We are looking for a highly skilled Core Network Engineer to manage and maintain HLR/HSS systems and provisioning platforms in a multi-country telecom environment. The role involves handling SIM lifecycle management, core network provisioning, troubleshooting IMS call flow issues, and supporting operational excellence across telecom network systems.
Key Responsibilities:
Configure, operate, and maintain HLR/HSS systems in a multi-country workplace
Support SIM and voucher management systems operations and maintenance
Handle provisioning of core network components and IT systems
Collaborate with core network teams, architects, vendors, and country operations teams
Troubleshoot and resolve operational issues related to provisioning platforms and HLR/HSS systems
Manage SIM profile provisioning, testing, and lifecycle management
Work with IMS teams to resolve VoLTE, VoWiFi, USSI, and handover-related issues
Perform Wireshark tracing and debugging for infrastructure-related incidents




Support geographical expansion projects through HLR integration and configuration
Drive process automation and operational improvements
Plan SIM capacity and forecast operational requirements
Requirements
BE in Electronics, Computer Science, or related field
***** years of experience in telecom core network operations
Strong knowledge of HLR/HSS, STP, and DRA systems
Experience with IMS call flows such as VoLTE, VoWiFi, and handovers
Hands-on experience in SIM provisioning and SIM profile management
Strong database knowledge in Oracle, SQL Server, or similar platforms
Experience with PL/SQL, UNIX administration, and batch scripting
Knowledge of Wireshark tracing and troubleshooting
Familiarity with AWS or other cloud platforms
Working knowledge of Jira and Confluence
Shell scripting/programming knowledge is an added advantage

📌 Core Network Engineer (Chennai)
🏢 Cynosure Corporate Solutions
📍 Chennai