Iranian Company in Advertising Industry
Annual Package: 1.5 - 2 billion Tomans
Responsibilities
· Design, develop, and maintain VoIP systems and telephony solutions using Asterisk and SIP.
· Implement and optimize SIP signaling, call routing, SIP trunking, and RTP media flows.
· Develop and maintain backend services and REST APIs for telecom platforms and integrations.
· Configure and troubleshoot PJSIP endpoints, dial plans, codecs, and session parameters.
· Monitor VoIP infrastructure to ensure call quality, system reliability, and service availability.
· Diagnose and resolve complex signaling, audio, networking, and call connectivity issues.
· Integrate telephony systems with external services, communication platforms, and AI-powered solutions.
· Improve system performance, scalability, and development workflows through automation and modern engineering tools.
Requirements
· 5+ years of VoIP or backend experience.
· Hands-on expertise in Asterisk and SIP.
· Strong knowledge of PJSIP and SIP Trunking.
· Understanding of RTP, SDP, and codecs.
· Proficiency in Linux and networking.
· Experience with Wireshark, sngrep, and tcpdump.
· Backend development in Go, Java, Python, or C/C++.
· Familiarity with ARI/AMI, Kamailio, FreeSWITCH, or WebRTC; AI coding assistants and agentic development are a plus.