Profile image of dalong243020
Flag of China Harbin, China
Member since June 15, 2019
2 Recommendations


Online Offline
I'm a qualified Software(C++ /Embedded System) and electronics engineer having rich 18 years+ experiences. Have worked with following peripherals & technologies: - Schematic and PCB Layout using Altium designer, Cadence, Eagle, and so on. - Multi Layer, Flexible, High speed PCB design - Exceptional C++/C /C# programming skills. - FPGA design using Verilog/VHDL (Xilinx ISE/XPS/SDK/Vivado, Altera Quartus, iCECube) - ARM, DSP, MCUs, Arduino experience. - MPU: Pic16F, Pic18F, Pic33F, Atmega8,16,128,32,8051,8951,8052,80251 - Single board computer: Raspbery pi, Beaglebone, NanoPi - Strong with UART, I2C, SPI, BLE,BT, GSM/GPRS/GPS, xBee, ZigBee. - Especially full experience for BLE HM10, HC05, ESP32, DA14580, nRF52832, 52840, BlueNRG, Developed numerous C libraries for using sensors and shields with STM32 ARM and have experience of creating a device from scratch, doing both firmware and PCB development (Autodesk Eagle CAD). Kind regards.
$30 USD/hr
8 reviews
  • 100%Jobs Completed
  • 94%On Budget
  • 100%On Time
  • 17%Repeat Hire Rate


Recent Reviews

  • image of Menachem O. Electric Toy Car for children $3060.00 USD

    “Jin is excellent!”

  • image of Scott J. Project for Jin Q. $500.00 USD

    “This was the second bidder on my original project. I ended up hiring someone else but that freelancer got booted from FL for some unspecified reason. I had a completed project that needed a small adjustment done to it. Jin said that it would be a huge amount of work and take a long time so the original bid to build the project was required. I didn't have time to completely re-invent the wheel so I hired him. I got the project back in hours but was charged the full price to build the original board. I don't know if it worked because the IC company stopped making the chip I needed so I ended up scrapping the whole project and am going to have to restart it form scratch again. He then wanted to move every conversation off to skype which was a detriment if anything were to go wrong; FL would not have known. He was annoying as hell in the amount of spam messages coming my way. I was hoping Jin would have been a long term person to work with but I'll never hire him again; he's a ripoff artist.”

  • image of Avinash S. Project for Jin Q. -- 2 $1500.00 USD

    “Great work as usual. Lot of communication and clear goals. Looking forward to working more with Jin.”

  • image of Avinash S. Project for Jin Q. $500.00 USD

    “Developed on time.......Communicates and asks proper question. Very involved and likes to improve project in general.”

  • image of Alan J. Project 20100905 has been deleted $150.00 USD

    “Did circuit simulation work quickly and was very responsive.”

  • image of Avinash S. Circuit Design and Simulation - Automotive Electronics $500.00 USD

    “Good Work.....very helpful!”


Mobile(iOS/Android/Webserver) development

Jan 2016 - May 2019 (3 years)

As I am a skillful software developer, I have developed mobile apps with backend.

Camera Target Detection System & Drone Control System Develop

Mar 2015 - May 2019 (4 years)

I'v worked on developing Camera Target Detection System & Drone Control System Develop... And then gained a good experiences. In developing team, my level stays on top. So the company got the excellent Profit.



1983 - 1989 (6 years)