About the job
We are seeking an experienced L2 IMS Core Engineer with a strong background in VoIP/IMS Core entities, such as P/I/S-CSCF, HSS, and SLF, along with expertise in VoLTE. The ideal candidate will have extensive experience in SIP call processing and supplementary services, as well as a deep understanding of telecom protocols and technologies including SIP, SDP, H.248, MGCP, and DIAMETER. Familiarity with IMS evolution, subsystems, functionalities, and call flows is essential.
Additionally, candidates should have experience with TLS, TCP, IPSEC, and IP protocols, and be adept at integrating and working with various components of a next-generation IP architecture, including soft switches, gateways, SIP proxies, route engines, IP media servers, and IP phones/IADs. Knowledge of IMS interworking entities and their interfaces, as well as session border controllers, NAT, firewalls, and L2 layer switches, is required.
For the L2 IMS Application Engineer role, we are looking for individuals with a good understanding of IMS subsystems interfaces and protocols. Candidates should have in-depth knowledge of telecom protocols and experience with GUI configurations of IMS core entities. Familiarity with WebRTC/WebSockets, Ericsson's MTAS, MIO, WCG, and IMS Application Servers (CAMEL/IS41) is a plus. Knowledge of DHCP and DNS server configurations, as well as debugging application layer logs, is also necessary.

