Jonathan Tsai, (Chinese name: 蔡培正, cai4 pei2 zheng4)

I am a Christian who…

  • is a sinner
  • has been saved by grace alone, through faith alone, in Christ alone (Ephesians 2:8-9)
  • loves to study and meditate upon God’s word, the Bible
  • is a slave to the Lord Jesus Christ, apart from whom I have no good (Psalm 16:2)

I am a husband who…

I am a Student who…

  • is a lifelong student of the Bible, God’s holy and precious word revealed to undeserving men like me
  • likes to study languages, such as: Chinese, French, Greek, Hebrew, Korean, and recently, Spanish
  • graduated from UC Berkeley in 2006 with a Bachelor’s degree in Computer Science. I still enjoy learning about computer science. If I’m really bored, I’ll try to solve some Facebook Puzzles

I am a Computer Scientist / Software Engineer / Geek who…

  • currently works at Yahoo! as a back end software engineer for Fantasy Sports.
  • has worked at places like, Intuit,, also as a software engineer
  • names all of my computers and network devices, sometimes taking hours to come up with a name
  • dreams of home automation, and recently started dabbling with open source software at GitHub
  • has almost exclusively worked with multi-tiered web applications, and maintains several websites (including my personal blog at Xanga, just for fun)

I am a Musician who…

  • enjoys playing music on all kinds of instruments (I consider the voice as an instrument in this regard)
  • learned piano from K-5th grade, violin from 4-12th grade, and picked up guitar freshman year in college.
  • tries to write and compose my own songs.

I am a(n amateur) Photographer who…

  • shoots with a Canon DSLR and a set of L lenses
  • posts my pictures to Flickr

I am a Bay Area, California Native who…

  • grew up in the Bay Area (San Jose)
  • went to school at UC Berkeley and got to enjoy road biking through the Berkeley Hills often.
  • really likes to play basketball