Junior Mobile Core Support Engineer

Responsibilities

• Monitor, troubleshoot, and escalate real-time core network or infrastructure issues
• Maintain and improve the network and provide technical support and fault investigation
• Analyze end-to-end call traces in protocols such as MAP, TCAP, DIAMETER, SIP, and GTP
• Troubleshoot international roaming issues for voice and data
• Collaborate with worldwide mobile operator engineers for live tests and root cause analysis
• Create on-demand dashboards to monitor metrics and validate service restoration
• Provide L3-level troubleshooting and respond to NOC hotline calls and incidents
• Develop KPIs and training materials related to signaling and best practices

Requirements

• 10+ years of experience in a telecom environment performing L3 support or similar roles
• Expertise in protocol signaling analysis for 2G/3G/4G/VoLTE networks
• Solid understanding of OSI model and TCP/IP networking (IPv4 and IPv6)
• Experience analyzing signaling traces using Wireshark
• Proficiency with SS7 signaling network troubleshooting
• Experience with Grafana, Prometheus, and ElasticSearch
• Basic knowledge of Python, Linux, and Bash
• Ability to work on a 24/7 on-call rotating roster
• Excellent English communication and interpersonal skills

About the Company

OXIO is a dynamic telecom company committed to fostering a diverse, equitable, and inclusive workplace where all employees feel valued and empowered.