Manage IT risk and security operations, including risk assessment, incident management, and policy development.
About this role
This senior engineering role sits in Rakuten Mobile’s Core Network Operations Department, which operates a fully virtualized mobile core supporting IMS, RCS, EPC, international roaming, IoT, emergency services, and the 5G standalone core. The team works across VNF/CNF-based network and cloud infrastructure to maintain service reliability.
The engineer provides L2/L3 support for end-to-end 5G Core operations, troubleshoots core and cloud infrastructure and multi-vendor Packet Core products, handles escalated customer issues, audits services, analyzes operational KPIs, and implements corrective and process improvements. The work includes configuration testing, technical documentation, knowledge-base maintenance, and coordination with internal teams, partners, and vendors. Named technologies include Kubernetes, 5GC, CNF, IMS, EPC, Diameter, GTP, SIP, RTP, and IP-based protocols.
Applicants must have at least 10 years of experience in mobile core network operations or planning, hands-on experience with 5GC and multi-vendor Packet Core products, hands-on container-based infrastructure experience including Kubernetes, and strong knowledge of automation and AI frameworks.
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