Key Responsibilities

• Manage and maintain Linux-based VoIP servers supporting large-scale telecom operations.
• Set up and configuration of Highly available platforms using Corosync/Pacemaker/DRDB
• Deployment and configuration of systems using Llibvirt / KVM
• Deploy, configure, and optimize, Kamailio, Asterisk and FreeSWITCH in production environments.
• Implement and maintain MySQL replication strategies (master-slave and multi-master setups).
• Troubleshoot configuration, call quality issues, latency, and signaling anomalies.
• Automate routine tasks with scripts and configuration management tools.
• Ensure 24/7 uptime and reliability of VoIP infrastructure through proactive monitoring and incident response.
• Collaborate with network, NOC, and development teams to support telecom service delivery.
• Building of packages and maintaining repositories.
• Monitoring and maintenance of co-located hardware.

Required Skills and Experience

• 6+ years of experience as a Linux System Administrator in a telecom or VoIP environment.
• Strong working knowledge of Asterisk, Kamailio, and FreeSWITCH.
• Solid understanding of Network protocols (DNS, IP, SNMP)
• Good understanding of VoIP protocols (SIP, RTP, SDP) and NAT traversal techniques.
• Hands-on experience with MySQL replication and performance tuning.
• Writing of database queries to analyse data
• Proficiency in shell scripting (Bash); experience with Python or Perl is a plus.
• Experience with network tools (tcpdump, Wireshark, iptables) and performance monitoring systems.
• Ability to support production systems in a high-availability environment using tools like Icinga, Cacti, Prometheus and Graphana.
• Ability to manage and configure email systems.

Preferred Qualifications

• Experience with telecom platforms.
• Familiarity with cloud hosting environments (AWS, Azure) and virtualization (KVM, Xen VMware).
• Knowledge of DevOps practices, CI/CD, and infrastructure automation tools (e.g., Ansible, Terraform).
• Awareness and experience with Redis.