Job Description
Job Description Purpose: - Provide technical and operational support for 4G/5G Mobile Core nodes (nTAS/MSS/SBC/CFX/HSS/HLR/OneNDS/UDM/AUSF/FW) and International Roaming related service support. Responsibilities: - Perform daily operation and administration of 4G/5G Mobile Core nodes (nTAS/MSS/SBC/CFX/HSS/HLR/OneNDS/UDM/AUSF/FW) and ensure smooth network operation. - Carry out system maintenance activities eg patch installation to improve system performance, system release upgrade. - Develop and review system operations processes, update network and operational documents to ensure operation effectiveness. - Perform system security hardening, vulnerability assessment, and implement the necessary corrections/ processes to mitigate security risks. - Perform proactive monitoring of network service KPIs/ alarms and performance analysis to ensure service quality level. - Perform service troubleshooting and testing with local service providers and overseas roaming partners. Qualifications Requirements: - Degree in Electronics/ Communications/ Networking or equivalent - 5 years exeprience in Telco sector - Good technical knowledge of Mobile 4G/ 5G Core network and related service/ call flows and associated protocols (IMS/VoLTE/SS7/Sigtran/Diameter/SIP/SCTP) - Ability to perform end-to-end network service troubleshooting - Working knowledge of VoLTE roaming and IREG related testing - Working knowledge of Network and Application Securities - Working knowledge of IP switching and routing protocols - Working knowledge of Linux and VM - Basic proficiency in programming and scripting skills - Willing to perform late night maintenance during maintenance window period for release/ upgrade/ software patch installation and project cutover
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