuous innovation and the deployment of advanced technology, Rakuten Mobile aims to redefine expectations in the mobile communications industry in order to provide appealing and convenient services for diverse customer needs.
Offices: 1-14-1 Tamagawa, Rakuten Crimson House, Setagaya-ku, Tokyo 158-0094, JP
Rakuten Mobile is a Rakuten Group company responsible for mobile communications, centered on its mobile network operator (MNO) business. Through continuous innovation and the deployment of advanced technology, Rakuten Mobile aims to redefine expectations in the mobile communications industry in order to provide appealing and convenient services for diverse customer needs.
Offices: 1-14-1 Tamagawa, Rakuten Crimson House, Setagaya-ku, Tokyo 158-0094, JP
