Nov 2021 - Now

Software Engineer  Google

Jul 2017 - Sep 2021 

Senior Software Engineer  Flo Technologies, inc.

Embedded Linux

• Familiar with TI am335x, BeagleBone and Yocto
• Integrated mender with u-boot. Initialized hardware at the earlier stage
• Ported lcd driver to u-boot. Familiar with tilcdc driver
• Implemented driver for flow sensor, PT sensor and tri-color leds
• Familiar with Sysvinit, Systemd, dbus
• Implemented HAL, daemons, apps in go and python
• Familiar with mqtt, WebSocket, restful API
• Familiar with RxRust, Asyncio
• Familiar with sqlite ORM. Includes peewee(py), GORM(go)
• Open source project porting
  • Ported numpy, scipy, pandas, scikit-learn to yocto
  • Ported rust-qt/ritual to yocto
• Investigated and fixed the most complicated issues

MCU · RTOS

• Familiar with esp32, FreeRTOS
• Implemented ulp program which is written in Assembly
• Implemented HAL and framework for easily porting
• Implemented http client and server

Software Development

• Agile Development, Jira, Git Flow with github and gitlab
• CI/CD: Nightly build or trigger a build when the code is changed

Jul 2017 - Sep 2021 

Senior Software Engineer  Flo Technologies, inc.

Embedded Linux

• Familiar with TI am335x, BeagleBone and Yocto
• Integrated mender with u-boot. Initialized hardware at the earlier stage
• Ported lcd driver to u-boot. Familiar with tilcdc driver
• Implemented driver for flow sensor, PT sensor and tri-color leds
• Familiar with Sysvinit, Systemd, dbus
• Implemented HAL, daemons, apps in go and python
• Familiar with mqtt, WebSocket, restful API
• Familiar with RxRust, Asyncio
• Familiar with sqlite ORM. Includes peewee(py), GORM(go)
• Open source project porting
  • Ported numpy, scipy, pandas, scikit-learn to yocto
  • Ported rust-qt/ritual to yocto
• Investigated and fixed the most complicated issues

MCU · RTOS

• Familiar with esp32, FreeRTOS
• Implemented ulp program which is written in Assembly
• Implemented HAL and framework for easily porting
• Implemented http client and server

Software Development

• Agile Development, Jira, Git Flow with github and gitlab
• CI/CD: Nightly build or trigger a build when the code is changed

Jul 2015 - Jun 2017

CTO  Yongyun Eletronic

DSP

• Familiar with SHARC ADSP21489 by Analog Device Inc
• Implemented custom modules for SigmaStudio
• Support Hi-Res Audio. Support 96kHz real time calculation for all algorithms
• Parameter Equalizer. Support Peak, Low-shelf, high-shelf type filter and custom parameters for frequency, gain and Q(Bandwidth)
• High/Low pass filter: Support Bessel, Butterworth, Linkwitz–Riley filter and 6, 12, 24 dB per octave
• Feedback Eliminator(FBE): Support by a Frequency Shifter which is based on Hilbert Transform
• Familiar with Pitch Shifter, Echo(Stereo Echo), Reverb, Compressor, Mixer

MCU

• Familiar with Cortex-m0 MCU by Nuvoton
• SPI, I2C, Uart, USB(HID device), LED, LCD, NEC ir....etc
• Support security communication and anti-crack protection
• Hardware/Software debugging: Familiar with Multimeter, Oscilloscope, Logic analyzer, Audio Precision, JTAG ICE

Android App

• Familiar with Reactive programming with RxJava

Windows App

• Familiar Pyside(QT binding) and Reactive programming with RxPy
• Show frequency response (Data visualization) by Matplotlib
• Communicate with audio devices through BT and USB

Oct 2013 - Jun 2015

Co-Founder  8tory

Scrum Master

• I introduced Scrum to the team. Communicated with team members and product owner. Maintained the product backlog, stories and sprints

Android App

• Familiar with Reactive Programming(RxJava), Lambda, Method Chaining
• Database: SQL(ActiveAndroid as ORM), NoSQL(Parse, Couchbase)
• Facebook API: android-simple-facebook, RetroFacebook, RxFacebook
• Algorithm: Search for the fitting memory at the moment(time and space)

Oct 2011 - Sep 2013

Software Supervisor  Gigabyte

Engineering Manager

• Responsible for BSP and SI and managing a maximum of 8 members

Android System Integration

• Improved system stability and performance
• Fixed system level bugs, Andoid original bugs, CTS issues.
• Familiar with daemon, Android HAL, Android framework

Android BSP

• Board bring up
• Driver porting: touch panel, lcm, sensors, audio, sd card, camera, power
• Implemented daemon, HAL, service, framework