Rakuten Mobile, Inc. Tech Stack

Cloud-native 5G mobile network operator built on open RAN architecture

Telecommunications Setagaya-ku, Tokyo 1,001–5,000 employees Founded 2019 Privately Held

Rakuten Mobile operates a greenfield 5G network built on cloud-native and open RAN principles, running on AWS, Azure, and GCP with Kubernetes orchestration across packet core functions. The engineering-heavy org (49 engineers) is actively deployed across base station construction, device technology development, and network resilience — indicating a company still in infrastructure buildout phase rather than optimization, with acute operational complexity and coverage expansion as near-term constraints.

Tech Stack 136 technologies

Core StackAWS Kubernetes Docker Java Kotlin C# Linux OpenShift Python Prometheus React Azure GCP OAuth 2.0 OpenID Connect UML Microsoft Office CUPS DNS OpenStack bash Tcl Excel Unix Shell Script 3GPP O-RAN LTE 5G Remix+104 more

What Rakuten Mobile, Inc. Is Building

◆Challenges

Ensuring grant compliance
Reducing operational complexities
Performance optimization
Maintaining communication services during disasters
Optimizing packet core network functions
Expanding critical coverage areas
Drive innovation
Inventory management for base stations
Fiber line procurement difficulties
Expanding enterprise fixed-line services

▲Active Projects

Base station construction project
Base station deployment plan
Device technology roadmap development
Device verification system development
New service launches
Network resilience plan
Design and optimization of packet core network functions
Network solutions for 4g and 5g services
Base station installation progress management
Policy proposal lobbying

Hiring Activity

Minimal110 roles · 0 in 30d

Department

Engineering

Ops

Product

Security

Finance

Construction

Data

Legal

Seniority

Senior

Mid

Manager

Lead

Staff

Notable leadership hires: Tech Lead, OSS & Automation Lead, Device Connectivity Lead, Device Technology Lead

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About Rakuten Mobile, Inc.

Rakuten Mobile is a Rakuten Group subsidiary and Japan-based mobile network operator (MNO) founded in 2019. The company operates a 5G network centered on cloud-native and open RAN architecture, positioning itself as an alternative to traditional carrier infrastructure. The operational scope spans network design and packet core optimization, base station deployment and inventory management, device technology roadmap development, and enterprise fixed-line service expansion. Rakuten Mobile serves both consumer and enterprise customers across Japan.

HeadquartersSetagaya-ku, Tokyo

Company Size1,001–5,000 employees

Founded2019

Hiring MarketsJapan

Frequently Asked Questions

What technology does Rakuten Mobile use to build its 5G network?

Rakuten Mobile runs its network on cloud platforms (AWS, Azure, GCP) with Kubernetes container orchestration, open RAN architecture, and cloud-native packet core functions. The stack includes Java, Kotlin, Python, and standard telecom protocols (3GPP, LTE, 5G).

What are Rakuten Mobile's operational priorities?

Current focus areas include base station construction and installation, device technology roadmap execution, packet core network optimization, expanding critical coverage areas, and maintaining service resilience during disasters.