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Senior Engineer/ Engineer (Mobile Core Operation)

Date:  13 May 2024

StarHub Green

Company:  StarHub Ltd

Job Description

Provide technical and operational support for 4G/5G Mobile Core nodes (Circuit Core/ IMS Core/ SDM-OneNDS/ UDM/ AUSF) and International Roaming related service support.


  • Perform daily operation and administration of 4G/5G Mnetwork elements (Circuit Core/ IMS Core/ SDM-OneNDS/ UDM/AUSF) 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, and update 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 International IREG roaming testing and related support to onboard new roaming partners to ensure good roaming service experience for both inbound and outbound roaming subscribers 



  • Appropriate qualification in Electronics/ Communications/ Networking or equivalent 
  • Good technical knowledge of Mobile 4G/5G Core network and related service/ call flows Camel/ VoLTE/ IMS/ IREG) and associated protocols (SS7/ Sigtran/ Diameter/ SIP)
  • Ability to perform end-to-end network service troubleshooting
  • Working knowledge of Network and Application Securities
  • Basic knowledge of IP switching and routing protocols
  • 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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