Senior Mobile Core Architect

Key Responsibilities

• Configuration of STPs, DRAs, HLR/HSS, SMSC, SGSN, GGSN/PGW, SBC, etc.
• Manage all equipment on our network alongside the team.
• Use dashboards to discover issues and patterns.
• Follow communications procedures when handling incidents.
• Drive telecom interconnection with providers.
• Maintain, troubleshoot, perform security audits, and respond to emergencies.
• Wireshark trace critical infrastructure for issue debugging.
• Occasional on-call requirements.

Key Qualifications

• At least 10 years’ experience in the core network domain with a mobile networks
• Holding a BSc degree in Telecommunication or Computer Science (post-graduate studies are a bonus)
• 10+ years core telecommunications network experience
• 10+ years of experience with SS7, Sigtran, Diameter, Packet Switched (GGSN/PGw, GTP, GRX, IPX, etc.)
• Circuit switched communications protocols such as SS7 (including SCCP, TCAP, MAP and CAMEL phases 1 to 4), SCTP (SIGTRAN), Diameter, including ability to design and configure voice and messaging flows
• Voice SIP / RTP, ISUP and voice convergence technologies, including IMS (including VoLTE and VoWiFi)
• Knowledge (general) in Voice Mail, IVR and PBX systems / softphones (secondary)
• Hands on with sniffers, Wireshark and testing tools in advanced mode
• Hands on with Linux/Unix based systems (you can find your way around a linux shell)
• Understanding of 3GPP, ITU-T and ANSI standards
• Understanding of roaming agreements and IR.21, including IREG testing
• Online Charging System (OCS) and CAMEL in billing and call control
• Strong writing and documentation skills to develop reports
• Adaptability and responding to change
• Ability to work under pressure
• Fluent in English (written and spoken)
• Ready to work on morning/afternoon shifts
• Good interaction with external customers and internal teams