Mobile Core Design Specialist - Contract - 6 months - London - Inside IR35
My client, a leading global telecoms company is looking for an experienced Mobile Core/ Packet Core Design Specialist to support a major programme within their core network team. This is a hybrid London‑based role requiring strong 4G/5G core expertise.
Key Skills
Deep understanding of 3GPP 4G & 5G SA Packet Core standards
Strong knowledge of core architecture, protocols & integration
Experience with 4G interfaces (S1‑MME/S1‑U, S4, S6a, S5/S8, SGi)
Experience with 5G SA interfaces (N2/N3/N4/N6, SBA)
Understanding of NFVI, VNFs/CNFs; Kubernetes desirable
Solid IP networking background
Strong troubleshooting and config management skillsRole Overview
Contribute to HLDs/LLDs for MME, GW‑C/U, AMF, SMF, UPF
Support integration with wider network architecture
Provide troubleshooting across multi‑vendor Packet Core
Assist with test support and configuration managementIf this sounds like something you'd be interested in, please apply with your updated CV