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 experience in core network signalling design within telecoms environments

Hands-on experience with vendor platforms such as:

Ericsson Node solutions

Nokia SDM (Subscriber Data Management)

Deep understanding of:

2G / 3G / 4G / IMS networks

Signalling protocols: SS7, SIGTRAN, SIP, Diameter, MAP

Solid knowledge of:

Networking principles

Traffic engineering and switching

Radio and telecoms theory

Key Competencies

Excellent communication skills with the ability to explain complex technical concepts

Strong stakeholder management across technical and non-technical teams

Self-motivated with the ability to work independently under tight deadlines

Collaborative mindset with experience working across cross-functional teams

Disclaimer
Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.
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