Senior Specialist - Roaming And Signaling
Job in
Johannesburg, 2000, South Africa
Listed on 2026-10-11
Listing for:
A 1L Realization (Pty) Ltd
Full Time
position Listed on 2026-10-11
Job specializations:
-
IT/Tech
Systems Engineer, Network Engineer, Cloud Computing: Infrastructure & Operations
Job Description & How to Apply Below
- 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 (STPs/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, CDRs, TAP flows, TAP files.
- Knowledge of UNIX-Solaris, AIX, HPUX, Windows, Linux and cloud technology including containerisation (CNFs).
- Extensive knowledge of virtualized environments (VNFs), APIs.
- 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
Position Requirements
10+ Years
work experience
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