We are looking for an experienced VoIP Developer with strong expertise in Kamailio/OpenSIPS, SIP-based communication systems, and a solid understanding of IMS/Diameter. The ideal candidate will have hands-on programming experience in C/C++, strong debugging skills, and the ability to work on large-scale communication platforms.
Key Responsibilities
Develop and maintain VoIP applications and SIP-based communication solutions.
Work with SIP/SDP, RTP/SRTP, TLS, Diameter, and related communication protocols.
Troubleshoot and resolve issues related to signaling, media, networking, and system performance.
Collaborate with cross-functional teams for feature development and platform enhancements.
Perform code reviews and ensure high-quality deliverables.
Work with databases (MySQL, MongoDB) for configuration, logging, and provisioning.
Contribute to design discussions and provide technical guidance when required.
Required Skills
Strong understanding of TCP/IP, VLAN, L3 VPNs.
Excellent knowledge of SIP/SDP, RTP/SRTP, TLS protocols.
Hands-on experience with Kamailio or OpenSIPS (mandatory).
Programming experience in C/C++ (mandatory).
Good understanding of Diameter protocol.
Experience with MySQL and MongoDB.
Knowledge of IMS call flows.
Understanding of PBX/Enterprise Communication Server features.
Strong troubleshooting, problem-solving, and debugging skills.
Good written and verbal communication skills.
Nice-to-Have Skills
Experience with Inter-process communication, API design, message queues.
Exposure to FreeSWITCH, Asterisk.
Experience in building VoIP components like SoftPBX, Voicemail, ACD, IVR systems.
Knowledge of scripting and programming languages: Python, PHP, JavaScript, Java.
Strong knowledge of Linux systems, server administration, Linux command-line tools.
Understanding of firewalls, security, networking concepts.
* Familiarity with tools like CMake, Git.
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