Senior IMS Core Engineer & Architect (VoLTE/VoWiFi)

OXIO; United States; On-site; USD 140,000 - 190,000; Full time

Job summary

OXIO is seeking an IMS Core Engineer/Architect to analyze, configure, and verify integration of IMS/VoLTE nodes within 2.5G/3G/4G networks. You will manage IMS domains, optimize call flows, and perform security audits while supporting 7x24 monitoring as needed.

Minimum 10 years in core telecom networks with strong SIP/Diameter expertise and Linux/Wireshark proficiency. Fluency in English required; on-site work in a fast-paced environment.

Qualifications

• At least 10 years’ experience in the core network domain with a mobile networks.
• Working knowledge of telecom networks like 2G, 2.5G, 3G and LTE (MME, SGW, PGW, and MME).
• Great Conceptual understanding of IMS evolution and trends - IMS Subsystems, functionalities and IMS services call flows.

Responsibilities

• Manage networks and nodes within the IMS domain for 2.5G, 3G & 4G networks (SIP, H323, IMS/IMT, VoLTE, VoWiFi).
• Using dashboards (and building new ones) to clearly and quickly discover issues and patterns.
• Follow communications procedures when handling incidents with internal and external stakeholders.
• Maintenance, troubleshooting, security audits, and emergency response.
• Fault handling and corrective actions on node, service and infrastructure level.
• Handle project activities, implementing/adapting IMS E2E service functionalities, nodes, services.
• Cover 7x24 monitoring shift responsibilities when needed.
• Wireshark tracing to debug issues and providing input for improvements.

Skills

IMS core networks

VoLTE/VoWiFi

SIP/Diameter

Troubleshooting

On-call support

Linux shell

Documentation

2G/3G/LTE knowledge

Education

BSc in Telecommunication or Computer Science

Tools

Wireshark

Sniffers

Linux

Job description

OXIO is seeking an IMS Core Engineer/Architect to analyze, configure, and verify integration of IMS/VoLTE nodes within 2.5G/3G/4G networks. You will manage IMS domains, optimize call flows, and perform security audits while supporting 7x24 monitoring as needed.

Minimum 10 years in core telecom networks with strong SIP/Diameter expertise and Linux/Wireshark proficiency. Fluency in English required; on-site work in a fast-paced environment.