Job Title: Voice Signalling Designer - Ericsson Node and Nokia SDM
Location: Reading
Start Date: End of March
Job Type: Contract 6 months + 6 months likely to extend
I am working with a leading telecommunications provider, delivering reliable and high‑speed connectivity solutions to both businesses and consumers. Its services include mobile, broadband, and network infrastructure, supporting seamless communication in an increasingly digital world. With a strong focus on innovation and customer experience, the organisation enables clients to stay connected, productive, and future‑ready.
We are seeking an experienced Mobile Core Signalling Designer for a major Voice Core and Subscriber Data Management (SDM) transformation programme in Reading.
Key Responsibilities:
* Design and produce HLDs/LLDs for Ericsson and Nokia signalling platforms
* Lead migrations of Ericsson DSC, HLR/HSS, and IPSTP nodes to cloud‑based or virtualised environments
* Design subscriber data migration solutions from Ericsson HLR/HSS to Nokia SDM
* Collaborate on Nokia SDM CNF transformation (VNF → private cloud)
* Integrate and consolidate signalling nodes while ensuring 5G compliance
Essential Skills & Experience:
* Ericsson Platforms: DSC, IPSTP, HLR, HSS – hands‑on design & migration experience required
* Nokia Platforms: SDM, VNF/CNF deployment, subscriber migration experience required
* Strong signalling knowledge, including Diameter routing & protocols
* Proven ability to produce high‑quality HLD/LLD artefacts independently
* Core network design and traffic migration/integration experience
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.
Equal Opportunity
Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
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