Job Title: Voice Signalling Designer - Ericsson Node and Nokia SDM Location: 6 months Salary/Rate:£420-£450 a day Start Date: End of March Job Type: Contract 6 months Overview We are seeking an experienced Signalling Design Engineer to join a high-performing signalling design team within a major telecoms environment. This is an opportunity to work on cutting-edge network evolution initiatives, including IMS, legacy voice, and 5G standalone (5GSA), while influencing strategic design decisions across the business. Key Responsibilities Act as a design authority within signalling-related projects, ensuring optimal delivery outcomes Produce high-level and low-level designs (HLD/LLD) for core voice network platforms Support service design across: IP STP DSC (DRA / DEA) IMS and legacy voice core nodes Contribute to automated testing strategies for 5GSA and legacy networks, improving testing efficiency and call flow validation Perform capacity planning, modelling, and dimensioning across network elements Ensure all designs meet security, fraud, and regulatory requirements Collaborate with vendors to: Produce and review Statements of Requirements (SoR) Assess Statements of Compliance (SoC) Review Scope of Work (SoW) and commercial proposals Support network evolution strategy (1-3 year roadmap) covering hardware, software, and capacity Required Experience & Skills Strong experi...