Telnyx is seeking an IMS Engineer to design and operate carrier-grade IMS core functions using Kamailio, with a focus on VoLTE expertise and software engineering skills in C. The position is open in multiple locations across Europe and emphasizes a culture of innovation, teamwork, and continuous learning
Job Summary
Telnyx is productizing a carrier-grade IMS core on Kamailio, seeking expertise in P-/I-/S-CSCF functions at a global scale.
The role involves designing, implementing, and operating IMS core functions, with a strong emphasis on VoLTE expertise and the ability to modify Kamailio's C codebase.
Responsibilities include performance tuning, ensuring reliability through HA/DR architecture, implementing security controls, and contributing to the Kamailio community.
Matching Summary
Match Score: 85
Telnyx is seeking an IMS Engineer to design and operate carrier-grade IMS core functions using Kamailio, with a focus on VoLTE expertise and software engineering skills in C. The position is open in multiple locations across Europe and emphasizes a culture of innovation, teamwork, and continuous learning.
Skills & Requirements
Must-have
VoLTE expertise (IR.92, SIP/SDP, QoS)
Core IMS/SIP (3GPP, CSCF roles)
Kamailio configuration and modules
C programming for network services
Linux networking and DNS
CI/CD and observability tools
Nice-to-have
FreeSWITCH/Asterisk experience
RTP/RTCP and media relays
SBC concepts
Diameter protocols
Prior Kamailio upstream contributions
Key Requirements
5+ years with SIP/IMS
Proficient in C for high-performance network services
Experience building and changing Kamailio core/modules