Job Description

● Strong experience with SIP protocol (INVITE, ACK, BYE, REGISTER, REFER,OPTIONS, etc.) ● Practical experience with SIPREC for recording VoIP calls. ● Solid development skills in JavaScript (Node.js). ● Experience working with SIP Servers (e.g., FreeSWITCH, Asterisk, Kamailio,OpenSIPS). ● Hands-on knowledge of WebRTC, RTP streams, and VoIP media handling. ● Experience building and consuming RESTful APIs. ● Familiarity with call flows, SIP traces analysis (using Wireshark, sngrep, or similar). ● Strong understanding of networking basics (UDP, TCP, NAT traversal, STUN/TURN). ● Ability to troubleshoot and debug complex telephony and media issues Show more Show less