IMS Core Engineer

Oxio Technologies Inc.

Job Overview

Location

Remote

Job Type

Full-time

Full Job Description

📋 Description

• As an IMS Core Engineer at Oxio Technologies Inc., you will play a critical role in maintaining and evolving the company’s IP Multimedia Subsystem (IMS) and VoLTE infrastructure, ensuring reliable, high-quality mobile communications services for customers across 2.5G, 3G, and 4G networks.
• Your day-to-day responsibilities will include managing IMS network nodes, monitoring system performance via dashboards, conducting Wireshark-based trace analysis, troubleshooting faults, implementing configuration changes, supporting emergency response, and participating in 7x24 on-call shifts to ensure service continuity.
• You will join a specialized mobile core team focused on the evolution and stability of telecom infrastructure, working closely with internal teams and third-party providers to uphold communication procedures and drive continuous improvement in IMS service delivery.
• In this role, you will deepen your expertise in IMS architecture, protocol signaling (SIP, Diameter, SS7), and 3GPP standards, while gaining hands-on experience with core network nodes (HSS, CSCF, MTAS, etc.) and contributing to service upgrades, expansions, and security audits that shape the legacy of Oxio’s mobile network offerings.

🎯 Requirements

• Minimum 10 years of experience in mobile core network domains, specifically with IMS/VoLTE infrastructure and related telecom technologies.
• BSc degree in Telecommunications or Computer Science; post-graduate studies considered a bonus.
• Proven hands-on experience with IMS network nodes including P-CSCF, I-CSCF, S-CSCF, HSS, MTAS, CUDB, MGCF, and CSFB, as well as configuration, troubleshooting, and integration of these elements.
• Strong working knowledge of key telecom protocols: SIP, H.248, Diameter, SS7, ISUP, BICC, and their application in IMS-based services.
• Proficiency with Linux/Unix systems, Wireshark, and other packet analysis tools for deep troubleshooting and trace analysis.
• Solid understanding of 3GPP, ITU-T, and ANSI standards, including roaming agreements and IR.21/IREG testing procedures.
• Excellent written and verbal English communication skills, with ability to produce clear documentation and reports.
• Ability to work under pressure, adapt to changing priorities, and participate in morning/afternoon shifts and on-call support rotations.

🏖️ Benefits

• Opportunity to work remotely with a flexible schedule, supporting work-life balance while contributing to critical telecom infrastructure.
• Engagement with cutting-edge IMS and VoLTE technologies in a evolving mobile network environment.
• Exposure to end-to-end service implementation, from configuration to verification, across multiple core network nodes and protocols.
• Professional growth through involvement in system upgrades, expansions, fault management, and security audits in a live production environment.
• Collaborative team culture focused on technical excellence, knowledge sharing, and continuous improvement in network operations.
• Commitment to diversity, equity, and inclusion, with Oxio fostering a workplace where all employees are valued and empowered regardless of background.

Skills & Technologies

Python

Node.js

Linux

Remote

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Oxio Technologies Inc.

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About Oxio Technologies Inc.

Oxio Technologies Inc. is a Canadian telecommunications company that provides cloud-based connectivity infrastructure, enabling brands and enterprises to launch and manage white-label mobile services. Its platform bundles carrier relationships, billing, support and analytics into APIs, letting non-telcos offer cellular plans under their own brand. Founded in 2019 and headquartered in Montréal, Oxio operates across North America and partners with major networks to deliver flexible, digital-first mobile experiences without owning traditional telecom hardware.

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