Profile image of ymams
Flag of Hong Kong Kowloon, Hong Kong
Member since August, 2016
3 Recommendations


Online Offline
I am a program expert and I have 10+ years in programming experiences. my Skill - Objective C. - Java for android. - Xamarin - phoneGap and ionic - Backend Development. - Integration API. - C programming for micro-controllers - 13 years - wordpress, code Ignitor, Magento. - Laravel PHP framework. - Node JS, Vue JS, Angular JS 1.0, 2.0. - Arduino - Bluetooth, Wifi, GSM, Ethernet. - Electronics circuit design - PLC - Microchip PIC - VHDL - bluetooth, wifi, RF, GSM, etc for firmware and smart phone app development. - touch controllers . - Embedded Cortex M0, M3, M4, ARM, AVR - FreeRTOSDevelopment Tools - Eclipse - IAR for ARM 7.4/AVR 5.4 - CooCox ARM Cortex-M - Visual Studio 2008/2010/2013/2015 - Altium - python - GCC - Network technologies - Embedded design of the program (Timers, DMA, external memory, USB, Interrupts , UART….) Thank you for your visiting my profile.
$30 USD/hr
40 reviews
  • 98%Jobs Completed
  • 96%On Budget
  • 99%On Time
  • 16%Repeat Hire Rate


Recent Reviews

  • image of Battlefield1 Project for Ymams A. -- 5 $250.00 AUD

    “Good work, smart solution to a difficult problem with a interrupt trying another interrupt.”

  • image of Microdefenders Project for ymams -- 2 $510.00 USD

    “Ymams is everything I need to complete a project. please do not hire her for your project. I still need her.”

  • image of Battlefield1 Project for Ymams A. -- 4 $720.00 AUD

    “Good smart solution for encryption of the hex file for software distribution. Well done to Ymams.”

  • image of Battlefield1 Project for Ymams A. -- 3 $500.00 AUD

    “Good work. RF bootloader done with transfer hex files by custom USB RF module.”

  • image of Battlefield1 Project for Ymams A. -- 2 $500.00 AUD

    “Really great work. Past developer said loading the hex file by the CC1101 module was impossible Ymams has succeeded, required some smart changes to the standard CC1101 USB dongles and clever coding.”

  • image of Battlefield1 Project for Ymams A. $250.00 AUD

    “Always good to work with a smart professional developer that never gives up trying to find solutions”


Android & iPhone Developer

Jan 2015 - Apr 2016 (1 year)

I developed various apps and games with web.

Digital and Analog Circuit Designer

Mar 2013 - Oct 2014 (1 year)

I developed several control system including schematic and PCB design and firmware on board , PC - side program.

Embedded System Developer

May 2008 - Dec 2012 (4 years)

I developed several embedded systems based on microcontroller,microprocessor and dsp. A system include device, firmware and pc application.



2003 - 2007 (4 years)


  • C++ Level 1
  • US English Level 1


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