Senior Engineer (Mobile Core Operations)

Starhub Ltd; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

Starhub Ltd is seeking a Senior Engineer (Mobile Core Operations) to perform operation and administration support for 4G/5G core nodes, including monitoring, troubleshooting, and security hardening. The role covers release upgrades, patching, and process documentation to maintain service quality.

Responsibilities include proactive KPI monitoring, Roaming and signaling support, and collaborating with content providers.

Qualifications

• Experience with 4G/5G core networks and related signaling protocols.
• End-to-end network service troubleshooting experience.
• Ability to perform security hardening and vulnerability remediation.
• Flexible for late-night maintenance windows and project cutovers.

Responsibilities

• Perform Operation and Administration support for 4G/5G Mobile Core nodes to ensure smooth network operation.
• Perform system maintenance activities, such as system release upgrade and patch installation to improve system performance.
• Develop and review system operations processes and maintain operational documents to ensure operation effectiveness.
• Perform system Security Hardening, Vulnerability Assessment and implement corrections to address security risks.
• Perform proactive monitoring of network service KPI/alarms and analysis to ensure service quality.

Skills

Mobile Core 4G/5G

SMSC/SMSGW

Troubleshooting

Security hardening

Monitoring & analytics

SS7/Sigtran/Diameter/SIP

Linux

Scripting basics

Tools

Linux

VM platform

Job description

Select how often (in days) to receive an alert:

Senior Engineer (Mobile Core Operations)

Date: 19 Jul 2026

Location: SG

Job Description

• Perform Operation and Administration support for 4G/5G Mobile Core nodes (SMSC/SMSGW/MNP/STP/SMSF/VAS services) to ensure smooth network operation.
• Perform system maintenance activities, such as system release upgrade and patch installation to improve system performance.
• Develop and review system operations processes and maintain operational documents to ensure operation effectiveness.
• Perform system Security Hardening, Vulnerability Assessment and implementing the necessary correction / process to address / mitigate security risks.
• Perform proactive monitoring of network service KPI/alarms and performance analysis to ensure service quality level.
• Perform troubleshooting of local/ roaming sms issue or Roaming partners related testing and support
• Lasie with content provider on connectivity and related work.

Qualifications

• Appropriate qualification in Electronics/ Communications/ Networking or equivalent
• Good technical knowledge of Mobile 4G &5G Core network and related service /call flows 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
• Basic knowledge of Linux and VM platform
• Required to work during late night maintenance window period for release upgrade/software patch installation and project cutover.