E2E Solution Architect

This is one of the most technically ambitious transformation programs in Southeast Asia's telecom landscape — and we need the architect to lead it. As E2E Solution Architect, you'll own the end-to-end design and technical execution of migrating a live Ericsson Dual Mode Core network — running 5G SA and 4G EPC simultaneously — from a 2-site NFVi deployment to a resilient, cloud-native 3-site CNIS architecture. Every design decision you make will directly impact network stability, service continuity, and the digital experience of millions of Singtel subscribers. This is a role for a technical authority who can lead from the front — with customers, with engineers, and in the boardroom.

Responsibilities

Own the Architecture — End to End; Define and govern the target-state architecture across 4G EPC, 5G SA Core, Signalling, Charging, Subscriber Data Management, and Cloud Infrastructure; Develop HLDs, LLDs, migration strategies, and rollback plans; Lead the Transformation; Drive the full migration from NFVi (CCD/CEE) to CNIS — planning and executing multi-site traffic migration, ISSU strategies, disaster recovery, and failover scenarios; Be the Design Authority for Cloud-Native; Own governance of Kubernetes cluster design, CNF onboarding, networking, storage, security, and observability; Drive N+1/N+2 resiliency and geo-redundancy requirements; Govern Lifecycle & Automate Everything; Define software upgrade and lifecycle strategies, lead EOM modernisation roadmaps, and govern CI/CD and GitOps deployment frameworks; Push for Infrastructure-as-Code, automated validation, and MOP automation; Lead Technical Governance; Chair architecture reviews and design authority forums; Conduct risk assessments for major transformations and CABs; Ensure alignment across Core, Cloud, Transport, OSS, and Security; Be Singtel's Trusted Technical Advisor; Engage directly with the customer's CTO, architecture, and operations teams; Present transformation roadmaps, solution strategies, and architecture evolution at executive steering committees

Requirements

5G & 4G Core Expertise; Deep hands-on knowledge of Ericsson 5G SA Core — AMF, SMF, UPF, PCF, NRF, UDM, AUSF, CHF, SCP; Strong expertise in 4G EPC — MME, SGW, PGW, PCRF, HSS, OCS; Experience with IMS, Signalling, Charging, and Subscriber Data Management; Cloud Native & Infrastructure; Expert-level knowledge of Ericsson CNIS, CCD, CEE, Kubernetes, CNFs, and OpenStack-based NFVi; Strong grounding in storage, networking architecture, and service mesh concepts; Automation & DevOps; CI/CD pipeline design, GitOps, Ansible, Helm, Terraform, ArgoCD, Jenkins — you build automation, not just processes; Networking & Observability; IP Networking, Diameter, HTTP2/SBI, DNS, Load Balancing, and Network Security; Monitoring, alerting, log analytics, capacity planning, and performance management; Experience; 12–15+ years in Telecom Core and Cloud domains; 5+ years in 5G Core architecture; Proven track record in large-scale operator transformation programs in Tier-1 environments; Strong executive presentation and customer-facing skills