SBA are supporting our Telecommunication client, who are seeking an experienced Mobile Core Signalling Designer to support a major transformation programme across their Voice Core and Subscriber Data Management estate on an initial 6 month contract located in Reading (hybrid).

The ideal candidate will have deep expertise in Ericsson signalling platforms and Nokia SDM, with hands‑on experience designing migrations, integrations, and service deployments within mobile core architecture.

This is a specialist technical role requiring genuine design experience

Essential Technical Skills

Ericsson Platforms (must have):

DSC
IPSTP
HLR
HSS Nokia Platforms (must have):

Nokia SDM experience
VNF and/or CNF experience (either acceptable)
Exposure to subscriber migration (vendor‑to‑vendor or like‑for‑like) General Core Competencies

Strong signalling knowledge
Diameter routing & signalling protocols
Core network design experience
Traffic migration & integration design
Ability to independently produce reliable HLD/LLD artefactsTo apply, please submit latest CV