Profile image of Coolman8819
Flag of China Beijing Shi China, China
Member since June 20, 2019
0 Recommendations


Online Offline
I'm a senior electronic engineer with 12++years experience in the design of circuitry incorporating various microprocessors, and development of embedded C/C++ firmware. Also I have much experience working with various type of drones and image processing. I can assist clients in any of the following areas: -Digital and analog electronic circuit design, PCB design(including high-speed and flexible PCB board design), and test. -Embedded microprocessor firmware programming(drivers, application) -Electronic prototyping and transition to product commercialization. - drone and image processing Summary of processors & development tools I use: -Processors: STM series(STM32F0/STM32F1/STM32F/4),Microchip series(dsPIC33/PIC16/PIC18/PIC33), Arduino, Raspberry Pi, Allwinner, BLE,WIFI,ZigBee,etc -Schematic Capture: Altium designer, Eagle,Orcad,Kicad -Programing tools: IAR, Keil,MPLAB-X,Micro C,Quartus,Arduino IDE,CCS,etc. I am always trying to make the best results for our customers. Thank you!
$20 USD/hr
9 reviews
  • 100%Jobs Completed
  • 98%On Budget
  • 98%On Time
  • 50%Repeat Hire Rate


Recent Reviews

  • image of Scott J. Project for Jiang D. -- 2 $200.00 USD

    “I hesitate to say this because I don't want to have others book up his time and I lose out but this guy does quality work!”

  • image of Florian K. Project for Jiang D. -- 2 $60.00 USD

    “He did great work in a short time. Also very fair play if any issues came up. Hope to work with him again.”

  • image of Florian K. Project for Jiang D. $20.00 USD

    “Very cooperative communication and good work”

  • image of Scott J. Create a new circuit board for a QI charging transmitter $500.00 USD

    “I will be hiring again. This guy is superb to work with. Great communication and feedback on the project. Very professional.”

  • image of Ken L. Project for Jiang D. $15.00 USD

    “Jiang D is an expert in embedded software. I had worked Jiang and looking forward to work with him again in the future”

  • image of Jin C. Project for Jiang D. $30.00 USD

    “Jiang is very expert on BLE chip design. Checked all circuits have no issue. Looks his skill is not so simple. Found very good engineer. We will work later again. Thank you very much!”


Circuit Designer and Microcontroller Programmer

May 2010 - Oct 2018 (8 years)

As electronic & embedded engineer, i worked with Switching power design, BLE, Wifi,,etc and manufactured various type of prototypes(including image processing, drones,IPcamera,,etc).


Bachelor of Eelctoric Engineer

2005 - 2009 (4 years)


  • Preferred Freelancer Program SLA


  • Facebook Connected
  • Preferred Freelancer
  • Payment Verified
  • Phone Verified
  • Identity Verified
  • Email Verified

My Top Skills

Browse Similar Freelancers