Contract: Mobile Voice Core Signalling Designer - Initial 6 months - Remote (adhoc travel to Reading)

Role Overview
In this role, you will support the design and evolution of mobile voice core signalling platforms, producing end-to-end network designs across IP STP, DSC, IMS, and Legacy voice core environments. You will work closely with project teams, vendors, and engineering stakeholders to deliver scalable, secure, and customer-focused signalling solutions while supporting network transformation and automation initiatives.

Key Responsibilities

• Produce High-Level and Low-Level Designs (HLD/LLD) for core voice and signalling platforms.
• Design and support signalling solutions across IP STP, DSC (DRA/DEA), IMS, and Legacy voice core networks.
• Assess network impacts, capacity planning, and solution modelling for signalling projects.
• Support the development of automated testing capabilities across 5G SA and Legacy core networks.
• Produce Statements of Requirements (SORs), review supplier Statements of Compliance (SOC), and validate vendor designs.
• Collaborate with vendors and internal engineering teams to support network evolution and future roadmap planning.
• Ensure all designs meet operational, security, and fraud prevention requirements.
• Provide technical guidance throughout project delivery and support design governance activities.

Skills & Experience

• Strong experience designing mobile core voice and signalling networks within mobile operator environments.
• Deep understanding of 2G, 3G, 4G, IMS, and mobile core network architectures.
• Strong knowledge of signalling protocols including SS7, SIGTRAN, SIP, Diameter, and MAP.
• Experience producing HLDs, LLDs, capacity models, and technical design documentation.
• Understanding of IP Networking, traffic engineering, switching, and radio principles.
• Experience working with network vendors, reviewing technical documentation, and supporting solution delivery.
• Strong analytical, stakeholder management, and communication skills.

Contract Details

• Duration: Initial 6 months (Likely extension)
• Location: adhoc travel to Reading
• Day rate: £400 - £450 per day (inside)

Contract: Mobile Voice Core Signalling Designer - Initial 6 months - Remote (adhoc travel to Reading)