Languages: C, C++, assembly languages, C# OS: LINUX and various proprietary RTOS, SEGGER, etc. Networking: IPV4 Ethernet, IP, DHCP, TCP, UDP, 802.11, ZigBee, Fiber Channel Protocols: SPI, I2C, UART, USB OTG, PCIE Sensors: Accelerometer, Pressure, Temperature, InfraRed Wireless: NFC, ZIGBEE, BLUETOOTH, GPS, RAW Wireless 434MHz, Low frequency Boot loaders: EFI, UEFI, REDBOOT, UBOOT Scripts: Perl, Python, PHP, Java Development Tools: Compilers, Cross Compilers, Tool chains, JTAG, debuggers, various IDEs from vendors, Oscilloscope, GDB, Sniffers, Protocol Analyzers, Traffic generators, CVS, SVN, GIT, Clear Case, Hardware: understanding Schematics, Circuit design for SOC based prototypes and Analog circuit design for sensors interface Hardware Familiarity: ATMEGA 128, Microchip, TI MSP430 Family, Freescale, STM32F, Cortex A8, TI SITARA, OMAP, TI DSP, NXP LPC, ARM Cortex M3, SPARC, POWERPC, x86, ARM CORTEX M4, ISO IEC 14443, TPMS, Intel IXP NPE SBC, Ubiquity radio cards, CHIPCON CC2420, ARM, Power PC, Cisco Switches/ Routers, FC Switch, Altera/ Xilinx based FPGA, Intel Atom,