Overview
Join to apply for the Core Voice Signalling Designer role at Virgin Media O2.
Location: Birmingham, Leeds, London, Manchester, Peterborough, Reading
Job Family: Digital & Technology
Job Type: Full Time
Posted Date: 05-Sep-2025
Ref #: 68455
We have a great new role for a Core Voice Signalling Designer to join our Signalling Design team.
You will help design and steer designs for signalling-related projects, directing project teams to ensure optimal delivery outcomes. The Signalling Design team drives design changes across all impacted network functions as part of a project team, ensuring the overall design is customer-centric, meets customer requirements, and is robust.
We are looking for a candidate experienced in the design and configuration of Ericsson IP-STP and DSC signalling products.
You will work independently, escalating issues to the Signalling Engineering Manager as dictated by complexity and priority.
Key responsibilities
* Working within the Design team to produce the Signalling Design requirements pertaining to core voice network platforms. This role encompasses the support of service designs on the Voice Core network, including IP STP, DSC (DRA, DEA), and IMS/legacy core voice network nodes.
* Helping with the development of automated test capabilities for both 5GSA and legacy nodes. Working with the Core Test team to develop automated testing for call flows to speed up all aspects of testing.
* Producing high and low level design documents, including capacity dimensioning and modelling with close attention to surrounding network elements. All designs produced are to meet fraud and security requirements and liaison with vendors and TSA as required.
The must-haves
* Ericsson IP-STP design and configuration experience.
* Ericsson DSC design and configuration experience.
* Working knowledge of the command structure and ability to navigate Ericsson documentation for both platforms.
* Good experience of cellular networks (2G, 3G, 4G, and IMS), networking principles, and associated signalling systems and protocols, including SS7, SIGTRAN, SIP, Diameter, and MAP.
* Detailed understanding of technology standards, traffic, switching, and radio theory/principles.
* Strong analytical skills and practical judgement to navigate complex requirements and deliver a satisfactory business solution.
The other stuff we are looking for
* An enthusiastic, self-motivated team player with drive to succeed.
* Excellent communications skills with the ability to explain detailed technical concepts and design principles.
* A strong collaborator, able to work with multi-disciplined internal teams and external customers.
* Ability to work alone when required; strong self-discipline to meet tight deadlines.
What’s in it for you
Virgin Media O2 aims to celebrate our people and foster an inclusive culture. We offer a generous reward package with benefits to support you and your loved ones.
Next steps
If we feel like a place where you can belong, we’d love to learn more about you and your experience. If successful, the next steps may include a competency interview. Please note adjustments can be requested to support the recruitment process.
All roles require a criminal record check and some roles require a financial probity check. Your recruiter can provide more information if needed.
Seniority level
* Mid-Senior level
Employment type
* Full-time
Job function
* Design, Art/Creative, and Information Technology
* Industries: Telecommunications
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