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

- 10–12 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)
🏢 Leading
📍 Chennai