Senior Specialist - Roaming And Signaling

Recruiter:

A 1L Realization (Pty) Ltd

Job Ref:

JHB001063/Tshid

Date posted:

Tuesday, October 6, 2026

Location:

Johannesburg, South Africa

SUMMARY:
Our client in the telecommunications sector is looking for a Senior Specialist - Roaming And Signaling contract duration of 6 to 12 months.

POSITION INFO:
Experience Required: 10+ Years of progressive experience managing the implementation, integration, and operations of carrier-level applications and platforms in a variety of technology footprints and geographies and markets. Functional experience in Core platforms including messaging, mobility, roaming, signalling, and related value-added services (VAS) and security. Knowledge of IP, CCNA is an added advantage. Solid understanding of virtualisation and cloud-based solutions and technologies in relation to Roaming, Messaging and Signalling platforms Hands on experience with Roaming, Messaging and Signalling hubs \/ platforms as well as value added platforms. Hands on experience with SMS Routing, Hub and Firewall technology Understanding open connectivity roaming hub and\/or experience working with Data Clearing Houses is a valuable asset. Strong Knowledge on GSM\/LTE\/5G network architecture and signalling architecture (STP's\/DRA\/DEA). Strong Knowledge on End to End architecture and connectivity at solution level including core network, signalling, roaming and VAS. Expert Knowledge of Signalling protocols and standards relating to CAMEL\/GRX\/GTP\/DIAMETER, SIP, RTP, MEGACO, SCCP, GSM MAP and SS7\/SIGTRAN\/ISUP. Understanding of the standard call flows for messaging, roaming Vas and Signalling involving multiple services. Basic understanding of IPX and its positioning with the career network infrastructure. Understanding of IoT platforms, providers and mobile roaming and roaming VAS. Expert in SMS\/SMPP data solutions (A2P,P2A, P2P, RCS, etc). Understanding of billing systems, CDR's, TAP flows, TAP files. Knowledge of UNIX-Solaris, AIX, HPUX, Windows, Linux and cloud technology including containerisation (CNF's). Extensive knowledge of virtualized environments (VNF's), API's. Understanding of other core platform and network areas including voice core, unified communications and collaboration, and related value-added services (VAS) and security. Familiarity with SIP and IP Telephony protocols Understanding of troubleshooting processes for connectivity

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