Mobile/Voice/Core Signalling DesignerReading - 2 days on-site, 3 days WFH 580 per day Inside IR35 - rate to umbrella Initial 6-month contract, view to extendOverviewPCR Digital is working with a leading telecoms organisation who are undertaking a major Voice Core and Subscriber Data Management transformation programme. They are seeking an experienced Mobile Core Signalling Designer with strong Ericsson signalling platform expertise and Nokia SDM experience to support the design and delivery of critical core network evolution initiatives. This is a highly technical design-focused role, requiring hands-on experience producing high-level and low-level design documentation (HLD / LLD) and supporting complex core network migrations, integrations, and service deployments.Key ResponsibilitiesSignalling Architecture and MigrationProduce High-Level and Low-Level Design documentation for core signalling platformsDesign and support migration of signalling nodes from bare metal to cloud-based environmentsWork with Ericsson DSC Signalling Controller (5G compliant)Support IPSTP consolidation and virtualisation initiativesDesign traffic migration strategies, new instance builds, and network integrationsSubscriber Data Management (SDM)Support migration programmes retiring Ericsson HLR/HSS platformsDesign solutions to migrate subscriber profiles onto Nokia SDMUnderstand and map subscriber data flows, service dependencies, and associated risksNokia SDM TransformationSupport the transition ..... full job details .....