Hi, I'm Daffa Muhammad Zidan.

I'm building Pejuang Indonesia Cerdas, an edtech company that helps Indonesian students prepare for science olympiads and university entrance exams. Our olympiad platform, Pejuang OSN & Prestasi, has 23,388 students, including 139 of the 270 medalists at OSN 2026.

I'm especially interested in economics and machine learning. Here I keep a notebook of what I'm learning as I build, the projects I've shipped, and a library of the books, films and videos I'd hand to a friend.

Fig. 1 Gradient descent with momentum · step 0 · loss 0.0000

Drag to turn the plot · click the surface to start a new descent