Description
Cisco's Customer Experience (CX) Professional Services is at the forefront of the global 5G revolution. We partner with Japan's tier-1 mobile network operators (MNOs) to architect, deploy, and optimize mission-critical 4G/5G mobile packet core networks and cloud-native mobile infrastructures.
As a Customer Delivery Architect for Mobility & 5G, you will serve as the principal technical authority and trusted advisor leading the end-to-end architectural design, validation, and commercial deployment of Cisco's 5G Standalone (SA) / Non-Standalone (NSA) Converged Core and Cloud-Native Network Functions (CNF).
Responsibilities:
- 5G Core Architecture & Solution Design: Lead the architecture, design, and integration of Cisco 5G SA/NSA Core solutions, Converged Packet Core (vEPC / 5GC), and Control and User Plane Separation (CUPS) architectures for major Japanese telecommunications carriers.
- Cloud-Native & User Plane Engineering: Architect high-throughput, low-latency 5G User Plane Functions (UPF) and Service-Based Architecture (SBA) control planes running on modern container platforms (Kubernetes / OpenStack / Bare-metal Telco Cloud).
- End-to-End Call Flow & Protocol Design: Define detailed signaling call flows, session management, policy control, charging (CHF/Diameter), subscriber data management, and network slicing across 3GPP (Rel 15/16/17) standards.
- PDI Delivery & Cutover Governance: Act as the lead delivery architect across the full project lifecycle (Plan, Design, Implement)-directing lab staging, PoC benchmarks, migration strategies, operational runbooks, and real-time risk decision-making during high-stakes maintenance windows.
- Strategic Advisory & Trusted Partnership: Partner closely with telco engineering directors, CTO office stakeholders, Cisco Account Teams (AM/CSM), and specialist SEs to shape multi-year technology roadmaps and drive architectural evolution.
- Technical Leadership & Mentorship: Guide and mentor senior consulting engineers, drive delivery quality control, and collaborate with global development teams (Mobility BU / TAC) to resolve critical software and protocol roadblocks.
Requirements:
- 8+ years of hands-on technical experience in Service Provider mobile packet core architecture, engineering design, or delivery (4G LTE EPC, 5G NSA/SA Core).
- Deep technical mastery of 3GPP mobile core protocols and interfaces: 5G SBA (HTTP/2, REST APIs, JSON), PFCP (N4/Sx), GTP-C/GTP-U, Diameter, RADIUS, and BGP/MPLS routing.
- Proven track record architecting or deploying core network functions: UPF, SMF, AMF, NRF, PCF, MME, SGW, PGW, and ePDG/N3IWF.
- Hands-on experience with Telco Cloud and virtualization platforms hosting VNFs/CNFs (Kubernetes, Docker, OpenStack, KVM, SR-IOV, DPDK/CNDP).
- Experience leading mission-critical network cutovers, major software migrations, and performance benchmarking for tier-1 telecommunications carriers.
- Native or business-level fluency in Japanese (client executive presentations, SOW scoping, and technical documentation) with professional working proficiency in English (collaborating with global BUs and international delivery teams).
Benefits:
- Competitive salary
- Opportunities for growth and development
- Collaborative and dynamic work environment