SUMMARY:

• 12+ years’ experience in conceptualization and development of embedded products and solutions.
• Developed software using C, C++, and Assembly programming languages.
• Experienced in development of embedded software, application, and device drivers.
• Worked on Bluetooth, Digital TV, POS Devices, eBook Devices and Industrial Automation.
• Expertise in design, defines, develop and deploy object - oriented software using C++, OOPS, UML, Design Patterns , SOLID Principles.
• Extensively used designing tools like Star UML, Rational Rose for Object Oriented Design .
• Bluetooth Sniffer: Ellisys and Frontline BT Sniffer, HCI Commands tracer
• Bluetooth Protocol: BT 4.0 (Low Energy), BR/EDR, GATT, ATT, AVDTP, AVCTP, AVRCP L2CAP, HCI, RFCOMM, HID and USB HID.
• BT4.0, BLE, BR/EDR, Bluez 4,5 development, BT HID and HID Voice Profile on BT BLE remote
• Experienced in Build and Script using Make, Package config, ARM Tool chain’s, Cigwin, Shell, Perl.
• IDE used are Visual Studio, DDD, Eclipse, Kiel C Compiler.
• Worked on various operating systems such as MS Windows, LINUX and WinCE.
• Experienced in RTOS, VxWorks.
• Experience working on Code repositories clear case, Perforce, GIT, STASH, JIRA, CQ, CVS.
• Worked on Code Analyzers and Code Coverage tools Bullseye, Gprof and Prevent.
• Used debugging and memory analysis tools GDB, Valgrind, Strace, Ftrace, Windbg, DUMA, DML
• Knowledge of Parallel Programming using CUDA on GPU.
• Experienced in working on IAR C Compiler, Keil C debugger environment, universal Programmer on various microcontrollers such as Intel8051, AT89C52, AVR, UPD 7031000 NEC 850, x86 Processor.
• Worked on various Sensor’s Load Cell, Pressure Sensor, Keypad, Digital Switches, Graphics LCD.
• Experienced with various communication standards such as RS232 and RS485 serial communication standard, I2C, SPI, CAN, USB, DBUS, IEEE1284.
• Developed client server applications using TCP/ Confidential protocol and RPC Agents.
• Expertise in design, development and testing of embedded firmware/software development for real time multithreading/multitasking embedded applications.
• Experienced with various synchronous/asynchronous communication interfaces and protocols and much familiar with the use of associated test and design verification equipment protocol analyzer.
• Expertise on Windows Device Drivers developed Printer, Graphics, SMBUS, USB windows drivers.
• Device Driver Development using WDM, WDF, UMDF, KMDF, COM, Windbg, GDB.
• Worked on WDK (Windows Driver Kit) Tools Usbview, Guidgen, Dbgview, Traceview, Driver Verifier, Poolmon, InfGen, GPDCheck, ChkInf, CertMgr, Inf2Cat, HCK, HLK.
• Expertise on Linux Kernel Driver development for USB,IPC/RPC (binder),KDbus, Bluetooth HID.
• Worked on Linux Device Drivers Character & Misc, Android binder, Ashmem, kdbus, USB.
• Worked on speech to text Nuance Vocon Library and NLP server for Fios STB media search through BT Voice remote.

PROFESSIONAL EXPERIENCE:

Confidential, TX

Sr. Embedded Engineer

• Design and Development of Bluetooth Remote, Develop BT manager, BT Voice From bluez stack and provide to STB Media search engine.
• Nuance Speech to Text Vocon engine and NLP Server
• C++ and Object-oriented software development.
• BT HID and HID Voice Profile on BT remote
• BT4.0, BR/EDR, Bluez 4.98, Bluez 5 development
• BT Remote FW development on BCM20734 BT Chip, audio and keyboard.
• Designed Digital H/W and python script for BT Remote test qualification.
• Debugging STB Kernel Memory Issues, Memory Profiling, Kernel crash dumps

Technologies: C, C++, Python, Shell, Bluez 4, 5, GIT, STASH, JIRA, ARM RVCT 4.0, BT Sniffer, Cygwin, ADK, Linux Kernel 4.1

Confidential,Hillsboro,OR

Sr. Embedded Engineer

• Implement CR’s in driver code for Audio, HID, Low Energy, USB, UART BT Chips’s.
• Debugging BT issues using BT Sniffer Ellisys and Frontline, Ellisys USB Analyser
• Resolve BT issues using HCI sniffer, HCI tracer and ETL Trace view.
• Handling CRs in the BT Stack protocol layers such as BT 4.0 (Low Energy), BR/EDR, GATT, ATT, AVDTP, AVCTP, AVRCP, L2CAP, HCI, RFCOMM, HID and USB HID
• Handling customer issues and implement change request in BT driver for different BT chipsets

Technologies: C, C++, BLuetooth BD/EDR, Bluetooth 4.0 Low Energy, JIRA, CQ, Perl, Linux

Confidential

Chief Engineer

• Implemented Debugging features for Dbus framework, to view connections, blocked processes.
• Implemented a Debugger Manager to Display Menu and get data from debugger thread of all dbus processes
• Support dbus and kdbus driver for tizen dbus IPC.
• Memory Profiling and Performance analysis
• Developed Test framework for check all features

Technologies: C, Linux, Ubuntu, Kernel 3.10, ARM Cross-Toolchain, GCC, GDB, GIT, Prevent, Bullseye, Gprof, RPM Package

Confidential

• Written a middleware library to provide IPC/RPC features referencing android binder framework
• Developed OOPs Classes using Bridge, Singleton Design Pattern for IPC framework.
• Developed Service Manager to maintain namespace list of all services
• Developed classes to implement Thread to Thread, IPC and RPC
• Written Shared Memory classes to transfer large data using ashmem driver.
• Implemented RPC agent client/server to transfer data between arm boards over TCP/ Confidential .
• Implemented Thread Pools, Events, Synchronous and Asynchronous communication
• Written Classes to transfer fd’s between processes.
• Written classes to transfer events to receiver handlers between diff processes.
• Written classes for async service removal notification, cients can register for notifications
• Implemented Wait services in binder driver
• Stabilizing binder kernel driver during deployment.
• Developed Unit Test Framework to test all features, Negative and boundary scenarios
• Developed Perl Script to detect coding error’s like checkpatcp.pl for kernel drivers
• Deployment support and Provide debugging features to library users.

Technologies: C, C++, Shell, Perl, OOPS, UML, STL, Design Patterns, Linux, ARM Cross-Tool chain, NFS, Kernel 3.10, GCC, GDB, CMake, TCP/ Confidential, Prevent, Bullseye, DUMA, DML.

Confidential

• Developed virtual USB client driver and virtual Host Controller driver
• Stabilize USB driver’s on Linux kernel 2.6 and Windows 7 USB driver
• Written DTV Client and Server UI using shadow widget library to export and connect devices
• Written client and server TCP/ Confidential application’s to communicate data and discover devices
• Write user sockets to driver using libsysfs and use them as kernel socket’s
• Implemented client and server library to manage devices on each DTV.
• Support all modes of usb like Bulk, Synchronous, Interrupt, and Control.
• Support all classes of devices like USB Speaker, Mass Storage, Keyboard, camera, Mouse
• Implemented checks to detect devices and network errors.

Technologies: C, C++, WDK, Windbg, Libsysfs, TCP/ Confidential, Wifi, Local Lan, Digital TV Arm Machine, Windows 7

Confidential

• Developed qemu components for realview-pbx board for DTV like network, USB, SCSI disk, 2D Graphics hardware (libgstreamer interface), PCI Support to board.
• Developed Hardware Emulator driver to pass dtv stack calls to libgstreamer on PC.
• Development of Hardware virtualization for data load sharing using PC CPU
• Porting DTV stack on QEMU running DTV Linux kernel 2.6.34.
• Development and stabilizing QEMU Components for DTV stacks
• Porting Linux QEMU to windows using Cygwin to make it run on windows machine

Technologies: C, C++, QEMU 0.14.1, libgstreamer, Cigwin, Hardware Emulator, ARM Cross- Tool chain, DTV Stack

Confidential

• Port DUMA/DML tool for uclibc on MIPS.
• Port LTT tool for uclibc on MIPS.
• Port Compress Coredump for uclibc onMIPS.
• Port strace, ftrace, ltrace, Bootchart,ramzswap for uclibc on MIPS.
• Implemented Test cases to check memory leaks using above libraries.

Technologies: C, Make, Linux, MIPS, Cross-Tool chain, TCP/ Confidential, Uclibc

Confidential

• Port libusb 1.0 to libus1.1.
• Performed regular checks to deploy library.
• Developed unit tests to verify library interfaces.

Technologies: C, Linux, ARM, cross-Tool chain, HD Camera

Confidential

• Written Scheduler UI application according to design specs.
• Written World Clock UI application according to design specs.
• Developed Unit Tests to verify modules
• Programmed storage module to store/retrieve settings and data.
• Resolve deployment issues.

Technologies: C++, FLTK, Linux, Ubuntu, Cross-Tool chain, e- Confidential ARM Hardware

Confidential

• Written printer driver to create images of spooler raw data
• Written 2 modules of unidrv based printer driver, Printer UI page modules driver, Port Monitor.
• Written application to copy images to e- Confidential location.
• Launch application when page print finished by Port monitor.
• Developed Printer properties UI Pages.

Technologies: C, C++, WDK, Windbg, Visual Studio, Windows XP

Confidential

• Written Win 7Extended display driver to display screen data on Photo Frame.
• Written 2 drivers, Launch capture driver to hack Win7 boot sequence and filter driver to catch actual display driver interfaces to create extended memory buffer.
• Implement shared memory frame buffer to write display data.
• Implemented service to capture mouse movement and write it to shared frame buffer.
• Implement application to read display data from shared memory and send to Photo Frame using USB interface.

Technologies: C, C++, WDK, Windbg, WDDM display driver, Windows 7

Confidential

• Written Win XP Mirror and Extended display driver to display screen data on USB to VGA Dispaly
• Implement shared memory frame buffer to write display data.
• Implement driver to create extended or mirrored surface on WINXP machine
• Implement application to read display data from shared memory and send to FPGA board through USB interface.

Technologies: C, C++, WDK, Windbg, Mirror and Extended display driver, USB, Windows XP

Confidential

Senior Software Engineer

• Written Windows XP Embedded SMBUS driver to read/Write two CSS5535 companion chips,
• These chips were connected to PCI Bus, driver read values through PCI offset register’s.
• Written two DLL’s for each chip to communicate to SMBUS driver. These libraries provide abstraction to User space applications.
• Writing application and Interface DLL’s for the drivers to communicate to upper layer.
• Provided Open/read/write/close interfaces to applications through library.
• Implemented state machine for reading, writing data to temperature chips attached to smbus.

Technologies: C, VC++, CS5535 companion chip, Win XP Embedded Hardware Board, DDK, Windbg, Visual Studio, Windows XP

Confidential

• Written windows Unidrv based printer driver for two models of POS Printer.
• Written 3 modules GPD based font’s driver, Printer UI page modules driver, Port Monitor.
• Implemented Printer commands in printer driver port monitor like image, barcode, cut, eject etc.
• Designed and implemented Printer Properties pages.
• Developed font files for printer driver and as well barcode fonts.
• Develop firmware to communicate to CPLD hardware of parallel port IEE1284 protocol which emulates communication for UPD 7031000 NEC 850 series of printer micro controller.
• Performed regular checks to deploy SW on client site.
• Developed Test Programs using Visual studio MFC, VB to check diff features.

Technologies: C, C++, Printer SRP350, SRP 370, NEC 850 (UPD 7031000), CPLD Hardware, DDK, Windbg, Inf Generator, Font Generator, Windows XP

Confidential

• Written program for Graphics LCD module.
• Written program for AT89c8252 Microcontroller, Keyboard & serial modules
• Design and Develop display menu for Graphics LCD.
• Written program to control digital circuitry connected to controller I/O.
• Digital hardware design around microcontroller
• Written program to send/recv commands to pollution checking module.
• Written program to calculate various values for calibration.

Technologies: C, Kiel, Universal programmer, Oscilloscope

Confidential

• Written assembly program for Vibroso Board module, LCD, Keyboard, RS485 serial.
• Developed assembly program for AT89c8252 Microcontroller.
• Design and develop display menu for the controller board.
• Written Programs to control digital board circuitry connected to Controller ports.
• Written Program to gather data from 205 vibration modules and serialize it to PC interface.
• Digital Hardware design around microcontroller.
• Performed regular checks at site for deployment.

Technologies: 8051 Assembly, AT89C8252, Universal Programmer, Oscilloscope