Mojtaba Sabzevar
President at IPPBX laboratory
Peterborough, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolMojtaba Sabzevar is a VoIP and WebRTC specialist and founder-driven technology leader with over eight years of applied experience designing real-time communication and hosted PBX systems. He leads R&D and technical teams across academia and industry—as President of Revoical and Nasim Telecom and Technical Manager at Ferdowsi University’s IPPBX Laboratory—bringing product-focused innovation in IMS/VoLTE, NGN, and conversational AI for voice. A hands-on engineer, he has contributed significant media-handling features to the widely used Kamailio SIP server (including lrkproxy RTP relaying, TURN support, and behind-NAT enhancements), reflecting deep SIP/SDP and media-path expertise. Currently a Ph.D. candidate researching low-latency DASH streaming over WebRTC, he blends rigorous academic methods with production deployments to improve real-time media quality and security. Based in Peterborough, Ontario, he combines entrepreneurial leadership with persistent open-source contribution and a track record of shipping complex telecom systems. An under-the-radar strength is his ability to translate game-theoretic and NAT traversal techniques into practical carrier-grade features.
7 years of coding experience
12 years of employment as a software developer
High School, Math and Physics, Diploma, High School, Math and Physics, Diploma at َAlghadirDoctor's Degree, Computer Software Engineering, Doctor's Degree, Computer Software Engineering at Azad University (IAU)Associate’s Degree, Computer Software, Associate Degree, Associate’s Degree, Computer Software, Associate Degree at Khayyam Higher Education CentreBachelor’s Degree, Computer Software Engineering, Bachelor’s Degree, Computer Software Engineering at Sadjad UniversityMaster’s Degree, Computer Systems Networking and Telecommunications(IT), Master, Master’s Degree, Computer Systems Networking and Telecommunications(IT), Master at Ferdowsi University of Mashhad
English, Persian
Github Skills (11)
c1710
sip10
sips10
kamailio10
c1110
sdp10
voip10
telephony10
network-programming9
linux8
iot4
Programming languages (2)
Github contributions (5)
kamailio/kamailio
Jan 2020 - Sep 2022
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms -
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits, 16 PRs, 9 pushes in 2 years 8 months
Contributions summary:Mojtaba primarily contributed to the `lrkproxy` module, focusing on features related to RTP relaying and media handling within the Kamailio SIP server. Their work involved modifying SDP (Session Description Protocol) for media address and port manipulation, as well as implementing connection tracking rules. Furthermore, the user added game-theory and behind-NAT support. Finally, the user implemented new features for TURN support and subset of range ports.
voltesip-serverkamailiofreeswitchchat
mojtabaesfandiari/kamailio
Feb 2019 - Mar 2021
Kamailio - The Open Source SIP Server -
Contributions:6 PRs, 35 pushes, 11 branches in 2 years 1 month
sip-serverkamailiofreeswitchsiptelephony
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