Kamailio + multiple FusionPBX clustering

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Key Responsibilities: Configure Kamailio as a SIP proxy and load balancer for multiple FusionPBX servers. Ensure proper call routing, failover, and high availability across PBX instances. Implement NAT traversal, authentication, and security policies for SIP traffic. Optimize performance, scalability, and redundancy in a multi-PBX setup. Troubleshoot SIP signaling issues, call routing problems, and integration challenges. Document configurations and provide support for ongoing maintenance. Requirements: 1 - Strong experience with Kamailio – SIP proxy configuration, routing logic, and NAT handling. 2 - Deep understanding of SIP, RTP, and VoIP protocols. 3 - Experience with FusionPBX / FreeSWITCH integration. 4 - Knowledge of dispatcher module for load balancing. 5 - Familiarity with SIP authentication, TLS, and security best practices. 6 - Experience working with MySQL/PostgreSQL for Kamailio configurations. 7 - Ability to debug SIP traces, logs, and call flows using tools like sngrep, tcpdump, Wireshark. 8 - Linux system administration skills (Ubuntu/Debian preferred).

Keyword: Linux