I just can't write normal software

You're weird but not alone.

I can't write an app or web site to save my life.

However, if you need to analyze 100MM lines of code with bespoke methods, speed up a mature system built by CS PhDs by 10X, do customer segmentation from micro to macro on billions of transactions - no problem.

See also post from 3 days ago: https://news.ycombinator.com/item?id=36989504