I'm an expert in network and multimedia back-end programming with more than 7 years experience. My most recent experience includes developing software in telecommunication area such as media and signaling bridges, transcoders, multimedia conference bridges. I also have expertise in following areas: C, C++, Perl, PHP, JavaScript, Pascal, beginner Python, Unix/Linux software development, bash/sh scripting, Berkeley sockets, winsockets, Windows development, cross-platform/portable code, GUI development with QT library, GNU make, Autotools, CMake, GNU compilers, image processing, audio processing, speex audio processing library (both codec and echo suppression library), audio mixing, multimedia capturing (camera/microphone), digital image processing using OpenCV library, multithreaded/parallel programming, lock and lock-free algorithms, network and network protocols, SIP, RTP, VoIP, writing parsers in Lex/Flex, Boost libraries, gdb (GNU debugger), gprof (GNU profiler), valgrind, interprocess communication (IPC), XML (and xerces-c library), PCAP library, tcpdump and wireshark network analysis tools, microcontroller programming (STM32, AVR). Also I have a fair knowledge of network/system administration, during my last working experience I learned to analyse and improve VoIP multimedia quality and latency.