saurabh kumar

Software Engineer

Reve systems•  June 2018 - Present

Backend developer for mobile app : Telepacket • Using special tunneling based on SIP/RTP protocols • Protocols Used : TCP, UDP, SSL, QUIC, HTTP,DNS • Underlying logic for tunneling VoIP calls written in Java and C, integrated in the android app. • Tools : Java, C,PJSIP library,Swig Backend Java Developer for Softswitch : TPSwitch • Worked on the Signalling and Radius module of Softswitch • Build a timer library using hierarchical timer wheel concept for packet re-transmission • Build a library which make connection of Radius server with database efficiently • Build a library for handling duplicate packet on network (using LRU concept) • Parsed the SIP request/response and SDP attributes • Tools : Java Worked on Freeswitch product: Ajura • Familer with Freeswitch Configuration and Customization • Familer with Dialplan/XML Programming • Wrote some Lua and perl Scripts and fixed query based error