VoIP Developer - C/C++ Programming

Posting title : VoIP Developer (Kamailio-focused)

Experience : 3- 8 Years

Location : Remote

Primary skills : VoIP, Kamailio, IMS, Diameter, C/C++ programming

Qualification : Any Technical Degree

Role Overview :

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.