Senior Engineer - 5G Cloud

Core Network Operations Department is responsible for the operation of Rakuten Mobile’s fully virtualized network. We manage critical infrastructure, including IMS (IP Multimedia Subsystem), RCS (Rich Communication Services), EPC (Evolved Packet Core), International Roaming, IoT, and Emergency Services. Our mission is to ensure the continuity, reliability, and availability of these services through advanced automation and AI-driven operational frameworks. The team consists of 50+ highly skilled Technical SMEs, Operations Engineers, Project Managers, and Problem Managers working within a VNF/CNF-based fully virtualized core network environment.

With the launch of 5G SA services, we are initiating 5GC operations and require specialized talent to lead this transition.

As core technology becomes increasingly complex and we migrate toward cloud-native architectures, we need to reinforce our team to ensure uninterrupted and reliable service delivery using AI and automation.

Due to our expanding customer base and the adoption of cutting-edge technologies, we are seeking additional resources to manage the increasing operational demands.

Provide L2/L3 level troubleshooting support for 5GC E2E operations.

Resolve technical issues related to core and cloud infrastructure, including vendor-specific product support.

Manage and resolve complex customer issues escalated from the monitoring support team.

Perform in-depth audits and implement improvement plans.

Conduct regular technical analysis to ensure service optimization and quality.

Collaborate with internal teams, partners, and vendors to resolve technical issues and implement corrective actions.

Conduct configuration testing and verification to ensure compliance with regulatory and service requirements.

Analyze service/operational KPIs, generate reports, and contribute to process and procedure improvements.

Document and maintain detailed records of support activities, including resolutions and troubleshooting steps.

Execute configuration changes and manage communication across different domains.

Build and maintain a knowledge database to enhance daily operational efficiency.

Identify and fix incidents within the agreed Service Level Agreement (SLA).