Junior Mobile Core Support Engineer

OXIO

full-time

Posted on: 1/8/2026

Location Type: Hybrid

Location: Canada

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About the role

Monitor, troubleshoot, and properly escalate real-time core network or infrastructure issues
Maintain and improve the OXIO’s network and provide technical support
Fault investigation and troubleshooting of all issues on the network
Keep the performance of telecom network at optimum levels by ensuring that network/application problems are detected and corrected according to agreed KPI and SLA
Good understanding of Mobile Networks 2G/3G/4G/5G
Troubleshooting complex issues by analyzing end to end call traces
Troubleshooting International Roaming issues
Working together with worldwide mobile operator engineers to make live tests
Creating on-demand dashboards to monitor specific metrics
Technical support to NOC engineers to analyze and solve issues
Liase with MNOs to represent the telecom team on the country
Responsive to L3 telecom incidents, NOC hotline calls and emails
Performs L3-level troubleshooting and resolves or escalates on telecom matters
Development of KPIs and other metrics to monitor key aspects in mobile network performance
Development of training material related to signalling / troubleshooting / best practices
Report and coordinate faults rectification with other operators and service providers
Ability to troubleshoot, document, and assess proper escalation channel and team or group.

10+ years experience working in a telecom environment doing L3 support or similar roles
Protocol signalling analysis and troubleshooting in different protocols and interfaces of 2G/3G/4G/VoLTE networks
Solid understanding of OSI model and TCP/IP networking, both IPv4 and IPv6
Analysis of signalling traces using Wireshark
SS7 signalling network troubleshooting
Proficiency with Grafana, Prometheus, ElasticSearch
Basic Python / Linux / Bash knowledge
Ability to work on a 24/7 on-call rotating roster
Excellent written and verbal communication skills
Excellent interpersonal skills
Proficient English written and spoken.

Benefits

OXIO is committed to fostering a diverse, equitable, and inclusive workplace
We do not discriminate against any employee or applicant for employment based on race, color, religion, sex, national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local law.

Tip: use these terms in your resume and cover letter to boost ATS matches.

L3 supportprotocol signalling analysistroubleshootingOSI modelTCP/IP networkingsignalling traces analysisSS7 signallingPythonLinuxBash

written communicationverbal communicationinterpersonal skills