HLR/HSS/UDM Architect

Responsibilities

• Manage and operate HLR, HSS, UDR, and UDM nodes across 2G, 3G, 4G, and 5G core domains
• Design and maintain subscriber provisioning workflows including IMSI/MSISDN management and roaming configurations
• Implement and verify MAP, Diameter, and HTTP/2-based interfaces
• Build and use dashboards to monitor subscriber node KPIs and identify abnormal conditions
• Own incident management for the subscriber data domain and coordinate with external vendors
• Perform maintenance, security audits, patching, and emergency response for subscriber platforms
• Conduct protocol trace analysis using Wireshark or tcpdump on Diameter, MAP, and HTTP/2 signaling
• Lead project activities including E2E introduction of new nodes and capacity expansions
• Support MVNO onboarding by configuring subscriber data repositories and roaming agreements
• Participate in a 7x24 on-call rotation and maintena...