The Role:



We're looking for a talented C/C++Telephony Engineer to join our Telephony team.



The Location:



We welcome on-site candidates to work in our offices (Chicago, Dublin, Warsaw or Sao Paulo) as well as remote candidates from anywhere in the world. We offer flexible working schedules.

In this role you will:

• Contribute to and interface with open source VoIP applications including FreeSWITCH, Kamailio, OpenSIPS and RTPEngine through adding features, writing integrations, implementing new modules, optimizing, correcting and extending existing functionality


• Identify, optimize and resolve issues related to latency, scalability and performance


• Create tools to automate critical aspects of production systems


• Design and implement highly available telephony services

• 5+ years of professional software development experience with C or C++ building multithreaded and highly performant client/server applications


• An understanding of IP telephony and Networking protocols (SIP, RTP, RTCP, T.38, ISUP, TLS, STUN, TURN, WebRTC)


• Familiarity with FreeSWITCH, Kamailio, OpenSIPS, RTPEngine, and other major VoIP projects 


• Experience designing, building and maintaining distributed applications at scale


• Expertise leveraging modern libraries such as Boost


• Familiarity with automake and autoconf build systems


• Deep knowledge of microservice architecture patterns and anti-patterns