Mobile Core Design Specialist - 4G/5G

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 m...