Role & responsibilities
Must-Haves
Strong VoIP Protocol Knowledge - SIP, RTP, WebRTC
Hands-on VoIP Platforms - Asterisk or Freeswitch (Kamailio/OpenSIPS is a bonus)
Programming in Golang (preferred) OR Ruby / C++ with willingness to learn Golang
Networking Fundamentals for VoIP - NAT traversal, ICE/STUN, L2/L3 routing
Cloud Experience - AWS (preferred) or GCP/Azure
Linux Proficiency (deployment, debugging, and scripting)
Nice-to-Haves
Kamailio/OpenSIPS expertise
SIP testing tools
Elasticsearch + Grafana/Kibana
DevOps tools (Terraform, Kubernetes, Ansible, Jenkins)
Android/iOS VoIP client development

Keyskills: VOIP SIP Webrtc Golang C++ C Freeswitch Asterisk Ruby Kamailio RTP