Andreas Pin, born in 1972 in the city of Surabaya, an Indonesian citizen.

I have been teaching as a mathematics and physics tutor since 1991, I have been working in this job until 2024, and I graduated from Petra Christian University in 1997 and I am studying again at ITS majoring in manufacturing engineering in 1999.

Since my graduation, I have only worked as a mathematics tutor at middle school, high school and university levels, that's all my introduction