Zerodha defies all the things that a profitable company does. They are a 30-40 member tech team that runs Indias largest stockbroking platform which also includes direct mutual fund and a plethora of other things like investor education etc, all of which are the best in class. Ruthless prioritisation, focus and they know their purpose of existence which probably makes it easy.
Here is a sneak peek into their technology stack
I don’t believe everything thats folks at Marcellus say but their honesty and hard work is evident