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Work History

Jan 2018Current

Backend Developer

Amazon Corporate LLC - Digital Content and Commerce Services / Vancouver, BC, Canada
  • Building & maintaining royalty aggregation hybrid system by combining between on premises system and native AWS.
  • Integrating existing payment approval system with automatic invoicing pipelines, reducing manual efforts by 90% when creating invoices for payments.
  • DCCS Star Performer 2020.
Oct 2016June 2017

Backend Developer

Amazon Corporate LLC - Alexa Org / Seattle, WA, US
  • My team delivered Echo Show in May 2017. This product enhances customers' experiences by introducing a touch screen which enables more possibilities to interact and provides rich contents to users: www.amazon.com/echoshow 
  • Using Java to deliver new features as well as improving business's logic behind Alexa Music, integrating Alexa Music service with various of cloud services such as Pandora, SiriusXM, Spotify.
  • Working with Alexa Video Team & FireTV team to design new features enabled on next generation of FireTV. We also design APIs to allow other 3rd Party Video Providers joining Alexa by using Self-defined skills www.alexaskillstore.com 
Dec 2015June 2016

VoIP Engineer

EdooPAD, Inc / Sunnyvale, CA, US
  • Improved existing VoIP system by focusing on quality of service.
    • Used C to optimize OpenSIPS modules to prevent call interrupts and improve video/voice call experience.
    • Made changes to OpenSIPS modules to work with our self-designed protocols and client applications.
  • Used Python & Lua scripts to support multiple layers of clustering for systems high availability.
    • I supported OpenSIPS with full HA capabilities, including Heartbeat, Virtual-IPs, OpenSIPS Dynamic Load Balancing.
Sep 2012Jan 2014

Software Analyst

USS / Ho Chi Minh city, Viet Nam
  • Used forensics tools such as Wireshark, ProcMon, Process Explorer, and various Windows Sysinternal tools to collect system information and invoke software APIs for remote system administration without graphical user interaction.

Education

20082012

BS Computer Science

Ho Chi Minh City University of Science

Honor Program for top 5% students

  • Computer network fundamental.
    • SMTP Client, FTP Client written in C++
  • Cryptography.
    • VPN client library for Android 2.x and 3.x. Written in C.
    • Virtual disk with extra layer of encryption & redundancy to reduce chance of data loss. Written in C.

My bachelor's thesis is "Quick Network Bandwidth Comparison" which compared bandwidth available for two given paths with 99% accuracy under 1 second and minimizes the network overhead with only 10 to 50 probing packets.