VoIP / IMS Engineer (Kamailio)

The role

You will design and run IMS cores built on Kamailio: CSCF topology, routing logic, interconnect, emergency calling and voice-quality observability. You will also shape our packaged IMS offering.

What you bring

• Strong SIP and IMS fundamentals; hands-on Kamailio (or OpenSIPS) routing script experience.
• RTP/media handling, SBC and interconnect experience.
• Understanding of VoLTE/VoWiFi call flows and HSS/ePDG integration.
• A habit of instrumenting everything — you notice MOS drops before the client does.