IMS Core Engineer

OXIO

IMS Core Engineer focusing on mobile network integration and management with advanced troubleshooting skills. Collaborating with teams to enhance IMS functionalities and network performance.

Posted 6/23/2026full-timeRemote • 🇺🇸 United StatesSeniorLeadWebsite

Tech Stack

Tools & technologies

LinuxNode.jsPythonUnix

About the role

Key responsibilities & impact

Analyze, prepare, implement and verify the configuration and integration of a node, network and/or system
Manage networks and nodes within the IMS domain for our 2.5G, 3G & 4G networks
Using dashboards to clearly and quickly discover issues and patterns
Follow the communications procedures in place when handling an incident
Maintenance, troubleshooting, security audits, and emergency response
Undertake fault handling and corrective actions on node, service and infrastructure level
Handle project activities, implementing / adapting (new) IMS E2E service functionalities, nodes, services
When needed, cover the 7x24 monitoring shift responsibilities
Wireshark tracing of critical infrastructure to debug issues
Provide input, implement and verify improvements in processes and work instructions
Verify and implement configuration changes
Work to identify and drive improvement

Requirements

What you’ll need

At least 10 years’ experience in the core network domain with a mobile networks
Holding a BSc degree in Telecommunication or Computer Science (post-graduate studies are a bonus)
Working knowledge of telecom networks like 2G, 2.5G, 3G and LTE
Great Conceptual understanding of IMS evolution and trends
Great knowledge of IMS network topology
Worked on different type of Core Nodes
Experience with SS7, ISUP, BICC, SIP, H248, Diameter signaling & protocols configuration change IMS
Operation and maintenance of IMS platforms for Alarms, faults/abnormal conditions handling
Configuration preparation & implementation for configuration changes requests for IMS nodes
Hands on with sniffers, Wireshark and testing tools in advanced mode
Hands on with Linux/Unix based systems
Understanding of 3GPP, ITU-T and ANSI standards
Understanding of roaming agreements and IR.21
VoLTE Troubleshooting and call trace analysis
Strong writing and documentation skills
Adaptability and responding to change
Be able to work under pressure
Fluent in English (written and spoken)
Ready to work on morning/afternoon shifts
Good interaction with external customers and internal teams
2+ years scripting experience (Python, Bash, etc.)

Benefits

Comp & perks

OXIO is committed to fostering a diverse, equitable, and inclusive workplace where all employees feel valued and empowered.
We believe that diversity in all its forms drives innovation and creativity, and we strive to create an environment that reflects and celebrates the unique backgrounds, perspectives, and talents of our employees.
We do not discriminate against any employee or applicant for employment based on race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local law.
We are dedicated to providing a work environment free from discrimination and harassment.

ATS Keywords

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Hard Skills & Tools

network managementIMS configurationfault handlingVoLTE troubleshootingSIPDiameter signalingLinuxscripting (Python, Bash)Wiresharktelecom protocols

Soft Skills

strong writing skillsadaptabilityability to work under pressuregood interaction with customerscommunication skills

Certifications

BSc in TelecommunicationBSc in Computer Science