Candidate should have experience on C/C++, VoIP, Networking, IPOffice Core, Telephony Features, SIP, H323, DECT, (S)RTP/(S)RTCP, TLS, ISDN, Analog trunking/terminals, Linux, Bash, GDB, Diab, GCC, Atlassian Tools (Jira, Confluence, Bamboo, Zephyr), SV...