Job Description

7+ years of hands-on VoIP engineering experience, with a strong focus on carrier SIP trunking and interoperability.
Expert-level knowledge of SIP signaling (INVITE, BYE, REGISTER, re-INVITE, UPDATE, PRACK, REFER, etc.), SDP negotiation, RTP/RTCP, and SIP headers.
Proven ability to troubleshoot complex SIP interoperability issues across different carrier platforms and SBCs.Strong experience with Session Border Controllers (SBCs) and SIP proxies (e.g., Ribbon, AudioCodes, Oracle/Acme Packet, OpenSIPS,Kamailio, etc.).
Proficiency with diagnostic tools: Wireshark, sngrep, Homer/HEP, SIPp, Empirix, etc.
Solid networking knowledge: IP, DNS, subnetting, VLANs, routing protocols.
Strong Linux administration skills for VoIP applications and troubleshooting.
Excellent written and verbal communication skills.

Job Description - Grade Specific